[nsp] Bad Bearercap: AS5300 to DEX-600E ISDN

Andrew Melton andy at meltons.net
Fri Nov 7 12:37:01 EST 2003

---------- Original Message ----------------------------------
From: "Vincent De Keyzer" <vincent at dekeyzer.net>
Date:  Fri, 7 Nov 2003 11:21:03 +0100

>I think this might not be bad at all. The bearer cap problem could just be
>that the AS5300 is not configured to accept "such" calls. 
>For instance, when I place test calls from a PRI on a router, I can get to
>call some mobile phones but not some others!... It has to be the right
Here's the sh isdn status:

ISDN Serial0:23 interface
        dsl 0, interface ISDN Switchtype = primary-dms100 : Primary D channel of nfas group 0
    Layer 1 Status:
    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:  0x807FFFFF
    Number of L2 Discards = 1, L2 Session ID = 224

I can make calls into the switch, however, they're not routing out.  The CDR says "no routing information in database".  I'm not sure if that's a problem with our route lists or whether it's unable to route due to a bearercap mismatch.

One thing I did accomplish, when I set the voice-port to 'isdn incoming-calls data/modem' calls to make it into the router, without the bearer cap error.  Problem is, the call isn't routed to the DSP farm or to the VoIP dial peer I have...

>combination of ISDN/voice/data etc., and both terminal equipments have to
>agree on those.
>Can you place outgoing calls? (try different mobile phones/ISDN lines/fixed
>phones, etc.)
>What does the 'sh isdn status' say for your Serial0?
>> I'm trying to connect an AS5300 to an Alcatel Megahub 600E.  
>> The 600E can only communicate as DMS-250 or ANSI T1.607.  We 
>> are using NFAS.
>> I have tried isdn switch-type primary-dms100, but on all 
>> calls from the 600E to the gateway, my q.931 debug says:
>> "Nov  5 17:35:14.282: ISDN Se0:23 **ERROR**: call_incoming: 
>> Received a call id 0x3D with a bad bearercap from 3103215708 
>> on b channel 12 Nov  5 17:35:14.286: ISDN Se0:23 Q931: TX -> 
>> RELEASE_COMP pd = 8  callref = 0x800C 
>>         Cause i = 0x80BA - Bearer capability not available"
>> I'm not sure what bearercap it's talking about.  Has anyone 
>> had success with ISDN PRI signaling between an AS5300 and 
>> Alcatel/DEC DEX600?
>> Any feedback would be helpful.  Thanks.
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