Here is a real puzzler.
I have installed a Cisco ONS 15454 V6.0 with a OC3 Protected and 42 DS1 in a 1:N protection. I have the 150 ft cable out of the UBIC connected to a Siemon patch panel RJ48. I have the punch down ring/ tip on 1 and 2 and ring/tip on 4 and 5. These are the TYCO cables.
The router when connected takes massive errors on the connection. The router is a cisco router and is a known working wic. I have also used a ADTRAN CSU/DSU.
When I hook the firebird to the RJ48, I see the same errors. Frame Loss and BPV.
I have pinned out the cable in all combinations. The TELCO can see the loop on the ONS, but can not loop up the CSU/DSU.