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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.








The CSU/D
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
Multiplexing
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
thanks