Any attenuators involved?? I've actually experienced the same thing before and traced it back to what we believed to be a bad attenuator. Replaced it and LOS cleared right up. I only mention it because the Adtran MUX that was in use at that facility didn't have a way to dial down the DB's.
On Tue, Jan 18, 2011 at 11:52 AM, Jay Hennigan <[email protected]> wrote: > We got an alarm that a T3 to a customer was down. PE router showed > interface up, line protocol down. CE router showed down/down. Provider > side goes to an Adtran Opti-mux out OC-12 to Verizon, customer end is a > Verizon mux on premise. > > Called Vz and they claimed it was CPE, they saw "idle loop" towards our > 7206 CE router. We shut/no-shut the interface and rebooted the 7206, no > joy. I'm not familiar with the term "idle loop", we were showing > receive LOS and sending RAI. > > Customer IT guy came on site and saw CLOS on Verizon mux, alarm light on > 7206. He disconnected the cable and put a coax loop towards the 7206. > Interface came up-looped right away. > > Reconnected to Verizon mux and everything came back up nice and happy. > That's what is bugging me. Circuit has been running fine for months. > > > -- > -- > Jay Hennigan - CCIE #7880 - Network Engineering - [email protected] > Impulse Internet Service - http://www.impulse.net/ > Your local telephone and internet company - 805 884-6323 - WB6RDV > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
