Re: (PM) Need help with PM-3 (fwd)

Eric Calvert (eric@caveland.net)
Tue, 13 Jan 1998 15:37:38 -0600

Alex Rubenstein wrote:
>
> > > > Blue 0 Bipolar 17821655
> > > > Yellow 12686 CRC Errors 3108611
> > > > Receive Carrier Loss 0 Multiframe Sync 3996
> > > > Loss of Sync 484
> > > >
> > > >Why are there so many errors? Is this normal? The system uptime is as
> > >
> > > >Livingston PortMaster PM-3 ComOS 3.7.2
> > > >System uptime is 14 days 1 hours 47 minutes
>
> >
> > > Just what does the telco claim could possibly be causing it on our part?
> >
> > Modems. According to them, if it is their fault, I should be seeing all
> > channels drop at the same time. Since I routinely lose one customer at
> > a time, they claim that it must be the modems.
>
> Best bet is to never let the telco in on the 'secrets' (ie, modems).
> Simply tell them that your T1 span (that carries the PRI) is in trouble;

Remember this is CT1, and not PRI.

> you are getting a lot of BPV's, and it is going in and out of yellow.
>
> Don't say anything else.
>

They already knew.

Here is the latest info. I rebooted the box a while ago, and it now
shows:

Command> show line1
---------------------- line1 - T1 Inband DS0 ---------------

Status: UP Framing: D4 Encoding: AMI PCM: u-law

Signaling: Trunk E&M immediate start

Receive Level: +2dB to -7.5dB

Alarms Violations
----------------------------- -----------------------------
Blue 0 Bipolar 98269
Yellow 6 CRC Errors 3433
Receive Carrier Loss 0 Multiframe Sync 524
Loss of Sync 4

Command> version
Livingston PortMaster PM-3 ComOS 3.7.2
System uptime is 3 hours 33 minutes

Can the Bipolar violations seem to jump up dramatically every once in a
while. It keeps going up, but it is not a steady count. I can check
it 3 or 4 times within 5 minutes and it will never change. Come back
30 minutes later and it has increased a lot. What do bipolar violations
indicate? Would that (or any of these other errors) correlate to
individual users getting dropped? I've been told that the yellow alarms
will cause ALL users to get dropped at the same time.

-- 
Eric Calvert
Caveland Connection
http://www.caveland.net
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