[Asterisk-Dev] E1, crc-4 errors

[Konrad Gorski]

Hi Oliver,
My zaptel.conf:
span=1,1,0,ccs,hdb3,crc4
or, when crc on Telco-side switched off:
span=1,1,0,ccs,hdb3
and warnings are reported :(
Amount of warnings is dependent (as I see on * console) on activity of
eth0, ide0 etc - I'm not sure, it's first impression only :). 

> If it would help in debugging, I might be able to get some stats from
the > Meridian-side as well.
Yes, please.

Have you tested your E100P connected to E1 with CRC?

Pozdrowienia,
Konrad 

-----Original Message-----
From: asterisk-dev-admin at lists.digium.com
[mailto:asterisk-dev-admin at lists.digium.com] On Behalf Of The Traveller
Sent: Thursday, May 15, 2003 11:48 PM
To: asterisk-dev at lists.digium.com
Subject: Re: [Asterisk-Dev] E1, crc-4 errors

Yo Konrad,
 
After some more experimenting, I think I've found the solution.
 
In "/etc/zaptel.conf", I had:
 
span=1,0,0,ccs,hdb3
 
and have now replaced it by:
 
span=1,1,0,ccs,hdb3
 
As far as I understand, this instructs the drivers to use the other side
of the line as sync-source.  This seems to have made the warnings go
away
for me.
 
 
 
   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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> Asterisk-Dev at lists.digium.com
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