The document discusses modems, which function to modulate and demodulate signals, converting digital to analog and vice versa. It compares internal and external modems in terms of their characteristics, merits, and demerits, highlighting factors like space, cost, and usability. Internal modems are integrated into the system and save space, while external modems offer portability and multiple computer connections.

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