[cisco-voip] E1 problems

[Philip Walenta]

If you're not receiving a call, I'd do a "debug isdn q921".  This shows the
basic ISDN communication.

Once that's done post the trace here and we can see what might be going on.
Also post a "show isdn service".

> -----Original Message-----
> From: cisco-voip-bounces at puck.nether.net 
> [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of 
> Ahmad Cheikh-Moussa
> Sent: Saturday, July 22, 2006 10:02 AM
> To: cisco-voip at puck.nether.net
> Subject: [cisco-voip] E1 problems
> 
> Hi!
> 
> I have a strange problem wth an E1.
> Since two days we have the behaviour that we can not receive 
> any calls on our E1 Pri. When I reset the interface the E1 
> works aproximately 4h without a problem. After that I can 
> establish outbound calls, but can not receive any calls from 
> outside (PSTN).
> I can not see any error on the e1 if. The show isdn status 
> command displays no errors.  When I enable "debug isdn q931" 
> I can not see my call. On the phone I got immediately a busy signal.
> It seems to me that the call never arrive on my gateway. 
> The provider tells me that he can not see any errors on his side.
> I changed the vwic module, the router, the IOS and the cable.
> Nothing of this could solve the problem.
> 
> Like I said before.
> The strange thing is outbound calls works all the time, 
> inbound calls after approximately 4h not. By resetting our 
> side or the provider side, everything works for a period of time fine.
> My guess is that there is a problem at the provider side, but 
> don't know how to prove this.
> 
> 
> I tried 3640 and 2821 router. 
> 1 x VWIC-1MFT-E1
> 1 x VWIC-2MFT-E1
> 1 x VIC2-2BRI-NT/TE=
> 
> On all of my tries, there was only one PRi and two BRI Ports
> used.
> 
> 
> Did anyone had a similar experience ?
> If yes, how did you solve it ?
> 
> 
> Regards,
>  Ahmad
> 
> 
> E1 1/0 is up.
>   Applique type is Channelized E1 - balanced
>   No alarms detected.
>   alarm-trigger is not set
>   Version info Firmware: 20051006, FPGA: 20, spm_count = 0
>   Framing is CRC4, Line Code is HDB3, Clock Source is Line.
>   CRC Threshold is 320. Reported from firmware  is 320.
>   Data in current interval (213 seconds elapsed):
>      0 Line Code Violations, 0 Path Code Violations
>      0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
>      0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 
> 0 Unavail Secs
> 
> 
> sh isdn status
> Global ISDN Switchtype = basic-net3
> ISDN Serial1/0:15 interface
>         dsl 0, interface ISDN Switchtype = primary-net5
>     Layer 1 Status:
>         ACTIVE
>     Layer 2 Status:
>         TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
>     Layer 3 Status:
>         0 Active Layer 3 Call(s)
>     Active dsl 0 CCBs = 0
>     The Free Channel Mask:  0x800F7FFF
>     Number of L2 Discards = 0, L2 Session ID = 6
> 
> 
> -- 
> Ahmad Cheikh-Moussa 
> NetUSE AG
> Dr.-Hell-Straße, 24107 Kiel, Germany
> Telefon: +49 431 2390 400 --  Telefax: +49 431 2390 499
> Service: Service at NetUSE.DE --  http://NetUSE.DE/
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