Mobile communication & vo ip

1. Presentation
Course Name: Mobile Cellular Communication
Submitted BY: Submitted To:
Shah Mohammad Russel Associate Prof. Abdul Baset
Roll No-11 Chairman
Batch-36 (Evening) EETE Department
Semester-11th DIU
Dhaka International University
Page No: 01
Date-29-03-2020

2.  VOIP
 Technical Issues
 Legal Issues
 Wireless Communication
 Health issues
 Public Awareness
Page No: 02

3. What is VoIP
 Voice over Internet Protocol, also called IP telephony,
is a method and group of technologies for the delivery
of voice communications and multimedia sessions
over Internet Protocol networks, such as the Internet.
Page No: 03

4. Skype
Gtalk
Yahoo Messenger
Nimbuzz
 Twinkle
 SIPSet
iChat
 iCall
Page no: 04
Applications of VOIP

5. VOIP- Voice Over Internet Protocol
Technical Issues-
 Large Delay
 Delay Jitter
 Frame length
 Echo cancellation
 Silence suppression
 Insecurity of internet
Page No: 05

6. Legal Issues-
 Issues about Foreign Intelligence Surveillance Act
 National Security Agency (NSA)
 Federal Communications Commission(FCC)
 Some Places Have banned All VOIP Technologies.
Difficult to administrate due to (international)
location independence of IP
VoIP also makes use of encryption more easy
ETSI is working on the issue concerning technical
arrangement
Page No: 06

7. Wireless Communication
Transmitting/receiving voice and data using
electromagnetic waves in open space.
 The information from sender to receiver is carried
over a well defined channel.
 Each channel has a fixed frequency bandwidth &
capacity(bit rate).
 Different channels can be used to transmit
information in parallel and independently

8. Wireless Applications
 CELLULAR SYSTEM
WIRELESS LANs
 SATELLITE SYSTEM
 PAGING SYSTEM
 PANs(BLUETOOTH)
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9. Health Issues
 DNA damage
 Male infertility
 Brain tumor
 Brain cancer
 Heart risks
 Oxidative Stress
 Micro RNA expression
 Blood Pressure Disruption
Page no: 13

10. Public Awareness
 According to our survey the wireless communication
devices are produced radiations which is harmful to human
health so there are some recommendations that one should
use one’s cell phone when it is necessary.
 Don’t put the cell phone in a pant and shirt pocket.
 Don’t use the cell phone for long-term which is harmful to
health because doctors suggesting the use of cell phone for
1 hour in a day which cause of brain tumor within 10 years.
 Avoid the long time conversation, use wireless head phone
when you have to talk for long call.
 Avoid using the wireless gadget like cell phone, laptop,
tablet pc, wireless keyboard and mouse so on.
Page no: 14