Devices which are used to communicate via internet are referred as communication devices. These devices include modem device, router, evos and mobile devices.

1. University of Sargodha
Dept of Biotechnology
Topic:Topic:
Communication Devices
Presented by:
Farrakh Ali Abbas
Roll#
BBTF16M06

3. What is modem?
• Modem is a device which allows a computer
to send or receive data over a telephone line
or a cable or satellite connection.
• There are 2 types of modem:• There are 2 types of modem:
a) DSL Modem
b) Cable Modem

4. Cable Modem
It is a hardware device allows your computer to communicate
with and internet service provider (ISP) over a landline
connection.
ISP: It is an organization that provides service accessing and
using the Internet.

5. DSL Modem
(Digital Subscriber Line)
It is a device used to connect a computer or a
router to a telephone line which provides
digital subscriber line service for connection to
Internet.Internet.

6. Working of DSL Modem and Cable Modem

7. Speed Difference
DSL Cable
Downstream 1.5 – 15 mbps 25 – 100 mbps
Upstream 128 kbps – 1 mbps 2 mbps – 8 mbps

9. Wireless Modem or Mobile Broadband
Modem
A mobile broadband modem, also known as a connect card or
data card, is a type of modem that allows a laptop, a personal
computer or a router to receive Internet access via a mobile
broadband connection.
Mobile Broadband: Wireless internet access through a portableMobile Broadband: Wireless internet access through a portable
mode, usb wireless modem or other mobile devices.

10. Wireless Internet Access Provider
It is an Internet service provider with a network
based on wireless networking.