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Joined: Nov 2006
Posts: 264
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Member
Joined: Nov 2006
Posts: 264 |
Hello,
whar are the diferences ,if any, between the CSU and the NIU ?
Thanx a lot for your help
Lee
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Joined: Apr 2007
Posts: 1,439
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Joined: Apr 2007
Posts: 1,439 |
The NIU is the provider's demarc point of the circuit. The point they will test to when any troubles occur.
The CSU (if one is present) is a connection point between the NIU and the CPE (customer premise equipment, EI:router or PBX). The CSU can also be looped as a test point by the carrier.
Although most circuits will operate normally without a CSU it does provide a protection point between the demarc and the equipment.
Most CSU's are powered by local AC power so remember to include them in your battery back up/ups plans. the circuit will go down if the CSU loses power.
D
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