high speed modem
•Download as PPT, PDF•
2 likes•3,300 views
The document discusses high speed modems, specifically 56K modems. It introduces modems and their function in modulating and demodulating data for transmission. It then discusses the development of 56K modems that could transmit data at speeds up to 56Kbps asymmetrically, uploading at lower speeds than downloading. The working of these modems required pairs to transmit data over analog phone lines, with conversions that could impact speed. Limitations like bandwidth, signal-to-noise ratio, and conversions affected the maximum speeds modems could achieve. For a 56K modem to reach its specified speeds, certain requirements had to be met regarding interference, computer processing power, firmware, ISP equipment compatibility and use of digital lines
Report
Share
Report
Share
![ASSIGNMENT OF DATA COMMUNICATION HIGH SPEEED MODEM ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Recommended
IBOC TECHNOLOGY
This document discusses IBOC (In-Band On-Channel) technology, which allows digital audio broadcasting without requiring new spectrum allocations. IBOC inserts a digital sideband signal within the existing AM and FM bands. There are three modes of IBOC operation: hybrid mode, extended hybrid mode, and all-digital mode. IBOC implementation can use either low-level or high-level combining of FM and IBOC signals. Benefits of digital radio include high quality audio and added services, but adoption has been delayed by issues like interference and costs.
A seminar presentation on "Design and Simulation of E and U shape Microstrip ...
E and U shape microstrip patch radio wire (antenna) with SMA Connector technique, HFSS (High Frequency Structural Simulator) adaptation 13.0.
Fibre splicing
This document discusses different methods of fibre splicing used to join optical fibers, including fusion splicing, mechanical splicing, and array splicing. Fusion splicing involves heating the fiber ends and fusing them together, while mechanical splicing uses tubes, V-grooves, or other guides to hold the fibers in alignment without heating. Array splicing allows simultaneously splicing multiple fibers in a ribbon using techniques like electric arc fusion or V-groove chips. Average splice losses are typically 0.1 dB or less depending on the splicing technique and fiber type.
Switching techniques
Circuit switching establishes a dedicated electrical path between source and destination before data transmission, but it wastes bandwidth if no data is being sent and has high initial delays. Store-and-forward switching breaks messages into packets that are transmitted independently between nodes, allowing more efficient use of bandwidth. Packet switching is commonly used as it offers better delay characteristics than message switching and requires less buffer storage than transmitting full messages.
Top 10 telecommunications engineer interview questions and answers
This document provides resources for preparing for a telecommunications engineer interview, including common interview questions, examples of thank you letters, resumes, cover letters, and other tips. It includes lists of popular interview questions and answers on topics like why you are interested in the role, challenges you have overcome, and what you know about the company. The document emphasizes researching the company, having well-thought answers prepared, and following up after the interview. Overall, the document aims to help candidates successfully prepare for and complete a telecommunications engineer interview.
Line Coding.pptx
Line coding refers to converting digital data into digital signals for transmission. There are several characteristics line coding schemes should have, such as low complexity, noise tolerance, no DC component, error detection capability, and self-synchronization. Common line coding techniques include unipolar, polar, and bipolar coding. Specific techniques discussed include non-return to zero (NRZ), return to zero (RZ), Manchester, and differential Manchester coding. These techniques vary in their voltage levels, presence of a DC component, synchronization capabilities, and bandwidth requirements.
IEEE 802.22 WRAN Standard
Studied the physical layer design and challenges of the very new wireless standard in a group of
two.
Public Switched Telephone Network
The document provides an overview of the public switched telephone network (PSTN). It discusses that the PSTN is the interconnected telephone system that uses copper wires to make circuit-switched calls. It then covers the evolution of the PSTN from its invention in 1876 to present digital switches, the use of bandwidth allocation and numbering schemes, and call setup which involves signaling and switching systems to route calls.
Recommended
IBOC TECHNOLOGY
This document discusses IBOC (In-Band On-Channel) technology, which allows digital audio broadcasting without requiring new spectrum allocations. IBOC inserts a digital sideband signal within the existing AM and FM bands. There are three modes of IBOC operation: hybrid mode, extended hybrid mode, and all-digital mode. IBOC implementation can use either low-level or high-level combining of FM and IBOC signals. Benefits of digital radio include high quality audio and added services, but adoption has been delayed by issues like interference and costs.
A seminar presentation on "Design and Simulation of E and U shape Microstrip ...
E and U shape microstrip patch radio wire (antenna) with SMA Connector technique, HFSS (High Frequency Structural Simulator) adaptation 13.0.
Fibre splicing
This document discusses different methods of fibre splicing used to join optical fibers, including fusion splicing, mechanical splicing, and array splicing. Fusion splicing involves heating the fiber ends and fusing them together, while mechanical splicing uses tubes, V-grooves, or other guides to hold the fibers in alignment without heating. Array splicing allows simultaneously splicing multiple fibers in a ribbon using techniques like electric arc fusion or V-groove chips. Average splice losses are typically 0.1 dB or less depending on the splicing technique and fiber type.
Switching techniques
Circuit switching establishes a dedicated electrical path between source and destination before data transmission, but it wastes bandwidth if no data is being sent and has high initial delays. Store-and-forward switching breaks messages into packets that are transmitted independently between nodes, allowing more efficient use of bandwidth. Packet switching is commonly used as it offers better delay characteristics than message switching and requires less buffer storage than transmitting full messages.
Top 10 telecommunications engineer interview questions and answers
This document provides resources for preparing for a telecommunications engineer interview, including common interview questions, examples of thank you letters, resumes, cover letters, and other tips. It includes lists of popular interview questions and answers on topics like why you are interested in the role, challenges you have overcome, and what you know about the company. The document emphasizes researching the company, having well-thought answers prepared, and following up after the interview. Overall, the document aims to help candidates successfully prepare for and complete a telecommunications engineer interview.
Line Coding.pptx
Line coding refers to converting digital data into digital signals for transmission. There are several characteristics line coding schemes should have, such as low complexity, noise tolerance, no DC component, error detection capability, and self-synchronization. Common line coding techniques include unipolar, polar, and bipolar coding. Specific techniques discussed include non-return to zero (NRZ), return to zero (RZ), Manchester, and differential Manchester coding. These techniques vary in their voltage levels, presence of a DC component, synchronization capabilities, and bandwidth requirements.
IEEE 802.22 WRAN Standard
Studied the physical layer design and challenges of the very new wireless standard in a group of
two.
Public Switched Telephone Network
The document provides an overview of the public switched telephone network (PSTN). It discusses that the PSTN is the interconnected telephone system that uses copper wires to make circuit-switched calls. It then covers the evolution of the PSTN from its invention in 1876 to present digital switches, the use of bandwidth allocation and numbering schemes, and call setup which involves signaling and switching systems to route calls.
Phase modulation
Phase modulation (PM) is a form of modulation where information is represented by variations in the instantaneous phase of a carrier wave. The phase angle of the complex envelope is changed in direct proportion to the message signal. PM can be considered a special case of FM where the carrier frequency modulation is given by the time derivative of the phase modulation. The bandwidth of PM for a single sinusoidal signal is approximately equal to the modulation index multiplied by the carrier frequency.
Infrared technology
This document discusses infrared technology and its applications. It describes how infrared uses electromagnetic radiation with wavelengths longer than those of visible light. It also explains different infrared data transmission techniques like directed beam, omnidirectional, and diffused transmission. The document discusses how infrared is used for wireless communication in local networks and protocols like IrDA. It provides examples of infrared applications in keyboards, scanning documents, and mobile devices. Finally, it outlines some advantages and disadvantages of infrared technology.
Angle modulation
Frequency or phase of message signal is varied according to the message signal.The amplitude is kept constant.
Laser communications ppt
The document discusses laser communication systems. It begins with an introduction that explains laser communication works similarly to fiber optic links but transmits a beam through free space instead of a cable. It then covers what laser communication is, how the one-way system works with a laser transmitter that modulates a signal and a receiver with a telescope and detector, and modulation techniques like OOK, PWM, and PFM. Applications are discussed along with advantages like high bandwidth and disadvantages like beam dispersion in the atmosphere.
Tunable filters
The attached narrated power point presentation attempts to explain the different types of tunable filters for WDM Systems. The material will be useful for KTU final year B Tech students who prepare for the subject EC 405, Optical Communications.
Transmission Media
A short ppt on transmission media with its pros cons guided unguided and other sub topics explained in a brief non technical manner so that it is easy to explain and answer questions upon... enjoy
LASER Communication
Laser communication systems use lasers to transmit data through free space instead of fiber optic links. The basic components are a transmitter with a laser diode, modulator and signal processing unit, a receiver with a telescope, photon sensor and signal processing unit, and the laser beam that travels through the medium. Common modulation techniques are ON-OFF keying, pulse width modulation and pulsed frequency modulation. Laser communication offers advantages over fiber optics and microwaves by having lower installation and maintenance costs, the ability to transmit through free space including satellite links, higher bandwidth, more secure and narrow beams compared to microwaves. While atmospheric effects can impact the laser link, techniques like tuning and multiple transmitters can reduce these impacts. Current applications
Laser Communication
Laser communication uses lasers to transmit information through free space instead of fiber optic cables. It works similarly to fiber optics but transmits the beam through the atmosphere instead of cables. The transmitter converts signals into laser light and the receiver includes a telescope to capture the beam and detectors to convert it back into signals. Laser communication has advantages over radio frequency and fiber optics for applications where laying cable is not possible or practical such as for satellites, remote areas, and emergencies due to its high bandwidth, directivity, security, and smaller antenna size.
5.10 Fiber optics
Fiber optics use total internal reflection to transmit light signals for communication. They convert electrical signals to optical signals using a transmitter, transmit the light through the optical fiber, then convert it back to an electrical signal using a receiver. Fiber optics have huge bandwidth potential and are immune to electromagnetic interference but were initially more expensive than electrical cables. Key advantages include bandwidths over 250Gbps, low signal loss, and resistance to corrosion.
Ch 1 optical fiber introduction
This document provides an overview of optical fiber communication. It discusses how optical fibers can be used to transmit light signals for communication purposes, providing advantages over existing electrical communication systems. Key points include:
- Optical fiber communication uses light signals transmitted through optical fibers. This provides enormous potential bandwidth compared to existing electrical cables.
- Optical fibers are small, lightweight, and electrically isolated, providing advantages for installation and immunity to electromagnetic interference.
- Early optical fibers had high transmission losses, but losses were reduced below 20 dB/km by 1970, allowing commercial deployment of optical communication systems.
Optical satellite communication
This document summarizes the Small Optical User Terminal (SOUT) designed for optical communication between low Earth orbit and geostationary orbit satellites. The SOUT uses lasers for transmission and reception, with integrated transmitters, fine pointing loops to correct for disturbances, and an optical bench. It is compact in size at 200x200x150mm and has the potential to enable high-capacity intersatellite links with advantages over microwave technologies in terms of mass and power consumption.
satellite communication Notes_chapter 2
satellite communication Notes_chapter 2Valia koonambaikulathamma college of engineering and technology
Kepler's laws describe orbital motion and apply to satellites orbiting Earth. Kepler's first law states orbits are ellipses with Earth at one focus. Kepler's second law states a satellite sweeps out equal areas in equal times. Kepler's third law relates orbital period to semimajor axis. Terms are defined to describe satellite orbits, including altitude, inclination, ascending/descending nodes, and argument of perigee. Orbital elements like mean anomaly and true anomaly specify the angular position of a satellite.Presentation on different modes of data communication
This document discusses different modes of data communication, including wired and wireless technologies. It describes protocol models like OSI and TCP/IP that define network layers. Wired technologies covered include coaxial cable, fiber optic cable, and twisted pair cable. Wireless technologies discussed are Bluetooth, WiMAX, infrared, and Wi-Fi. The document provides definitions, diagrams, advantages and disadvantages of each technology discussed.
Metallization
This document provides an overview of metallization for integrated circuits. It discusses the requirements and purposes of metallization, including interconnecting thousands of devices on chips. Two common metallization methods described are vacuum evaporation and sputter deposition. Vacuum evaporation locally heats a material source to vaporize and deposit the metal film, while sputter deposition uses ion momentum from a plasma to eject atoms from a target onto the substrate. The document outlines the apparatus and processes for each technique.
FIBER OPTIC COMMUNICATION by Rupam Dey
A short & simple ppt on FIBER OPTIC COMMUNICATION. Specially for the final year students of BCA and B.Tech
Amplitude shift keying
Amplitude shift keying (ASK) is a digital modulation technique that represents binary data by changing the amplitude of a carrier wave. In binary ASK (BASK), also known as on-off keying (OOK), a high amplitude represents a binary 1 and a low or off amplitude represents a binary 0. The demodulator determines the amplitude of the received signal to recover the original data. ASK transmitters and receivers have a simple design but the transmission is susceptible to noise. ASK is used in early telephone modems and transmitting digital data over optical fibers.
broad band
This document provides an overview of broadband access technologies. It defines broadband as having a minimum download speed of 256 kbps. Broadband technologies are divided into wireline technologies like DSL, cable modem, fiber optics and wireless technologies like 3G, Wi-Fi, WiMAX. DSL remains connected at all times without needing to dial up, and provides simultaneous voice and data. DSL variants like ADSL, ADSL2, ADSL2+ are described with their upload/download speeds and ranges. Broadband enables services like high-speed internet access, video streaming, remote access and IPTV. Common broadband errors and their solutions are also listed.
Amplitude Modulation ppt
This document discusses amplitude modulation (AM) as a type of modulation used to transmit information signals. Modulation involves varying a high frequency carrier signal by an information signal in order to transmit the information signal over long distances. In AM, the amplitude of the carrier signal is varied in accordance with the instantaneous amplitude of the modulating or information signal. This creates two new sideband frequencies above and below the carrier frequency equal to the modulation frequency. The carrier and sidebands together make up the modulated signal. Only a portion of the transmitted power is present in the sidebands containing the information, while the rest is wasted in the carrier.
Fabrication of fibers
This document summarizes several methods for fabricating optical fibers, including glass, plastic, and photonic crystal fibers. The key steps in optical fiber fabrication are producing a preform, drawing fibers from the preform, and applying coatings. Common preform fabrication techniques described are outside vapor-phase oxidation, vapor-phase axial deposition, and modified chemical vapor deposition. The document also provides brief overviews of plastic and photonic crystal fiber properties.
Optical fibres
Optical fibers are thin glass rods wrapped in plastic that are used to transmit light signals for applications such as high-speed internet, telecommunications, endoscopy, and microscopy. They allow transmission of data over longer distances and in places where copper wires cannot reach. Optical fibers work via the phenomenon of total internal reflection, where light bouncing around the higher refractive index glass core is reflected back in rather than escaping at the lower refractive index cladding.
MODEM INTERNAL AND EXTERNAL
The document discusses modems, including their features, types, standards, installation, configuration, and troubleshooting. A modem modulates and demodulates signals to allow computers to transfer data over phone or cable lines. Common modem types include internal, external, 56K, ISDN, DSL, cable, and USB modems. Standards like V.90, V.92, and V.34 define modulation techniques for high-speed data transmission. Best practices for installing a modem include reading documentation, using anti-static protection, and testing the modem once configured.
Network modem
Modems allow computers to transfer data over telephone or cable lines by converting digital signals to analog and vice versa. They come in internal and external varieties and support different transmission speeds like 56kbps for X2 modems and 64kbps for ISDN. Common modem types are X2, V.90, ISDN, DSL, and cable which use different connection technologies to transmit data at varying speeds over phone lines or cable infrastructure. Proper installation and safety precautions should be followed when installing a modem.
More Related Content
What's hot
Phase modulation
Phase modulation (PM) is a form of modulation where information is represented by variations in the instantaneous phase of a carrier wave. The phase angle of the complex envelope is changed in direct proportion to the message signal. PM can be considered a special case of FM where the carrier frequency modulation is given by the time derivative of the phase modulation. The bandwidth of PM for a single sinusoidal signal is approximately equal to the modulation index multiplied by the carrier frequency.
Infrared technology
This document discusses infrared technology and its applications. It describes how infrared uses electromagnetic radiation with wavelengths longer than those of visible light. It also explains different infrared data transmission techniques like directed beam, omnidirectional, and diffused transmission. The document discusses how infrared is used for wireless communication in local networks and protocols like IrDA. It provides examples of infrared applications in keyboards, scanning documents, and mobile devices. Finally, it outlines some advantages and disadvantages of infrared technology.
Angle modulation
Frequency or phase of message signal is varied according to the message signal.The amplitude is kept constant.
Laser communications ppt
The document discusses laser communication systems. It begins with an introduction that explains laser communication works similarly to fiber optic links but transmits a beam through free space instead of a cable. It then covers what laser communication is, how the one-way system works with a laser transmitter that modulates a signal and a receiver with a telescope and detector, and modulation techniques like OOK, PWM, and PFM. Applications are discussed along with advantages like high bandwidth and disadvantages like beam dispersion in the atmosphere.
Tunable filters
The attached narrated power point presentation attempts to explain the different types of tunable filters for WDM Systems. The material will be useful for KTU final year B Tech students who prepare for the subject EC 405, Optical Communications.
Transmission Media
A short ppt on transmission media with its pros cons guided unguided and other sub topics explained in a brief non technical manner so that it is easy to explain and answer questions upon... enjoy
LASER Communication
Laser communication systems use lasers to transmit data through free space instead of fiber optic links. The basic components are a transmitter with a laser diode, modulator and signal processing unit, a receiver with a telescope, photon sensor and signal processing unit, and the laser beam that travels through the medium. Common modulation techniques are ON-OFF keying, pulse width modulation and pulsed frequency modulation. Laser communication offers advantages over fiber optics and microwaves by having lower installation and maintenance costs, the ability to transmit through free space including satellite links, higher bandwidth, more secure and narrow beams compared to microwaves. While atmospheric effects can impact the laser link, techniques like tuning and multiple transmitters can reduce these impacts. Current applications
Laser Communication
Laser communication uses lasers to transmit information through free space instead of fiber optic cables. It works similarly to fiber optics but transmits the beam through the atmosphere instead of cables. The transmitter converts signals into laser light and the receiver includes a telescope to capture the beam and detectors to convert it back into signals. Laser communication has advantages over radio frequency and fiber optics for applications where laying cable is not possible or practical such as for satellites, remote areas, and emergencies due to its high bandwidth, directivity, security, and smaller antenna size.
5.10 Fiber optics
Fiber optics use total internal reflection to transmit light signals for communication. They convert electrical signals to optical signals using a transmitter, transmit the light through the optical fiber, then convert it back to an electrical signal using a receiver. Fiber optics have huge bandwidth potential and are immune to electromagnetic interference but were initially more expensive than electrical cables. Key advantages include bandwidths over 250Gbps, low signal loss, and resistance to corrosion.
Ch 1 optical fiber introduction
This document provides an overview of optical fiber communication. It discusses how optical fibers can be used to transmit light signals for communication purposes, providing advantages over existing electrical communication systems. Key points include:
- Optical fiber communication uses light signals transmitted through optical fibers. This provides enormous potential bandwidth compared to existing electrical cables.
- Optical fibers are small, lightweight, and electrically isolated, providing advantages for installation and immunity to electromagnetic interference.
- Early optical fibers had high transmission losses, but losses were reduced below 20 dB/km by 1970, allowing commercial deployment of optical communication systems.
Optical satellite communication
This document summarizes the Small Optical User Terminal (SOUT) designed for optical communication between low Earth orbit and geostationary orbit satellites. The SOUT uses lasers for transmission and reception, with integrated transmitters, fine pointing loops to correct for disturbances, and an optical bench. It is compact in size at 200x200x150mm and has the potential to enable high-capacity intersatellite links with advantages over microwave technologies in terms of mass and power consumption.
satellite communication Notes_chapter 2
satellite communication Notes_chapter 2Valia koonambaikulathamma college of engineering and technology
Kepler's laws describe orbital motion and apply to satellites orbiting Earth. Kepler's first law states orbits are ellipses with Earth at one focus. Kepler's second law states a satellite sweeps out equal areas in equal times. Kepler's third law relates orbital period to semimajor axis. Terms are defined to describe satellite orbits, including altitude, inclination, ascending/descending nodes, and argument of perigee. Orbital elements like mean anomaly and true anomaly specify the angular position of a satellite.Presentation on different modes of data communication
This document discusses different modes of data communication, including wired and wireless technologies. It describes protocol models like OSI and TCP/IP that define network layers. Wired technologies covered include coaxial cable, fiber optic cable, and twisted pair cable. Wireless technologies discussed are Bluetooth, WiMAX, infrared, and Wi-Fi. The document provides definitions, diagrams, advantages and disadvantages of each technology discussed.
Metallization
This document provides an overview of metallization for integrated circuits. It discusses the requirements and purposes of metallization, including interconnecting thousands of devices on chips. Two common metallization methods described are vacuum evaporation and sputter deposition. Vacuum evaporation locally heats a material source to vaporize and deposit the metal film, while sputter deposition uses ion momentum from a plasma to eject atoms from a target onto the substrate. The document outlines the apparatus and processes for each technique.
FIBER OPTIC COMMUNICATION by Rupam Dey
A short & simple ppt on FIBER OPTIC COMMUNICATION. Specially for the final year students of BCA and B.Tech
Amplitude shift keying
Amplitude shift keying (ASK) is a digital modulation technique that represents binary data by changing the amplitude of a carrier wave. In binary ASK (BASK), also known as on-off keying (OOK), a high amplitude represents a binary 1 and a low or off amplitude represents a binary 0. The demodulator determines the amplitude of the received signal to recover the original data. ASK transmitters and receivers have a simple design but the transmission is susceptible to noise. ASK is used in early telephone modems and transmitting digital data over optical fibers.
broad band
This document provides an overview of broadband access technologies. It defines broadband as having a minimum download speed of 256 kbps. Broadband technologies are divided into wireline technologies like DSL, cable modem, fiber optics and wireless technologies like 3G, Wi-Fi, WiMAX. DSL remains connected at all times without needing to dial up, and provides simultaneous voice and data. DSL variants like ADSL, ADSL2, ADSL2+ are described with their upload/download speeds and ranges. Broadband enables services like high-speed internet access, video streaming, remote access and IPTV. Common broadband errors and their solutions are also listed.
Amplitude Modulation ppt
This document discusses amplitude modulation (AM) as a type of modulation used to transmit information signals. Modulation involves varying a high frequency carrier signal by an information signal in order to transmit the information signal over long distances. In AM, the amplitude of the carrier signal is varied in accordance with the instantaneous amplitude of the modulating or information signal. This creates two new sideband frequencies above and below the carrier frequency equal to the modulation frequency. The carrier and sidebands together make up the modulated signal. Only a portion of the transmitted power is present in the sidebands containing the information, while the rest is wasted in the carrier.
Fabrication of fibers
This document summarizes several methods for fabricating optical fibers, including glass, plastic, and photonic crystal fibers. The key steps in optical fiber fabrication are producing a preform, drawing fibers from the preform, and applying coatings. Common preform fabrication techniques described are outside vapor-phase oxidation, vapor-phase axial deposition, and modified chemical vapor deposition. The document also provides brief overviews of plastic and photonic crystal fiber properties.
Optical fibres
Optical fibers are thin glass rods wrapped in plastic that are used to transmit light signals for applications such as high-speed internet, telecommunications, endoscopy, and microscopy. They allow transmission of data over longer distances and in places where copper wires cannot reach. Optical fibers work via the phenomenon of total internal reflection, where light bouncing around the higher refractive index glass core is reflected back in rather than escaping at the lower refractive index cladding.
What's hot (20)
Presentation on different modes of data communication
Presentation on different modes of data communication
Viewers also liked
MODEM INTERNAL AND EXTERNAL
The document discusses modems, including their features, types, standards, installation, configuration, and troubleshooting. A modem modulates and demodulates signals to allow computers to transfer data over phone or cable lines. Common modem types include internal, external, 56K, ISDN, DSL, cable, and USB modems. Standards like V.90, V.92, and V.34 define modulation techniques for high-speed data transmission. Best practices for installing a modem include reading documentation, using anti-static protection, and testing the modem once configured.
Network modem
Modems allow computers to transfer data over telephone or cable lines by converting digital signals to analog and vice versa. They come in internal and external varieties and support different transmission speeds like 56kbps for X2 modems and 64kbps for ISDN. Common modem types are X2, V.90, ISDN, DSL, and cable which use different connection technologies to transmit data at varying speeds over phone lines or cable infrastructure. Proper installation and safety precautions should be followed when installing a modem.
Presentation on modem
A modem is a device that modulates analog signals to transmit digital data and demodulates received analog signals to reconstruct the original digital data. It has a transmitter that converts digital to analog, a receiver that converts analog to digital, and a control unit that handles functions like auto-dialing. Modems use various modulation techniques like amplitude modulation, frequency modulation, and phase modulation. They are classified by operation mode, synchronization method, transmission medium, and modulation technique. Newer technologies like DSL provide higher speeds over telephone lines than traditional modems.
Modem presentation
The document discusses modems and their functions. It begins with listing group members and an index of topics to be covered. It then defines a modem as a device that modulates and demodulates signals to transmit digital data over analog channels. Modems are classified by transmission speed and examples are given. The document outlines the history of modems and defines types including external, internal, standard, intelligent, short-haul, and wireless. It describes the purpose of modems in converting digital to analog signals for transmission and discusses modem functions like error correction and data compression. Security and references are mentioned at the end.
Modem
Modems are devices that modulate analog carrier signals to encode digital data for transmission and demodulate carrier signals to decode received data. They are used for data conversion. Modems can be classified based on their range (short haul, voice grade, wide band), the type of line used (dialup, leased), and their operation mode (half duplex, full duplex, simplex). Common types include internal and external modems. Modems work by modulating digital signals onto analog carriers for transmission and demodulating the signals back to digital on the receiving end. Modem speeds have increased significantly over time from 300 bps in the 1960s to 56 kbps in 1998 and up to 8 mbps with technologies like ADS
Modem technology
Short for modulator-demodulator. A modem is a device or program that enables a computer to transmit data over, for example, telephone or cable lines. Computer information is stored digitally, whereas information transmitted over telephone lines is transmitted in the form of analog waves. A modem convertsbetween these two forms.
Introduction to modem
Modems enable computers to connect over telephone lines using modulation and demodulation techniques. Early modems in the 1950s operated at speeds up to 300 bps and were used to connect remote terminals to mainframe computers. Through the 1980s and 1990s, modem speeds increased to 14.4 kbps and 56 kbps, allowing individuals to connect to remote systems and the emerging Internet to download software and participate in online discussions. Modern alternatives to analog modems include cable modems, DSL, and fiber optic connections, providing speeds of over 1 Mbps. Cable and DSL use existing coaxial cable and telephone lines respectively but provide higher speeds than traditional modems.
Modem
A modem is a device that allows computers to transmit data over telephone lines by converting digital signals to analog signals and vice versa. Modems can be external, connecting to computers through serial or USB ports, or internal, inserting directly into expansion slots inside computers. Modem standards have evolved from early speeds of 300 bps up to 56 kbps with V.90 and V.92 standards, and modem types include cable modems, DSL modems, ISDN modems, and wireless modems.
Modem
El documento describe los conceptos básicos de los módems, incluyendo su historia, tipos de modulación, velocidades de transmisión, interfaces, tipos de módems y esquema de bloques. También explica la tecnología ADSL, que permite velocidades de transmisión más altas que los módems tradicionales a través de líneas telefónicas convencionales de forma asimétrica, con mayores velocidades de recepción que de envío.
Viewers also liked (11)
Similar to high speed modem
Overview of Modem
This document provides an overview of modems, including:
- Their history dating back to the 1950s for air defense communication needs.
- Their function of modulating digital data to analog signals for transmission and demodulating analog signals back to digital data.
- The main types based on connection, transmission mode, and speed of data transmission.
- The basic modulation techniques used including ASK, FSK, and PSK.
modems-181228171523.pdf
The document discusses modems, including their functions, components, types, features, standards, and installation. Specifically:
- Modems allow computers to transmit digital data over telephone lines by modulating digital signals for transmission and demodulating the signals upon receipt.
- There are two main types - internal modems installed inside computers and external modems connected via cable. Features, transmission speeds, and capabilities can vary between modems.
- Common standards that govern modem functions include V90, V92, X2, and protocols like ARQ that ensure error-free data transmission. Installation is typically straightforward after inserting an internal modem or connecting an external one.
Presentation on Modem working procedures
A modem modulates outgoing digital signals from a computer or other digital device to analog signals for a conventional copper twisted pair telephone line and demodulates the incoming analog signal and converts it to a digital signal for the digital device.
The word modem is an acronym for modulator-demodulator. Basically, a modem is used for transmitting and receiving data over a communication channel, such as twisted-pair telephone lines, coaxial cables, and optical fibers. Currently the purpose of a modem is to convert a computer’s data stream to analog format so that it can be transmitted over the analog telephone line.
At the source, modulation techniques are used to convert digital
Data (0’s and 1’s) into analog form for transmission across the channel. At the destination, the received analog signal is converted to digital data via demodulation. This is a simplified explanation of how a modem works, and there are other issues that require attention; such as channel impairments, encryption, error detection/correction, data compression, modulation, handshake negotiation, and echo cancellation. These features will be discussed a bit later.
Voice and Data Delivery Networks
The document discusses different types of home internet connections, including dial-up modems, DSL, and cable modems. It describes how 56k dial-up modems worked using both analog and digital signaling to achieve higher speeds. Digital Subscriber Line (DSL) connections transmit data over existing telephone lines at speeds from hundreds of kbps to several mbps using technology like ADSL, VDSL2, and RADSL. Cable modems provide high-speed internet access through a cable television connection and separate computer data from video signals.
Powerpoint exam
This document provides an overview of different voice and data delivery networks. It discusses dial-up modems including the evolution from 33.6 kbps to 56 kbps standards. It also describes digital subscriber line (DSL) basics, formats like ADSL, and components needed for DSL connection. Cable modems are introduced as an alternative for high-speed internet access over cable television connections.
Public Switched Telephone Network (PSTN)
The document discusses various aspects of the Public Switched Telephone Network (PSTN). It covers topics like modulation/demodulation schemes used to convert between analog and digital signals, the bandwidth of telephone lines, traditional modem standards like V.32, V.90, ADSL, techniques used for multiplexing like TDM and WDM, and components within switching offices. It provides technical details on how analog voice signals are converted to digital, transmitted through digital trunks, and switched within the network.
Modulation demodulation assignment
The document discusses modems and their functions. It begins by defining a modem as a device that modulates and demodulates signals to allow computers to communicate over telephone lines. It then describes the main components of a modem:
1. Modulation: The process of varying a carrier signal to encode digital data for transmission.
2. Demodulation: The process of extracting the original digital data from the received modulated carrier signal.
3. Analog to digital and digital to analog conversion: Processes that allow analog signals to be transmitted over phone lines by converting between analog and digital formats.
The document goes on to discuss different types of modulation, demodulation, and conversion techniques in more detail.
Networking Concepts Lesson 11 - Enterprise & Distributed Networks - Eric Vand...
This document discusses networking concepts related to expanding networks, modems, digital modems, carriers, remote access services (RRAS), virtual private networks (VPN), virtual local area networks (VLAN), routing, brouters, and gateways. Key points include the evolution of modem standards to support higher speeds, differences between asynchronous and synchronous communication, digital modem technologies like ISDN and DSL, remote access protocols like PPP, and VPNs as a more secure and cost-effective alternative to modem pools.
2010fall ch8 18ulziisuren
This document discusses various access technologies used for broadband internet connections, including DSL, cable, wireless, and microwave radio systems. It describes technologies like ADSL, VDSL, HDSL, and DOCSIS that provide internet access over existing telephone lines or cable infrastructure. Wireless options like Wi-Fi, WiMAX, MMDS, and 3G cellular are also summarized. The document concludes with an overview of microwave radio systems, discussing technologies like parabolic antennas, repeaters, multipath fading, and environmental factors that can impact microwave signals.
Li Fi technology
Li-Fi is a wireless optical networking technology that uses light-emitting diodes (LEDs) for data transmission. It was coined by Harald Haas at the University of Edinburgh in 2011. Li-Fi provides higher speeds and more bandwidth than Wi-Fi, with the added benefit of not interfering with other wireless networks. Li-Fi works by varying the rate at which an LED light flickers on and off, which encodes data. Products like Li-Fi 1st and Li-Flame have been developed to transmit data through LED lights at speeds up to 5Mbps downlink and 5Mbps uplink within a range of 3 meters. Solar Li-Fi uses existing LED lights and solar panels to transmit
final presentation
This document provides an overview of software-defined radio (SDR) technology. It defines SDR as a radio system where components are implemented via software rather than hardware. The document discusses the ideal SDR and transmitter/receiver models and explains practical implementations using components like analog-to-digital converters and digital signal processors. It also outlines the software and architectures used in SDR, including applications in public safety and military, as well as advantages like reconfigurability and easier upgrades. Some challenges like complexity and reliability issues are also noted.
Chapter 3 2-remote_network_design - Network Design
Modems convert digital data to analog signals and vice versa, allowing digital devices like computers to communicate over analog networks. Remote access servers (RAS) terminate connections from remote users and prepare data for transmission over packet networks, enabling services like remote access, VoIP, and virtual private networks. However, current RAS equipment has limitations in channel density, power consumption, and processing capability that will reduce their usefulness for newer applications.
Lifi data transmission
Li-Fi is a wireless optical networking technology that uses light-emitting diodes (LEDs) for data transmission. It is a bidirectional, high-speed and fully networked wireless communication technology. Li-Fi uses visible light communication and is similar to Wi-Fi but uses light rather than radio waves. The document discusses the history, working, advantages and applications of Li-Fi such as in hospitals, power plants, and dense urban environments. It provides comparisons with Wi-Fi and discusses challenges and the future scope of Li-Fi technology.
Seminar
The document discusses the history and development of the internet and modems. It explains that the internet was first developed by the US military in 1979 and later opened to the public in the early 1990s. It then describes how modems allow users to connect to the internet by converting digital signals to analog signals that can be transmitted over phone lines. Finally, it outlines different types of modems including cable modems, wireless modems, and differences between DSL and broadband connections.
Communication over modem by anam younas
This document discusses computer modems and their use in network communication. It explains that a modem converts digital data to analog signals for transmission over phone lines and vice versa. It describes different types of modems, their requirements, and how they connect computers via telephone lines to provide internet access and transfer of data and information over distance.
Detailed description about Hubs Switches Modems and their working
The document discusses various networking devices including hubs, switches, and modems. It provides details on how each device works, types of each device, their applications and merits and demerits. Hubs connect devices on a network but do not filter or manage traffic. Switches can filter traffic and improve network performance by sending data only to its destination port. Modems modulate digital signals for transmission over phone lines and are used to connect networks across long distances.
wireless notice board using RF communication
Within a distance of 30 meters the data can be trasmitted or can be recieved using radio frequency range with wireless manner.
Modem | A Quick Preview
It is one of my semester project presentation along with my group members, of subject Data Communication, which covers a brief intro about all the vital things related to the modems.
Videoconferencing Technology Workshop
The document outlines an agenda for a site coordinator training on videoconferencing. It covers various topics including different videoconferencing technologies and standards like H.320 and H.323; components of an H.323 system like gatekeepers and MCUs; considerations for networking including switches vs hubs and duplex mismatch; and duties of a site coordinator.
Similar to high speed modem (20)
Networking Concepts Lesson 11 - Enterprise & Distributed Networks - Eric Vand...
Networking Concepts Lesson 11 - Enterprise & Distributed Networks - Eric Vand...
Chapter 3 2-remote_network_design - Network Design
Chapter 3 2-remote_network_design - Network Design
Detailed description about Hubs Switches Modems and their working
Detailed description about Hubs Switches Modems and their working
Recently uploaded
Let's Integrate MuleSoft RPA, COMPOSER, APM with AWS IDP along with Slack
Discover the seamless integration of RPA (Robotic Process Automation), COMPOSER, and APM with AWS IDP enhanced with Slack notifications. Explore how these technologies converge to streamline workflows, optimize performance, and ensure secure access, all while leveraging the power of AWS IDP and real-time communication via Slack notifications.
AWS Cloud Cost Optimization Presentation.pptx
This presentation provides valuable insights into effective cost-saving techniques on AWS. Learn how to optimize your AWS resources by rightsizing, increasing elasticity, picking the right storage class, and choosing the best pricing model. Additionally, discover essential governance mechanisms to ensure continuous cost efficiency. Whether you are new to AWS or an experienced user, this presentation provides clear and practical tips to help you reduce your cloud costs and get the most out of your budget.
Trusted Execution Environment for Decentralized Process Mining
Presentation of the paper "Trusted Execution Environment for Decentralized Process Mining" given during the CAiSE 2024 Conference in Cyprus on June 7, 2024.
Generating privacy-protected synthetic data using Secludy and Milvus
During this demo, the founders of Secludy will demonstrate how their system utilizes Milvus to store and manipulate embeddings for generating privacy-protected synthetic data. Their approach not only maintains the confidentiality of the original data but also enhances the utility and scalability of LLMs under privacy constraints. Attendees, including machine learning engineers, data scientists, and data managers, will witness first-hand how Secludy's integration with Milvus empowers organizations to harness the power of LLMs securely and efficiently.
Energy Efficient Video Encoding for Cloud and Edge Computing Instances
Energy Efficient Video Encoding for Cloud and Edge Computing Instances
GraphRAG for Life Science to increase LLM accuracy
GraphRAG for life science domain, where you retriever information from biomedical knowledge graphs using LLMs to increase the accuracy and performance of generated answers
Main news related to the CCS TSI 2023 (2023/1695)
An English 🇬🇧 translation of a presentation to the speech I gave about the main changes brought by CCS TSI 2023 at the biggest Czech conference on Communications and signalling systems on Railways, which was held in Clarion Hotel Olomouc from 7th to 9th November 2023 (konferenceszt.cz). Attended by around 500 participants and 200 on-line followers.
The original Czech 🇨🇿 version of the presentation can be found here: https://www.slideshare.net/slideshow/hlavni-novinky-souvisejici-s-ccs-tsi-2023-2023-1695/269688092 .
The videorecording (in Czech) from the presentation is available here: https://youtu.be/WzjJWm4IyPk?si=SImb06tuXGb30BEH .
Taking AI to the Next Level in Manufacturing.pdf
Read Taking AI to the Next Level in Manufacturing to gain insights on AI adoption in the manufacturing industry, such as:
1. How quickly AI is being implemented in manufacturing.
2. Which barriers stand in the way of AI adoption.
3. How data quality and governance form the backbone of AI.
4. Organizational processes and structures that may inhibit effective AI adoption.
6. Ideas and approaches to help build your organization's AI strategy.
Digital Banking in the Cloud: How Citizens Bank Unlocked Their Mainframe
Inconsistent user experience and siloed data, high costs, and changing customer expectations – Citizens Bank was experiencing these challenges while it was attempting to deliver a superior digital banking experience for its clients. Its core banking applications run on the mainframe and Citizens was using legacy utilities to get the critical mainframe data to feed customer-facing channels, like call centers, web, and mobile. Ultimately, this led to higher operating costs (MIPS), delayed response times, and longer time to market.
Ever-changing customer expectations demand more modern digital experiences, and the bank needed to find a solution that could provide real-time data to its customer channels with low latency and operating costs. Join this session to learn how Citizens is leveraging Precisely to replicate mainframe data to its customer channels and deliver on their “modern digital bank” experiences.
5th LF Energy Power Grid Model Meet-up Slides
5th Power Grid Model Meet-up
It is with great pleasure that we extend to you an invitation to the 5th Power Grid Model Meet-up, scheduled for 6th June 2024. This event will adopt a hybrid format, allowing participants to join us either through an online Mircosoft Teams session or in person at TU/e located at Den Dolech 2, Eindhoven, Netherlands. The meet-up will be hosted by Eindhoven University of Technology (TU/e), a research university specializing in engineering science & technology.
Power Grid Model
The global energy transition is placing new and unprecedented demands on Distribution System Operators (DSOs). Alongside upgrades to grid capacity, processes such as digitization, capacity optimization, and congestion management are becoming vital for delivering reliable services.
Power Grid Model is an open source project from Linux Foundation Energy and provides a calculation engine that is increasingly essential for DSOs. It offers a standards-based foundation enabling real-time power systems analysis, simulations of electrical power grids, and sophisticated what-if analysis. In addition, it enables in-depth studies and analysis of the electrical power grid’s behavior and performance. This comprehensive model incorporates essential factors such as power generation capacity, electrical losses, voltage levels, power flows, and system stability.
Power Grid Model is currently being applied in a wide variety of use cases, including grid planning, expansion, reliability, and congestion studies. It can also help in analyzing the impact of renewable energy integration, assessing the effects of disturbances or faults, and developing strategies for grid control and optimization.
What to expect
For the upcoming meetup we are organizing, we have an exciting lineup of activities planned:
-Insightful presentations covering two practical applications of the Power Grid Model.
-An update on the latest advancements in Power Grid -Model technology during the first and second quarters of 2024.
-An interactive brainstorming session to discuss and propose new feature requests.
-An opportunity to connect with fellow Power Grid Model enthusiasts and users.
Choosing The Best AWS Service For Your Website + API.pptx
Have you ever been confused by the myriad of choices offered by AWS for hosting a website or an API?
Lambda, Elastic Beanstalk, Lightsail, Amplify, S3 (and more!) can each host websites + APIs. But which one should we choose?
Which one is cheapest? Which one is fastest? Which one will scale to meet our needs?
Join me in this session as we dive into each AWS hosting service to determine which one is best for your scenario and explain why!
System Design Case Study: Building a Scalable E-Commerce Platform - Hiike
This case study explores designing a scalable e-commerce platform, covering key requirements, system components, and best practices.
Columbus Data & Analytics Wednesdays - June 2024
Columbus Data & Analytics Wednesdays, June 2024 with Maria Copot 20
Your One-Stop Shop for Python Success: Top 10 US Python Development Providers
Simplify your search for a reliable Python development partner! This list presents the top 10 trusted US providers offering comprehensive Python development services, ensuring your project's success from conception to completion.
Freshworks Rethinks NoSQL for Rapid Scaling & Cost-Efficiency
Freshworks creates AI-boosted business software that helps employees work more efficiently and effectively. Managing data across multiple RDBMS and NoSQL databases was already a challenge at their current scale. To prepare for 10X growth, they knew it was time to rethink their database strategy. Learn how they architected a solution that would simplify scaling while keeping costs under control.
Monitoring and Managing Anomaly Detection on OpenShift.pdf
Monitoring and Managing Anomaly Detection on OpenShift
Overview
Dive into the world of anomaly detection on edge devices with our comprehensive hands-on tutorial. This SlideShare presentation will guide you through the entire process, from data collection and model training to edge deployment and real-time monitoring. Perfect for those looking to implement robust anomaly detection systems on resource-constrained IoT/edge devices.
Key Topics Covered
1. Introduction to Anomaly Detection
- Understand the fundamentals of anomaly detection and its importance in identifying unusual behavior or failures in systems.
2. Understanding Edge (IoT)
- Learn about edge computing and IoT, and how they enable real-time data processing and decision-making at the source.
3. What is ArgoCD?
- Discover ArgoCD, a declarative, GitOps continuous delivery tool for Kubernetes, and its role in deploying applications on edge devices.
4. Deployment Using ArgoCD for Edge Devices
- Step-by-step guide on deploying anomaly detection models on edge devices using ArgoCD.
5. Introduction to Apache Kafka and S3
- Explore Apache Kafka for real-time data streaming and Amazon S3 for scalable storage solutions.
6. Viewing Kafka Messages in the Data Lake
- Learn how to view and analyze Kafka messages stored in a data lake for better insights.
7. What is Prometheus?
- Get to know Prometheus, an open-source monitoring and alerting toolkit, and its application in monitoring edge devices.
8. Monitoring Application Metrics with Prometheus
- Detailed instructions on setting up Prometheus to monitor the performance and health of your anomaly detection system.
9. What is Camel K?
- Introduction to Camel K, a lightweight integration framework built on Apache Camel, designed for Kubernetes.
10. Configuring Camel K Integrations for Data Pipelines
- Learn how to configure Camel K for seamless data pipeline integrations in your anomaly detection workflow.
11. What is a Jupyter Notebook?
- Overview of Jupyter Notebooks, an open-source web application for creating and sharing documents with live code, equations, visualizations, and narrative text.
12. Jupyter Notebooks with Code Examples
- Hands-on examples and code snippets in Jupyter Notebooks to help you implement and test anomaly detection models.
Skybuffer AI: Advanced Conversational and Generative AI Solution on SAP Busin...
Skybuffer AI, built on the robust SAP Business Technology Platform (SAP BTP), is the latest and most advanced version of our AI development, reaffirming our commitment to delivering top-tier AI solutions. Skybuffer AI harnesses all the innovative capabilities of the SAP BTP in the AI domain, from Conversational AI to cutting-edge Generative AI and Retrieval-Augmented Generation (RAG). It also helps SAP customers safeguard their investments into SAP Conversational AI and ensure a seamless, one-click transition to SAP Business AI.
With Skybuffer AI, various AI models can be integrated into a single communication channel such as Microsoft Teams. This integration empowers business users with insights drawn from SAP backend systems, enterprise documents, and the expansive knowledge of Generative AI. And the best part of it is that it is all managed through our intuitive no-code Action Server interface, requiring no extensive coding knowledge and making the advanced AI accessible to more users.
dbms calicut university B. sc Cs 4th sem.pdf
Its a seminar ppt on database management system using sql
Recently uploaded (20)
Let's Integrate MuleSoft RPA, COMPOSER, APM with AWS IDP along with Slack
Let's Integrate MuleSoft RPA, COMPOSER, APM with AWS IDP along with Slack
Trusted Execution Environment for Decentralized Process Mining
Trusted Execution Environment for Decentralized Process Mining
Generating privacy-protected synthetic data using Secludy and Milvus
Generating privacy-protected synthetic data using Secludy and Milvus
Energy Efficient Video Encoding for Cloud and Edge Computing Instances
Energy Efficient Video Encoding for Cloud and Edge Computing Instances
GraphRAG for Life Science to increase LLM accuracy
GraphRAG for Life Science to increase LLM accuracy
Nordic Marketo Engage User Group_June 13_ 2024.pptx
Nordic Marketo Engage User Group_June 13_ 2024.pptx
Digital Banking in the Cloud: How Citizens Bank Unlocked Their Mainframe
Digital Banking in the Cloud: How Citizens Bank Unlocked Their Mainframe
Choosing The Best AWS Service For Your Website + API.pptx
Choosing The Best AWS Service For Your Website + API.pptx
System Design Case Study: Building a Scalable E-Commerce Platform - Hiike
System Design Case Study: Building a Scalable E-Commerce Platform - Hiike
Your One-Stop Shop for Python Success: Top 10 US Python Development Providers
Your One-Stop Shop for Python Success: Top 10 US Python Development Providers
Freshworks Rethinks NoSQL for Rapid Scaling & Cost-Efficiency
Freshworks Rethinks NoSQL for Rapid Scaling & Cost-Efficiency
Monitoring and Managing Anomaly Detection on OpenShift.pdf
Monitoring and Managing Anomaly Detection on OpenShift.pdf
Skybuffer AI: Advanced Conversational and Generative AI Solution on SAP Busin...
Skybuffer AI: Advanced Conversational and Generative AI Solution on SAP Busin...
high speed modem
- 1. AUANGABAD