I have an issue where I can call into the PRI 23 times and get the same results everytime. The results are that sometimes I call into the system and get solid 2 way communication, in the No good category I get no ring backtones or audio from behind the PRI, though they can hear me. Check out the sequence below. I can repeat this time after time. Is it my NM or Teleco. I have the NM-HDV-2T1, and I already swapped from S1/0 to an unused S1/1. NG.
Call #1 No Good,
#2-11 Good, #12-16 NG, #17-20 Good, #21 NG, #22-23 Good.