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Originally posted by ndt4u:
Thanks.I had seen all the numbers before but did not see how they fit together. There was a time when all T1's had a CSU. I never got a good answer as to why they were needed because we would by-pass them on trouble when they were bad and the switch would come up.
Unless something has changed they are a require interface. Some switches have a CSU built into their T-1 pack. I haven't put in a T-1 in a very long time so this requirement may have changed, but if so I haven't heard it did.


Retired phone dude