[Asterisk-Dev] PRI Error with EWSD Switch

Alfred Certain dreampbx at gecko-soft.com
Mon Jul 19 14:12:42 MST 2004


We are looking for someone using Asterisk and PRI (E100P Cards) with EWSD

Currently we have the follow error on a Production Asterisk System (Recent CVS):

Jul  1 15:40:37 NOTICE[90123]: chan_zap.c:6872 pri_dchannel: PRI got event: 8 on
Primary D-channel of span 1

This is NOT a timming or slip error because we allready tested it with special
equipment, We even made some tests with an ISDN Tester and we have some traces
for the curious one.

At the same time you see the ERROR you can hear some CLICK's and POP's on the
call, but eventually all B channels are dropped and calls losted.

After the tests we believe the following is happening:

1-EWSD Public Switch send a message asterisk doesn't understand (PACKAGE TOO
LARGE says the PRI-Intense Debug).
2-Asterisk sends a RESTART CHANNEL message to EWSD Switch
3-EWSD sends a RESTART ACK message to asterisk (and all calls are dropped)

Already tested: Cables, E100P card (we tested four dfts cards), Server (Dell
PowerEdge 600SC and HP Proliant ML100), CVS Source Code (Several versions),
Timming (all options), Asterisk Switchtype (EuroISDN is the best one and the
PSTN uses EuroISDN version 5).

Any idea? Anyone experienced this kind of problem before?


Alfred Certain 
Gecko Software 
An asterisk based IP-PBX 

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