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New Member

External calls fail from 7985


I have a customer with more than 100 phones working right, however they have 2 7985 phones that cannot call to external locations through their H323 GW.

At the beggining I thought the problem was the "bearer cap speech" because it was not configured, but I did it and still it doesn't work, I restarted the port and then the GW without any luck. I was searching at the CCM SDI traces and I found these messages that I'm attaching. Anyone does know what can be happening? Any help would be appreciated

Thanks in advance,

  • IP Telephony
Hall of Fame Super Gold

Re: External calls fail from 7985

Are you using ISDN ? If so take "debug isdn q931" with "term mon".

New Member

Re: External calls fail from 7985

Yes I'm using ISDN, and the message at the GW is "requested circuit/channel unavailable" although it's a free channel

I also have seen that if you forward all calls from that phone to an external number, it will work, but not for direct calls.

Here I am posting a part of the configuration, maybe it'll give you more idea about the problem:

controller E1 0/1/0

pri-group timeslots 1-30


interface Serial0/1/0:15

no ip address

encapsulation hdlc

no logging event link-status

isdn switch-type primary-qsig

isdn overlap-receiving

isdn incoming-voice voice

isdn negotiate-bchan

isdn bchan-number-order ascending

isdn sending-complete

no cdp enable


voice-port 0/1/0:15

cptone ES

bearer-cap Speech


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