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Cisco UC520 CME 8.6 ISDN BRI line to SIP extension (generic third party softphone)

Peter K.
Level 1
Level 1

Dear Members!

 

 

I have an issue with the following setup:

 

ISDN BRI line -> CME -> SIP softphone

 

I can make outgoing calls over the ISDN BRI line using the softphone, no problem at all except a little latency...

But when I terminate an incoming call from ISDN BRI port to a SIP extension then the sip phone rings (so all the translation rules are fine) but as soon as I pick up the call on the sip softphone the line disconnects, on the ISDN q931 I see the following:

000263: Jun 6 22:24:00.446: ISDN BR0/1/0 Q931: TX -> CALL_PROC pd = 8 callref = 0x81
Channel ID i = 0x89
Exclusive, B1
000264: Jun 6 22:24:01.446: ISDN BR0/1/0 Q931: TX -> CALL_PROC pd = 8 callref = 0x81
Channel ID i = 0x89
Exclusive, B1
000265: Jun 6 22:24:01.462: ISDN BR0/1/0 Q931: TX -> ALERTING pd = 8 callref = 0x81
000266: Jun 6 22:24:07.018: ISDN BR0/1/0 Q931: TX -> CONNECT pd = 8 callref = 0x81
Channel ID i = 0x89
Exclusive, B1
000267: Jun 6 22:24:07.122: ISDN BR0/1/0 Q931: RX <- CONNECT_ACK pd = 8 callref = 0x01
000268: Jun 6 22:24:07.126: ISDN BR0/1/0 Q931: TX -> DISCONNECT pd = 8 callref = 0x81
Cause i = 0x8090 - Normal call clearing
000269: Jun 6 22:24:07.134: ISDN BR0/1/0 Q931: RX <- RELEASE pd = 8 callref = 0x01
Cause i = 0x829A - Non-selected user clearing
000270: Jun 6 22:24:07.142: ISDN BR0/1/0 Q931: RX <- RELEASE pd = 8 callref = 0x01
Cause i = 0x829A - Non-selected user clearing
000271: Jun 6 22:24:07.254: ISDN BR0/1/0 Q931: RX <- RELEASE pd = 8 callref = 0x01
000272: Jun 6 22:24:07.258: ISDN BR0/1/0 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x81

 

 

The call disconnection says:

Cause i = 0x8090 - Normal call clearing

 

 

So I'm quite sure that the CME blocks the call somehow... on the sip softphone side I receive a timer expired event  with the BYE message so I already added:

voice service voip

ip address trusted list
ipv4 192.168.0.0 255.255.255.0
ipv4 0.0.0.0 0.0.0.0

allow-connections sip to sip

sip
min-se 1200 session-expires 1200
registrar server expires max 3600 min 3600
no update-callerid
early-offer forced
no call service stop

 

 

Is there also a way to have an option like allow-connection isdn to sip ? :)))) 

 

 

 



 

2 Replies 2

R0g22
Cisco Employee
Cisco Employee
Interesting. We need to see what is happening at the SIP leg. Take a log for the following -

debug ccsip message
debug ccsip error
debug voice ccapi inout
debug isdn q931

Hello, 

 

please find the attached log to this comment. 

 

So what I did:

I made a call from my mobile (3670XXXX) to the ISDN incoming number 827370. 

 

it is clearly seen that after the sip client (sip extension num,ber: 1010) rings, then the call is  accepted (ACK message received), the ISDN leg disconnects....

 

Can you tell me what happens on the CCAPI level ??