[Asterisk-Dev] E1, crc-4 errors

[The Traveller]

Yo Konrad,

I see very similar warnings from * on an E-1, connected through an E100P to
a Meridian-switch.  They seem to happen very infrequently and don't
seem to be causing any serious problems.  If it would help in debugging,
I might be able to get some stats from the Meridian-side as well.



    Grtz,

      Oliver

On Tue, May 13, 2003 at 16:47:42 +0200, Konrad Gorski wrote:

> Nearly 100% of errors (99,999%) at any time, regardless of activity on
> line. Please see attached log from Telco operator. In
> /var/log/asterisk/messages it report no alarms, but by any PRI
> connection:
> 
> May 13 15:29:03 WARNING[12301]: File chan_zap.c, Line 5314
> (zt_pri_error): PRI: Read on 67 failed: Unknown error 500;
> 
> This kind of WARNING was few times reported on mailing list - w/o
> answers/explanations (?).
> 
> E1 line w/o alarms, E100P LED green, zttool: No alarms, IRQ Misses:0, ..
> Make it sense experiment with switchtype?
> Till now switchtype=euroisdn.
> Telco use Lucent 5ESS, so I will try switchtype=5ess. 
> 
> Konrad
> 
> 
> -----Original Message-----
> From: asterisk-dev-admin at lists.digium.com
> [mailto:asterisk-dev-admin at lists.digium.com] On Behalf Of Mark Spencer
> Sent: Monday, May 12, 2003 3:21 PM
> To: asterisk-dev at lists.digium.com
> Subject: RE: [Asterisk-Dev] E1, crc-4 errors
> 
> > Load < 3%. IRQ - OK. E1 line and cabling - OK: Asterisk on this line
> > works well as my office PBX. CRC errors are on Telco side only. I've
> > tested E1 line with another PBX (TELRAD) - 0% CRC errors on Telco
> > side.
> 
> CRC4 calculations are made within the framer itself.  How many errors do
> you get?  Do they show up at particular time intervals?  In your
> /var/log/asterisk/messages does it report the line going into alarm?
> 
> Mark
> 
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