The MON(itor) Bantom plug on the T1/PRI module only connects to the receive pair on the RJ-45 interface. With that being said, you can only use it to monitor the Rx traffic on the T1 interface.
I don’t believe you want to do this, but if you use the DEDICATED MAP to map one T1 port to another, you could then monitor the receive path on each, where the receive on one port should be the transmit on the other
Hope this helps,
Thanks. That makes sense. Though it does not let me see both sides of of the D-channel of a PRI that is being switched by the Atlas Dial Plan. I guess I need to keep my DSX in the picture to do that.