RE: (PM) E-bit violations

James Courtier-Dutton (dutton@livingston-ent.co.uk)
Mon, 29 Mar 1999 17:24:09 +0100

Hello Mark
Major Telco problems, E-Bit is CRC errors in the User->Network Direction.
To many of these and you will start getting clock slip.
This then causes bipolar errors.
Ask you telco to Bert test the line.
Cheers
James

> -----Original Message-----
> From: owner-portmaster-users@livingston.com
> [mailto:owner-portmaster-users@livingston.com]On Behalf Of Mark O'Leary
> Sent: Monday, March 29, 1999 04:59
> To: portmaster-users@livingston.com
> Subject: (PM) E-bit violations
>
>
> Anyone seen anything like this?
>
> Over the past weekend, our E-bit violations have gone from 0 to
> 1864 - this
> on a E1 PRI:
>
> portmaster1> sh line0
> ---------------------- line0 - E1 Primary Rate ISDN ---------------
>
> Status: UP F1 Framing: CRC4 Encoding: HDB3 PCM: a-law
>
>
> Violations
> -----------------------------
> Bipolar 1702
> CRC4 6
> E-bit 1857
> FAS bit 0
>
> Livingston PortMaster PM-3 ComOS 3.8.2
> System uptime is 84 days 2 hours 22 minutes
>
> Is 2000 of these high over a 2 day period? (we've never had any before!)
>
> This weekend has simultaeniously seen lots of user reports of *two*
> phonecalls being required to connected to the PM3 - the first gets either
> dead air or an engaged tone, the second, immediately afterwards, gets
> through fine.
>
> I'm presuming that the two are related and that some telco config
> change/problem is affecting our users - but what might be the cause? Can
> anyone recommend what I might ask then to look at? (in the past, they've
> said "can't replicate the problem" and closed the trouble ticket...)
>
> I'm loathe to reboot the pm3 until such troubleshooting as is possible has
> been done against it...
>
> M.
>
> --
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> =-=-=-=-=-=
> Mark O'Leary, | Voice: +44 (0161) 2756110
> Network Support Officer, | Email: Mark.O'Leary@mcc.ac.uk
> Manchester Computing, UK | or: mark@mcc.ac.uk
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