Re: (PM) pri trouble
Doug Hardie (bc979@lafn.org)
Tue, 30 Mar 1999 13:52:59 -0800
At 1:00 PM -0800 3/30/99, Rob Genovesi wrote:
>Any idea where I should start trouble shooting this problem? :
>
>tsvr3>sh line1
>---------------------- line1 - T1 Primary Rate ISDN ---------------
>
> Status: UP Framing: ESF Encoding: B8ZS PCM: u-law
>
> Receive Level: +2dB to -7.5dB
>
> Alarms Violations
> ----------------------------- -----------------------------
> Blue 1 Bipolar 200508
> Yellow 2 CRC Errors 0
> Receive Carrier Loss 2 Multiframe Sync 737
> Loss of Sync 1
>
>
>
>This is a new PRI line from Pacific Bell, our second one. Our first PRI
>(line0) shows no violations. I assume calling PacBell and finding out
>about the line is the first logical step, but I was hoping to go after them
>with a little information on what might be the problem, since the first 4-5
>techs I always end up talking to don't know anything useful.
>
>
>
>Thanks,
>
> Rob Genovesi
> rob@coastside.net
>
>
>-
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Have them check the line levels on both lines. If they are in the same
bundle anyway along the line from the CO to you they must be at the same
level. If they are different you can expect crosstalk which can look like
what you are seeing. Mine did. The line levels need to be a 0 dbm for the
PMs to work properly. PacBell is very reluctant to setup their equipment
to that level.
-- Doug
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