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Engager

Unable to make calls via new BRI interface

I have a 2901, with a VIC2-2BRI-NT/TE. This is configured via MGCP to a CUCM 8.0.3 system.

I am unable to make or recieve calls on this BRI interface.

Debug isdn q921 shows:

Apr 13 12:42:30: ISDN BR0/0/0 Q921: User TX -> IDREQ ri=41585 ai=127
Apr 13 12:42:32: ISDN BR0/0/0 Q921: User TX -> IDREQ ri=51586 ai=127
Apr 13 12:42:38: ISDN BR0/0/0 Q921: User TX -> IDREQ ri=24995 ai=127

When an inbound call is attempted, I get

Apr 13 12:43:16: ISDN BR0/0/0 Q921: User RX <- SABMEp sapi=0 tei=0
Apr 13 12:43:17: ISDN BR0/0/0 Q921: User RX <- SABMEp sapi=0 tei=0
Apr 13 12:43:18: ISDN BR0/0/0 Q921: User TX -> IDREQ ri=45583 ai=127
Apr 13 12:43:18: ISDN BR0/0/0 Q921: User RX <- SABMEp sapi=0 tei=0
Apr 13 12:43:19: ISDN BR0/0/0 Q921: User RX <- SABMEp sapi=0 tei=0
Apr 13 12:43:20: ISDN BR0/0/0 Q921: User TX -> IDREQ ri=54016 ai=127
Apr 13 12:43:22: ISDN BR0/0/0 Q921: User TX -> IDREQ ri=769 ai=127

but no call.

sh isdn status shows:

dev-gw1#sh isdn sta
Global ISDN Switchtype = basic-net3

%Q.931 is backhauled to CCM MANAGER 0x0003 on DSL 0. Layer 3 output may not apply

ISDN BRI0/0/0 interface
    dsl 0, interface ISDN Switchtype = basic-net3
    L2 Protocol = Q.921 0x0000  L3 Protocol(s) = CCM MANAGER 0x0003
    Layer 1 Status:
    ACTIVE
    Layer 2 Status:
    Layer 2 NOT Activated
    Layer 3 Status:
    0 Active Layer 3 Call(s)
    Active dsl 0 CCBs = 0
    The Free Channel Mask:  0x80000003

From googling, it appears that this is a TEI configuration issue.

In CUCM, my TEI parameters are:

TEI Negotiation: FirstCall

TEI Preservation: Reserve

TEI Mode: Dynamic

I'm in the UK. Are my TEI parameters wrong, or is there something else wrong ?

Thanks,

GTG

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1 ACCEPTED SOLUTION

Accepted Solutions
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Participant

Gordon,

     I cannot remember using to control a BRI in the UK, but I would expect the CuCM to be setup like:-

TEI MODE: Static

TEI: 0

Let me know how you get on,

Craig

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3 REPLIES 3
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Participant

Gordon,

     I cannot remember using to control a BRI in the UK, but I would expect the CuCM to be setup like:-

TEI MODE: Static

TEI: 0

Let me know how you get on,

Craig

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Doh ! That's it.

Ta,

GTG

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Glad to help, thanks for the update.

Have a good day,

Craig