(PM) PM3 Troubles

Lee Verberne (master@net-2000.net)
Thu, 28 May 1998 09:17:43 -0500 (CDT)

I'm having trouble with my PM3 and I am attempting to track down exactly
what is causing the problem. The problem is that the PM3 keeps losing
sync on it's PRI, and knocking every user off. Normally I would check the
PRI immediately, but its twin PRI is running smoothly on a different PM3.

The PM3 in question has only 1 PRI plugged into line0.

Livingston PortMaster PM-3 ComOS 3.7.2
System uptime is 14 minutes

PM3-2> sho line1
---------------------- line1 - T1 Primary Rate ISDN ---------------

Status: DOWN Framing: ESF Encoding: B8ZS PCM: u-law

Receive Level: less than -22.5dB

Alarms Violations
----------------------------- -----------------------------
Blue 0 Bipolar 44
Yellow 0 CRC Errors 0
*Receive Carrier Loss 1 Multiframe Sync 265330
*Loss of Sync 1

is it normal to have so many errors on a line that isn't even there?

line0 had 48 Losses of Sync before I finally rebooted it.

This particular PM3 has been flakey since I got it. Its kernel was
corrupted twice and I had to netboot and reinstall ComOS. In an effort to
fix things last time, Lucent Tech Support installed ComOS 3.8 beta
something. None of our customers with a USR modem could connect, so I
went back to 3.7.2.

any ideas?

Lee Verberne
Ayrix Technologies, Inc.

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