Kumba:
Ifthe LEC replaced a T1 Regen, more than likely if that did clear your trouble, it is an indication of a possible fault condition in the LEC's receive into the switch. Unless a protocol analyzer were placed on the PRI circuit to monitor Q.931 call set up protocol messages between your switch, and the LEC (Call failures or link SABM message), you will more than likely not see any T1 PM events on your end.
NDT4U:
Beginning in December 1989, the FCC under part 68 ruled that LEC's (Telco) will not span power customer T1 CSU equipment from the T1 span line. The exception to this rule applies to those T1's in place prior to the FCC rule change. ANSI T1.403 incorporates this requirement.
All new T1 NIU's deployed in Bell Atlantic as of 1998, now Verizon, do not pass any t1 span voltages to the customer side of the T1 NIU. If a T1 NIU installed at your location has a DB9 serial connector, and is made by ADA, Teltrend, or Westell, then thatis a NIU.
Units made by Pairgain/ADC, and Adtran are not NIU's but HDSL Remote units or HTU-R's. Older 4W (Gray color) Adtran HTU-R remotes have a slide switch to provide T1 span power towards the CPE.
I had the span powering option removed from all new vintage T1 NIU's, and HDSL HTU-R modules deployed by Bell Atlantic/Verizon beginning in 1998 & 2000 when I was a member of the Transmission Engineering staff.
Field Ops
