12-26-2011 12:39 AM - edited 03-16-2019 08:41 AM
In CUCM 7.1 setup, customer integrates third party IVR box with SIP trunk, communication between CUCM and IVR box working perfect including agent, supervisor and hunt group.
But when IVR try to transfer call to mobile phone, it goes as missed calls in mobile phone, landline call transfer from IVR is working perfect. Please let me the solution .
12-26-2011 01:49 AM
Could you confirm, if the voice gateway used to call Mobile phones ( GSM/CDMA ) is different than the voice gateway used to call Landlines ?
Can you provide a call flow diagram when the call is transferred from IVR to Mobile phones ? I.e. which components the call traverse through while it reaches the mobile phone over PSTN ?
GP.
12-26-2011 08:50 AM
Voice Gateway [ 2921 configured as MGCP, CUCM 7.1 ], Mobile Phone using GSM.
In third party IVR, when the customer selecting a particular option the call will be transfer to GSM number as missed call.
12-26-2011 10:09 PM
Bala,
My question is still unanswerred, therfore I wd still ask the same questions..
1. Could you confirm, if the voice gateway used to call Mobile phones ( GSM/CDMA ) is different router than the voice gateway router used to call Landlines ?
2. Can you provide a call flow diagram when the call is transferred from IVR to Mobile phones ? I.e. which components the call traverse through while it reaches the mobile phone over PSTN ? Following could be an example of call-flow diagram
e.g. IVR >> CUCM >> Gateway >> PRI/SIP Trunk >> Mobile user at PSTN
GP.
12-26-2011 10:38 PM
1) We are using one voice gateway, configured as MGCP the same voice gateway is configured to call GSM and Landline.
2) When customer chooses some option in IVR, the call should to transfer GSM or landline.
Call-flow diagram, third party IVR -> SIP trunk -> CUCM 7.1 -> MGCP gateway - ISDN PRI - mobile user.
Note - I had created CTI route point in CUCM - 7771; DN - 7771 call are forward to mobile number 922223333, when we call the CTI point [ 7771] form IP Phone the call is hitting the GSM normally, when the DN - 7771, call is initiate from IVR, the mobile get call as missed call. Land line call transfers are working perfect.
12-27-2011 05:10 AM
1. Does the call ( IVR transfer to Mobile ) get disconnected as soon as Mobile user answers the call ?
2. or does the call disconnect after ringing on Mobile for say 2 rings & thus leaves a missed call ?
If it's the case 1, then we should check Codec negotiation config for the call leg of IVR to Mobile user. Case 1 is perfect symptom of Codec issue, i.e. signalling goes well but call drops as codec is not negotiated properly.
Pls lemme know how it goes.
GP.
12-27-2011 09:33 PM
Our issuse is - call disconnect after ringing on Mobile for say one rings & thus leaves a missed call in mobile phone ?.
Please let me know workaround for this issuse.
12-29-2011 01:10 AM
Try enabling MTP for mobile calls. i.e. Check MTP required field.
GP.
12-29-2011 01:24 AM
We had checked MTP field, but same result, call get disconnected after one ring. But for Landline there is no problem, could you please light me more info related to troubleshoot.
12-29-2011 10:27 AM
I am receiving a similar issue. To answer the same questions:
CUCM Version 8
1. Could you confirm, if the voice gateway used to call Mobile phones ( GSM/CDMA ) is different router than the voice gateway router used to call Landlines ?
-Gateway being used for landlines is the same gateway being used for mobile calls.
2. Can you provide a call flow diagram when the call is transferred from?
PSTN -> Incomming call -> Gateway -> DN -> Call Forward All CSS -> Gateway -> PSTN
Call processing completes, but the call drops after a single ring. See below for a debug isdn q931 for call process. (Removed last 4 digits with X's)
*Dec 26 18:51:24.899: ISDN Se0/0/1:23 Q931: TX -> SETUP pd = 8 callref = 0x0013
Bearer Capability i = 0x8090A2
Standard = CCITT
Transfer Capability = Speech
Transfer Mode = Circuit
Transfer Rate = 64 kbit/s
Channel ID i = 0xA98397
Exclusive, Channel 23
Progress Ind i = 0x8283 - Origination address is non-ISDN
Calling Party Number i = 0x2183, '832444XXXX'
Plan:ISDN, Type:National
Called Party Number i = 0x80, '1936668XXXX'
Plan:Unknown, Type:Unknown
*Dec 26 18:51:24.931: ISDN Se0/0/1:23 Q931: RX <- STATUS pd = 8 callref = 0x0D25
Cause i = 0x80E018 - Mandatory information element missing
Call State i = 0x06
*Dec 26 18:51:24.991: ISDN Se0/0/1:23 Q931: RX <- CALL_PROC pd = 8 callref = 0x8013
Channel ID i = 0xA98397
Exclusive, Channel 23
*Dec 26 18:51:27.831: ISDN Se0/0/1:23 Q931: RX <- PROGRESS pd = 8 callref = 0x8013
Progress Ind i = 0x8288 - In-band info or appropriate now available
*Dec 26 18:51:27.835: ISDN Se0/0/1:23 Q931: TX -> PROGRESS pd = 8 callref = 0x8D25
Progress Ind i = 0x8288 - In-band info or appropriate now available
*Dec 26 18:51:27.871: ISDN Se0/0/1:23 Q931: RX <- STATUS pd = 8 callref = 0x0D25
Cause i = 0x80E503 - Message not compatible with call state
Call State i = 0x06
*Dec 26 18:51:28.791: ISDN Se0/0/1:23 Q931: RX <- RELEASE_COMP pd = 8 callref = 0x0D25
Cause i = 0x8092 - No user responding
*Dec 26 18:51:28.803: ISDN Se0/0/1:23 Q931: TX -> DISCONNECT pd = 8 callref = 0x0013
Cause i = 0x8092 - No user responding
*Dec 26 18:51:28.871: ISDN Se0/0/1:23 Q931: RX <- RELEASE pd = 8 callref = 0x8013
*Dec 26 18:51:28.903: ISDN Se0/0/1:23 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x0013
Let me know if you need any more information.
12-29-2011 09:12 PM
Yes we are facing the same issuse, please advice the solution.
12-29-2011 10:59 PM
You should negotiate signalling details with your telco. Ask them what IEs they awaiting.
Typicaly problems where some destination not working occurs when you send incorrect type/plan.
Sent from Cisco Technical Support iPad App
12-29-2011 11:48 PM
Now we are not sending dail plan type for called or calling number, we will try this also.
But when we called GSM number from Cisco - IP Phone the call is completed normally, when a GSM call is initiate from third party IVR box to cisco call manager via SIP trunk, the call is disconnected after one ring, Land line call transfer it works normal.
Call flow :
incoming call from PSTN->Cisco MGCP gateway E1 ->CUCM 7.1->SIP Trunk-> Third party IVR box -> for some option IVR need to transfer call to GSM via-> SIP trunk -> CUCM 7.1 -> Voice gateway - Mobile users. Mobile user call drops after one ring.
For IVR - land line call transfer there is no issuse, please light me more detail to troubleshoot this issuse further.
12-30-2011 12:02 AM
First compare debug isdn q931 for successful and failed call to one number. After you find what changes you can tune the SIP trunk.
Regards, Maxim
12-30-2011 12:22 AM
For failed call we are getting the error as "cause code - 0x82E6"
In ISDN we will mark numbering plan type and we will see the ISDN debug output, but I dont think because of plan type the call will drop by Telco.
for GSM, route pattern able to call from Cisco IP Phone normally, IVR also hitting the same GSM route pattern and goes as missed call.
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