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Monday, September 7, 2009

CSU/DSU - Channel service unit / Data Service Unit

Try to Learn about this device, This is not commonly shown in CCNA Labs.

SU provides signal timing for communication and is used for interfacing with the digital transmission facility.
Essentially, the CSU/DSU is used by a router to connect to a digital line in much the same way that a PC uses a modem to connect to an analog line.
A CSU/DSU for T1 will typically provide:
Framing: ESF, D4(SF)
Line Coding: AMI, B8ZS
Cabling to Router: V.35, RS-232
(more on these later)
The CSU/DSU may also be built into the router. Like the card shown below.

1 comment:

Abdmeziane Abderrahmane said...

hey i hope you show us how to connecte csu/dsu withe the router in a pecture qnd how to configure it