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2821, ISDN BRI, Swisscom

pavelsh_ucs
Level 1
Level 1

<p>Hello!<br />

<br />

I can't setup h.323 gateway.<br />

Explain.<br />

I have cisco 2821.<br />

I have got an ISDN BRI line from swisscom.<br />

I've setup cisco. But when I try to call to PSTN (and otherwise) I get an error. I can't fix this error. Please help!<br />

<br />

interface BRI0/1/0<br />

 no ip address<br />

 isdn switch-type basic-net3<br />

 isdn overlap-receiving T302 3000<br />

 isdn point-to-point-setup<br />

 isdn layer1-emulate network<br />

 isdn spid1 0<br />

 isdn spid2 0<br />

 isdn incoming-voice voice<br />

 isdn calling-number 6722010<br />

 isdn send-alerting<br />

 trunk-group ISDN<br />

<br />

voice-port 0/1/0<br />

 disc_pi_off<br />

 no vad<br />

 compand-type a-law<br />

 cptone CH<br />

<br />

dial-peer voice 102 pots<br />

 trunkgroup ISDN<br />

 tone ringback alert-no-PI<br />

 translation-profile outgoing OUT00<br />

 preference 1<br />

 destination-pattern 0T<br />

 forward-digits all<br />

!<br />

dial-peer voice 203 voip<br />

 description ToCCM-Swiss<br />

 huntstop<br />

 destination-pattern 411..<br />

 modem passthrough nse codec g711ulaw<br />

 voice-class codec 1<br />

 voice-class h323 1<br />

 session target ipv4:10.255.252.5<br />

 dtmf-relay h245-alphanumeric<br />

 fax rate disable<br />

 no vad<br />

<br />

#sh isdn status<br />

Global ISDN Switchtype = basic-net3<br />

ISDN BRI0/1/0 interface<br />

        dsl 2, interface ISDN Switchtype = basic-net3<br />

    Layer 1 Status:<br />

        ACTIVE<br />

    Layer 2 Status:<br />

        TEI = 69, Ces = 1, SAPI = 0, State = TEI_ASSIGNED<br />

    Layer 3 Status:<br />

        0 Active Layer 3 Call(s)<br />

    Active dsl 2 CCBs = 0<br />

    The Free Channel Mask:  0x80000003<br />

 <br />

<br />

I have got an error:<br />

*Feb  1 01:21:23.598: %ISDN-6-DISCONNECT: Interface BRI0/1/0:1  disconnected from 0074957832977 , call lasted 11 seconds<br />

*Feb  1 01:21:23.602: ISDN BR0/1/0 Q931: TX -> DISCONNECT pd = 8  callref = 0x49<br />

        Cause i = 0x80AF - Resource unavailable, unspecified<br />

*Feb  1 01:21:24.374: ISDN BR0/1/0 Q931: RX <- FACILITY pd = 8  callref = 0xC9<br />

        Facility i = 0x91A11B020200810201213012A10D810346522EA206810114820101820100<br />

             Protocol Profile = Remote Operations Protocol</p>

1 Accepted Solution

Accepted Solutions

From the way the disconnect message is sent - I'm guessing you get cause code 47 from the H323 side.  It looks like you're getting error unavailable from whatever your H323 endpoint is.

If it's CUCM - check your codec settings for the gateway vs. the DN.  If the regions specify codecs or if there are any transfers involved check transcoder availability and making your codec selection g729 or g711 all the way through.  May also want to check 'show voice dsp group all' for allocation errors (last line).

It appears that when the call connects you disconnect.  This is the tell-tale sign of a codec negotiation problem.  Look into your H323 endpoint, and 'debug h225 asn1' and 'debug h245 asn1' for details.  Make sure you're getting a RELEASE_COMPLETE or Close Logical Channel from the H323 endpoint and not vice versa.

hth,

nick

View solution in original post

4 Replies 4

paolo bevilacqua
Hall of Fame
Hall of Fame

Can you please remove the following, and include the complete trace.

 isdn overlap-receiving T302 3000

 isdn point-to-point-setup

 isdn layer1-emulate network

 isdn spid1 0

 isdn spid2 0

Lines removed.

Trace was attached.

 :)

Attachment Keywords : 1) swiss-trace-to-pstn.txt

From the way the disconnect message is sent - I'm guessing you get cause code 47 from the H323 side.  It looks like you're getting error unavailable from whatever your H323 endpoint is.

If it's CUCM - check your codec settings for the gateway vs. the DN.  If the regions specify codecs or if there are any transfers involved check transcoder availability and making your codec selection g729 or g711 all the way through.  May also want to check 'show voice dsp group all' for allocation errors (last line).

It appears that when the call connects you disconnect.  This is the tell-tale sign of a codec negotiation problem.  Look into your H323 endpoint, and 'debug h225 asn1' and 'debug h245 asn1' for details.  Make sure you're getting a RELEASE_COMPLETE or Close Logical Channel from the H323 endpoint and not vice versa.

hth,

nick

Yes. You are right. I doesn't setup h323-gateway source address

Call was disconnected because rtp stream can't start.

Thank you!