05-17-2012 02:38 AM - edited 03-16-2019 11:12 AM
Hi,
we have Cisco phones with callmanager behind cisco ISDN to H.323 gateway. Calls placed
from outside dont hear busy tone. Inbound calls between phones works fine. Problem should
be on voice gateway. Do you have any ideas?
Close to our problem is described in
http://www.cisco.com/en/US/tech/tk652/tk653/technologies_tech_note09186a0080111b58.shtml
But it was no help. Any help appreciated.
In the included file is debug from debug isdn 921 and debug isdn 931.
call
from 667
to 221466370
is inbound call
call
from 605221474
to 667
is call from outside which doesnt hear busy tone
Solved! Go to Solution.
05-18-2012 04:18 AM
Jan,
I think your issue is being caused by the
voice application "name" which is running on your
dial peer voice 1 pots.
I am using the show run fron your post further up
To prove this can you add another dial peer
!
!
dial-peer voice 1111 pots
description *** FOR INCOMING DIAL PEER MATCHING ***
incoming called-number 70
direct-inward-dial
port 0/0/0:15
!
incoming called-number 70
Please correct this match the phone and gateway you are testing.
Try and restest
Regards,
Alex.
Please rate useful posts.
05-17-2012 06:22 AM
Jan,
Can you post the H323 router config.
Can you also look at the settings for the phone 667.
Look at the LINE and see what the value of the BUSY trigger is.
Regards,
Alex.
Please rate useful posts.
05-17-2012 06:35 AM
05-17-2012 03:58 PM
Jan,
Sorry for the delay.
The Trace file shows calls on s0/0/0:15 channels 30 and then 20
The config file shows that the valid channels only 1-12
!
controller E1 0/0/0
clock source line primary
pri-group timeslots 1-12,16
!
I cannot see how these files can be from the same router.
Regards,
Alex.
Please rate useful posts.
05-18-2012 02:42 AM
Thanks, you are right, because actually we have same problem on 2 gateways with similar configuration. Now I am posting debug session which happened on the gateway I posted configuration. First call is normal connected. Second call is not connected and should hear a busy tone but it doesnt work. I also post show voice call summary where first call is in state CONNECTED and second in PROCEEDING.
05-18-2012 02:58 AM
Jan,
If the busy trigger is set to 1, then you may need an annunciator to provide busy tone. Here is the detail from SRND..
I have removed some parts..
•Cisco IOS gateways and intercluster trunks
These devices require support for call progress tone (ringback tone).
•System messages
During the following call failure conditions, the system plays a streaming message to the end user:
–A dialed number that the system cannot recognize
–A call that is not routed due to a service disruption
–A number that is busy and not configured for preemption or call waiting
Do you have MRGL on the PSTN gateway? In your MRG, are there ANN in it?
Here is the SRND link..
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/8x/media.html#wp1046552
05-18-2012 03:22 AM
Jan,
You could also send debug voip ccapi inout. Thats where we will the PI(progress indicators)
05-18-2012 03:50 AM
We havent MRGL on gateway, so I set it and added annunciator to the list. But it didnt help. I note that ringback tone works fine. I am posting debug you mentioned. There are interesting lines
Progress Indication=NULL(0), Signal Indication=SIGNAL RINGBACK(1), Cause Value=0
Voice Call Send Alert=FALSE, Call Entry(Alert Sent=FALSE)
05-18-2012 04:00 AM
Jan,
Ok.. so Did you also assign the MRGL to the phones?
May 18 10:28:58.803: //146/16E684618027/CCAPI/ccCallDisconnect:
Cause Value=17, Tag=0x0, Call Entry(Previous Disconnect Cause=0, Disconnect Cause=17) May 18 10:28:58.803: //146/16E684618027/CCAPI/ccCallDisconnect:
Cause Value=17, Tag=0x0, Call Entry(Previous Disconnect Cause=0, Disconnect Cause=17)
Cause of 17 is because its "user busy" SO we are getting the right disconnect cause from the gateway.
Can you assign the MRGL to the phone and can you please send Detailed CUCM trace for the call if you can..
The thing is CUCM needs to send a busy tone to the PSTN. SO CUCM needs to inform the phone to send the busy tone, just as cucm informs the phone to ring by changing the call state on the phone. So we need to look at what CUCM is telling the phone to do when the call is busy
05-18-2012 04:18 AM
Jan,
I think your issue is being caused by the
voice application "name" which is running on your
dial peer voice 1 pots.
I am using the show run fron your post further up
To prove this can you add another dial peer
!
!
dial-peer voice 1111 pots
description *** FOR INCOMING DIAL PEER MATCHING ***
incoming called-number 70
direct-inward-dial
port 0/0/0:15
!
incoming called-number 70
Please correct this match the phone and gateway you are testing.
Try and restest
Regards,
Alex.
Please rate useful posts.
05-18-2012 05:12 AM
Yeah you are right! after configuring another dial peer it works. But I really dont understand it, what is the problem?
05-18-2012 05:49 AM
Jan,
Sounds like the script is causing some kind of contious hunting
I am not script man
However I would like you to try this
!
voice service voip
h323
no h225 alt-ep hunt user-busy
!
And put your dial peer back to normal
like no dial-peer voice 1111 pots
If you have left in in
Test with retry.
If this does not work then I suggest you raise a new post with a question something like
TCL script does not allow busy tone to PSTN callers
May be one of our TCL gurus can help.
Regards,
Alex.
Please rate useful posts.
05-18-2012 06:11 AM
01-19-2017 11:00 AM
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