5.1 Serial Technology

2.Serial Technology

Serial Technology means Low Bandwidth | high cost | High coverage -> Preferred for WAN

High Coverage:

Amplitude of signal in serial technology is +12V or -12V.

It gives high coverage i.e. signal lost for long distance.

Low Bandwidth:

When amplitude of signal is more, coverage increase but frequency decreases, so eventually bandwidth decreases.

Point to Point:

It's Point to Point network.

Point to Point 

No MAc address required:

As it is point to point network it does not require physical/MAc address because destination is unique.

If 1--> +12 V
If 0--> -12 V

ISDN --> 64kbps--> 2 Mbps
T1--> 1.544 Mbps (US,JAPAN,CANADA)
E1--> 2.048 Mbps (Rest of world)