Can anyone provide information regarding the "required" versus "desired" use of Scrambling on Subrate DS3'?
I am aware of the requirements for clocking recovery, but would expect that B3ZS coding would serve it's purpose.
At our Network Mgmt Center, we have a new (subrate, 15-Mbps, DSU Mode-1) DS3 that terminates in an ISP POP. This provides Internet connectivity to our internal customers.
We cannot monitor payload traffic on the DS3 interface; all we see is a "flat-line" of scrambled data at ~15-Mbps.
As a result of DS3 enabled scrambling on our Router's PA-T3+ interface, our WAN Protocol Analyzers cannot provide vital data (IP sessions, top-talkers, etc) with respect to troubleshooting other than Physical layer (framing, CRC, BPVs, etc) information. We have no desire to perform those same analysis functions from that same Router's drop side (Ethernet).
Thanks,
Chris