Its a classroom presentation for MBA Sem - 2 students in the subject area of Management Information Systems. The topic is overview of MODEM.

1. Guided by : Prof. D. B. Morvadia
Prepared by : Mihir Lodhia
Std. : MBA Sem II
Sub. : MIS
Institute : NRVIBMS, Junagadh, Guajrat, India

3.  A device performing the task of modulation and de-
modulation.
 Conversion of Digital (signal) to Analog (signal) is
called Modulation.
 Conversion of Analog (signal) to Digital (signal) is
called De-modulation.
 It simply stands for modulator-demodulator.
 Modems are available in different speed ranging from
300 to 600 bps and high speed modem ranging from
600 bps to 11 mbps.

5. (A) Internal Modem :-
 An integrated part of system cabinet.
 It’s a circuit board to be put inside CPU.
 Contains no lights as indicator of active device.
 Also called on-board modem
 Mainly of two types :
1) Dial-up :
2) Wi-Fi :

6. Merits of Internal Modem :
 Required less space on desk.
 Less expensive.
 Doesn’t require separate power supply.
 Problems of dust, humidity can be avoided.
Demerits of Internal Modem :
 Can not used for multi plugging task.
 Difficult to find problems when not working.
 Can not used for different computers.

7. Internal Modem
Internal Modem

8. (B) External Modem :-
 A separate device from the computer.
 A portable pocket sized device.
 It is connected to computer through cable.
 It has a separate power supply with an adapter and
a power code.
 It is connected to telephone line for internet
access.
 A light , antenna and plug-ins are available in it.

9. Merits of External Modem :
 Can use for more computer together.
 Problems of working can be found through power light
and network connectivity light.
 Wi-Fi faculties can also be availed.
 Problems of connection lost are not seen as cable is
connected.
Demerits of External Modem :
 Can require separate space to put on desk.
 Costly if single system operated.
 Problem of dust, humidity and Case break can be
happened

10. External Modem