Hi,<br><br>I'm dropping calls on ISDN BRI lines. I'm running a 2911 router with VIC2-2BRI-NT/TE cards and I'm dropping calls intermittenlty. I have captured the following debug output while running <b>debug isdn q921:<br>
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<p class="MsoNormal">*Sep 21 09:19:13.851: ISDN BR0/3/1 Q921: User RX <-
IDCKRQ ri=0 ai=127</p>
<p class="MsoNormal">*Sep 21 09:19:13.851: ISDN BR0/3/1 Q921: User TX ->
IDCKRP ri=26021 ai=102</p>
<p class="MsoNormal">*Sep 21 09:19:13.859: ISDN BR0/3/1 Q921: User RX <- RRf
sapi=0 tei=102 nr=16</p>
<p class="MsoNormal">*Sep 21 09:19:14.851: ISDN BR0/3/1 Q921: User RX <-
IDCKRQ ri=0 ai=127</p>
<p class="MsoNormal">*Sep 21 09:19:14.851: ISDN BR0/3/1 Q921: User TX ->
IDCKRP ri=49142 ai=102</p>
<p class="MsoNormal">*Sep 21 09:19:15.879: ISDN BR0/3/1 Q921: User RX <- IDREM
ri=0 ai=102</p>
<p class="MsoNormal">*Sep 21 09:19:15.879: %ISDN-6-LAYER2DOWN: Layer 2 for
Interface BRI0/3/1, TEI 102 changed to down</p>
<p class="MsoNormal">*Sep 21 09:19:15.879: %ISDN-6-DISCONNECT: Interface
BRI0/3/1:1 disconnected from unknown , call lasted 111 seconds</p>
<p class="MsoNormal">*Sep 21 09:19:16.879: ISDN BR0/3/1 Q921: User RX <- IDREM
ri=0 ai=102</p>
<br><br>When Layer 2 drops, my calls drop. I'm pretty sure that this problems lies with the Telco, but they tell me that their lines test fine. I have sent the debug output to a specialist within the Telco and I'm awaiting feedback. My BRI config on the router is as follows:<br>
<br>interface BRI0/2/0<br> no ip address<br> isdn switch-type basic-net3<br> isdn overlap-receiving<br> isdn tei-negotiation preserve<br> isdn point-to-point-setup<br> isdn incoming-voice voice<br> isdn send-alerting<br> isdn sending-complete<br>
! <br>voice-port 0/2/0<br> compand-type a-law<br> cptone ZA<br> bearer-cap Speech<br>!<br>dial-peer voice 1 voip<br> description Incoming Calls<br> destination-pattern 83..<br> progress_ind setup enable 3<br> session target ipv4:10.42.2.240<br>
incoming called-number .T<br> dtmf-relay h245-alphanumeric<br> ip qos dscp cs3 signaling<br> no vad <br>! <br>dial-peer voice 2 pots<br> tone ringback alert-no-PI<br> description PSTN Calls<br> destination-pattern 0T<br>
incoming called-number .T<br> direct-inward-dial<br> port 0/2/0<br> forward-digits all<br><br>Am I right in saying that this is Telco related. Please note that I have also upgraded the IOS just to rule it out.<br><br>Kind regards,<br>
<br>Sechaba Mokoena<br>