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<p class=MsoNormal><span style='color:#1F497D'>Hi Sechaba,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>I recall a while back seeing
this bug. This might be what you’re seeing: <a
href="http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCtf08864">http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCtf08864</a>
<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>If that doesn’t work go to the
bug toolkit and look up: CSCtf08864<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>What version of IOS are you
running?<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Thanks,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='color:#1F497D'>Tim </span></b><i><span
style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p></o:p></span></i></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
cisco-voip-bounces@puck.nether.net [mailto:cisco-voip-bounces@puck.nether.net] <b>On
Behalf Of </b>Sechaba Mokoena<br>
<b>Sent:</b> Monday, September 27, 2010 9:11 AM<br>
<b>To:</b> cisco-voip@puck.nether.net<br>
<b>Subject:</b> [cisco-voip] ISDN Layer 2 Problems<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:12.0pt;
font-family:"Times New Roman","serif"'>Hi,</span><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:</b><span
style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal>*Sep 21 09:19:13.851: ISDN BR0/3/1 Q921: User RX <-
IDCKRQ ri=0 ai=127<o:p></o:p></p>
<p class=MsoNormal>*Sep 21 09:19:13.851: ISDN BR0/3/1 Q921: User TX ->
IDCKRP ri=26021 ai=102<o:p></o:p></p>
<p class=MsoNormal>*Sep 21 09:19:13.859: ISDN BR0/3/1 Q921: User RX <- RRf
sapi=0 tei=102 nr=16<o:p></o:p></p>
<p class=MsoNormal>*Sep 21 09:19:14.851: ISDN BR0/3/1 Q921: User RX <-
IDCKRQ ri=0 ai=127<o:p></o:p></p>
<p class=MsoNormal>*Sep 21 09:19:14.851: ISDN BR0/3/1 Q921: User TX ->
IDCKRP ri=49142 ai=102<o:p></o:p></p>
<p class=MsoNormal>*Sep 21 09:19:15.879: ISDN BR0/3/1 Q921: User RX <- IDREM
ri=0 ai=102<o:p></o:p></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<o:p></o:p></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<o:p></o:p></p>
<p class=MsoNormal>*Sep 21 09:19:16.879: ISDN BR0/3/1 Q921: User RX <- IDREM
ri=0 ai=102<o:p></o:p></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><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<o:p></o:p></span></p>
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