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<tt><b>I have a cisco 2811 (CME, running 12.4(11)T) with one vic2-2bri
connected with a Alcatel 4400 .<br>
BRI port is configured as following:</b><br>
<br>
<font color="#000066"><i><font color="#000099">interface BRI0/1/0<br>
no ip address<br>
isdn switch-type basic-qsig<br>
isdn timer T310 120000<br>
isdn overlap-receiving<br>
isdn protocol-emulate network<br>
isdn point-to-point-setup<br>
isdn layer1-emulate network<br>
isdn incoming-voice voice<br>
isdn static-tei 0<br>
isdn skipsend-idverify<br>
!<br>
<br>
!<br>
voice-port 0/1/0<br>
compand-type a-law<br>
timeouts interdigit 5<br>
bearer-cap </font>Speech</i></font><br>
!<br>
<br>
<b>Sometimes, during a call through that port, the call gets
disconnected with the following message (<font color="#ff0000">marked
red</font>):</b><br>
<br>
<br>
<font color="#000099">*Feb 6 10:55:17.949: ISDN BR0/1/0 Q931: RX <-
SETUP pd = 8 callref = 0x0026 <br>
Sending Complete <br>
Bearer Capability i = 0x8090A3 <br>
Standard = CCITT <br>
Transfer Capability = Speech <br>
Transfer Mode = Circuit <br>
Transfer Rate = 64 kbit/s <br>
Channel ID i = 0xA18382 <br>
Preferred, Channel 2 <br>
Progress Ind i = 0x8083 - Origination address is non-ISDN <br>
Progress Ind i = 0xA090 - Reserved value <br>
Calling Party Number i = 0x0181, '2310803800' <br>
Plan:ISDN, Type:Unknown <br>
Called Party Number i = 0x80, '999' <br>
Plan:Unknown, Type:Unknown <br>
High Layer Compat i = 0x9181 <br>
Locking Shift to Codeset 5 <br>
Codeset 5 IE 0x32 i = 0x80<br>
*Feb 6 10:55:17.969: ISDN BR0/1/0 Q931: TX -> CALL_PROC pd = 8
callref = 0x8026 <br>
Channel ID i = 0xA98382 <br>
Exclusive, Channel 2<br>
*Feb 6 10:55:17.993: ISDN BR0/1/0 Q931: TX -> ALERTING pd = 8
callref = 0x8026<br>
*Feb 6 10:55:24.701: ISDN BR0/1/0 Q931: TX -> CONNECT pd = 8
callref = 0x8026 <br>
Channel ID i = 0xA98382 <br>
Exclusive, Channel 2 <br>
Connected Number i = 0x80, '999'<br>
*Feb 6 10:55:24.765: ISDN BR0/1/0 Q931: RX <- CONNECT_ACK pd = 8
callref = 0x0026<br>
*Feb 6 10:56:31.977: ISDN BR0/1/0 **ERROR**: L2_AdvanceVA:
TX_ack_queue empty<br>
</font><font color="#000099"><font color="#ff0000">*Feb 6
11:08:07.312: %ISDN-6-LAYER2DOWN: Layer 2 for Interface BR0/1/0, TEI 0
changed to down<br>
*Feb 6 11:08:07.312: ISDN BR0/1/0 Q931: Ux_DLRelInd: DL_REL_IND
received from L2</font><br>
*Feb 6 11:08:20.568: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/1/0,
TEI 0 changed to up<br>
*Feb 6 11:09:19.177: ISDN BR0/1/0 Q931: RX <- DISCONNECT pd = 8
callref = 0x0026 <br>
Cause i = 0x809080 - Normal call clearing<br>
*Feb 6 11:09:19.177: ISDN BR0/1/0 **ERROR**: L3_BadPeerMsg: event 0x45
cr 0x8026 callid 0x0<br>
*Feb 6 11:09:19.181: ISDN BR0/1/0 Q931: TX -> RELEASE_COMP pd = 8
callref = 0x8026 <br>
Cause i = 0x80D1 - Invalid call reference value<br>
*Feb 6 11:13:49.722: ISDN BR0/1/0 **ERROR**: L2_AdvanceVA:
TX_ack_queue empty<br>
voicegw#</font><br>
<br>
<b>when i turned q921 debug i saw that:<br>
at some point, cisco sends a SABME message for multiple frame establish
(why?).<br>
If the router gets a reply:</b> </tt><tt><font color="#ff0000">RX
<- UAf sapi=0 tei=0 <b><font color="#000000">the call does not fail</font></b>
(see debugging) <font color="#000000"><b>and so RRp and RRf continue:</b></font><br>
</font></tt><tt><br>
<font color="#000099">*Feb 6 12:26:00.165: ISDN BR0/1/0 Q921: Net TX
-> RRf sapi=0 tei=0 nr=0</font><br>
<font color="#ff0000">*Feb 6 12:26:01.089: ISDN BR0/1/0 Q921:
L2_EstablishDataLink: sending SABME</font><br>
<font color="#000099">*Feb 6 12:26:01.089: ISDN BR0/1/0 Q921: Net TX
-> SABMEp sapi=0 tei=0<br>
*Feb 6 12:26:01.185: ISDN BR0/1/0 Q921: Net RX <- SABMEp sapi=0
tei=0<br>
*Feb 6 12:26:01.185: ISDN BR0/1/0 Q921: Net TX -> UAf sapi=0 tei=0<br>
*Feb 6 12:26:02.089: ISDN BR0/1/0 Q921: Net TX -> SABMEp sapi=0
tei=0<br>
*Feb 6 12:26:02.205: ISDN BR0/1/0 Q921: Net RX <- SABMEp sapi=0
tei=0<br>
*Feb 6 12:26:02.205: ISDN BR0/1/0 Q921: Net TX -> UAf sapi=0 tei=0<br>
*Feb 6 12:26:03.089: ISDN BR0/1/0 Q921: Net TX -> SABMEp sapi=0
tei=0</font><br>
<font color="#ff0000">*Feb 6 12:26:03.101: ISDN BR0/1/0 Q921: Net RX
<- UAf sapi=0 tei=0</font><br>
<font color="#000099">*Feb 6 12:26:03.221: ISDN BR0/1/0 Q921: Net RX
<- SABMEp sapi=0 tei=0<br>
*Feb 6 12:26:03.225: ISDN BR0/1/0 Q921: Net TX -> UAf sapi=0 tei=0<br>
*Feb 6 12:26:13.225: ISDN BR0/1/0 Q921: Net TX -> RRp sapi=0 tei=0
nr=0<br>
*Feb 6 12:26:13.237: ISDN BR0/1/0 Q921: Net RX <- RRf sapi=0 tei=0
nr=0<br>
*Feb 6 12:26:23.237: ISDN BR0/1/0 Q921: Net TX -> RRp sapi=0 tei=0
nr=0<br>
*Feb 6 12:26:23.241: ISDN BR0/1/0 Q921: Net RX <- RRp sapi=0 tei=0
nr=0</font><br>
<br>
<b>if it gets no reply, the router (or alcatel?) drops L2 TEI 0, and so
the call is dropped</b> (<font color="#ff0000">see debugging of a
dropped call)<br>
</font><br>
<font color="#ff0000">*Feb 6 12:30:19.570: ISDN BR0/1/0 Q921:
L2_EstablishDataLink: sending SABME</font><br>
<font color="#000099">*Feb 6 12:30:19.570: ISDN BR0/1/0 Q921: Net TX
-> SABMEp sapi=0 tei=0<br>
*Feb 6 12:30:19.658: ISDN BR0/1/0 Q921: Net RX <- SABMEp sapi=0
tei=0<br>
*Feb 6 12:30:19.658: ISDN BR0/1/0 Q921: Net TX -> UAf sapi=0 tei=0<br>
*Feb 6 12:30:20.570: ISDN BR0/1/0 Q921: Net TX -> SABMEp sapi=0
tei=0<br>
*Feb 6 12:30:20.678: ISDN BR0/1/0 Q921: Net RX <- SABMEp sapi=0
tei=0<br>
*Feb 6 12:30:20.678: ISDN BR0/1/0 Q921: Net TX -> UAf sapi=0 tei=0<br>
*Feb 6 12:30:21.570: ISDN BR0/1/0 Q921: Net TX -> SABMEp sapi=0
tei=0<br>
*Feb 6 12:30:21.698: ISDN BR0/1/0 Q921: Net RX <- SABMEp sapi=0
tei=0<br>
*Feb 6 12:30:21.698: ISDN BR0/1/0 Q921: Net TX -> UAf sapi=0 tei=0<br>
*Feb 6 12:30:22.570: ISDN BR0/1/0 Q921: Net TX -> SABMEp sapi=0
tei=0<br>
*Feb 6 12:30:22.718: ISDN BR0/1/0 Q921: Net RX <- SABMEp sapi=0
tei=0<br>
*Feb 6 12:30:22.718: ISDN BR0/1/0 Q921: Net TX -> UAf sapi=0 tei=0<br>
<font color="#ff0000">*Feb 6 12:30:23.570: %ISDN-6-LAYER2DOWN: Layer 2
for Interface BR0/1/0, TEI 0 changed to down<br>
*Feb 6 12:30:23.570: ISDN BR0/1/0 Q931: Ux_DLRelInd: DL_REL_IND
received from L2</font><br>
*Feb 6 12:30:23.574: ISDN BR0/1/0 Q921: Net TX -> IDCKRQ ri=0 ai=0<br>
*Feb 6 12:30:23.590: ISDN BR0/1/0 Q921: Net RX <- IDCKRP ri=0 ai=0<br>
*Feb 6 12:30:58.734: ISDN BR0/1/0 Q921: Net RX <- SABMEp sapi=0
tei=0<br>
*Feb 6 12:30:58.734: ISDN BR0/1/0 Q921: S4_SABME: Sending UA<br>
*Feb 6 12:30:58.734: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0/1/0,
TEI 0 changed to up<br>
*Feb 6 12:30:58.734: ISDN BR0/1/0 Q921: Net TX -> UAf sapi=0 tei=0<br>
*Feb 6 12:30:58.790: ISDN BR0/1/0 Q921: Net RX <- INFO sapi=0
tei=0, ns=0 nr=0<br>
<br>
<font color="#000000"><b>Is there any possible idea why is this
happening? In monday, i have a rendez-vous with the man who configured
alcatel. Is there anything i can do till then?<br>
Why the negotiation of multiple frame begins? Isn't multiple frame
established since is point-to-point?<br>
Since it gets established, why the router tries again?<br>
And why sometimes alcatel does not reply?<br>
I think i am going mad. That's why i don't like qsig and old PBXs
interconnections with voip!!!<br>
<br>
Thanks<br>
Anthony</b><br>
</font></font></tt>
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