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Transferencia y conferencia de llamadas en Intercluster call manager

Reciban un cordial saludo desde  caracas,venezuela. Realizo  una consulta a este  foro y es acerca de la posibilidad de  poder realizar transferencia de llamadas y conferencias  cuando se  establece  un trunk intercluster entre 2 call manager de diferentes  versiones en subredes diferentes.
versiones de los call manager.

* System version: 5.1.3.6000-2
*System version: 8.5.1.10000-26

actualmente en la red telefonica de la institución donde  laboro, existen dos servidores  call manager entre ellos se  configuró un trunk  de esta manera:  INTER-CLUSTER TRUNK (NON-GATEKEEPER CONTROLLED), también se configuró un route pattern con un prefijo especifico para   evitar el choque de extensiones entre ambos servidores.

esta configuración funciona correctamente, pues  entre ambos servidores es psoible realizar  y recibir  llamadas  correctamente.

el unico problema existente, consiste en que no es posible realizar  transferencias y/o conferencias entre ambos servidores usando el trunk antes  mencionado.

se  realizó prueba creando un trunk SIP,  el cual también funciona correctamente entre ambos servidores, pero tampoco permite hacer transferencias  ni conferencias.

agradezco el apoyo en este sentido de algun colaborador que posea información al respecto o quizá saber  si estas opciones o funciones  no son posibles con el troncal activo.

saludos cordiales
******************************************* English************************************************************************
receive a warm greeting from Caracas, Venezuela. Has consulted this forum and is about the possibility to make call transfer and conference intercluster trunk when a call manager from 2 different versions on different subnets is established.
versions of the call manager.

* System version: 5.1.3.6000-2
* System version: 8.5.1.10000-26

currently in the telephone network of the institution where I work, there are two call manager servers including a trunk in this way was configured: INTER-CLUSTER TRUNK (NON-GATEKEEPER CONTROLLED), a route pattern with a specific prefix is ​​also configured to prevent shock extensions between the two servers.

this configuration works correctly, because between the two servers is Possible days to make and receive calls correctly.

the only existing problem is that it is not possible transfers and / or conferences between the two servers using the aforementioned trunk.

test was performed by creating a SIP trunk, which also works correctly between servers, but also allows transfers or conferences.

I appreciate the support in this respect of any contributor who has information about or perhaps whether these options or functions are not possible with the active trunk.

best regards
Everyone's tags (4)
2 ACCEPTED SOLUTIONS

Accepted Solutions
Cisco Employee

So if I understand you

So if I understand you correctly, transfer and conference calls works fine when you create a SIP Trunk between both the CM clusters. However, if there is an ICT then normal calls work fine but as soon as you try to do a transfer or conference it fails. Couple of questions I have:

1) Do the transfer/conference calls fail when it originates from a particular CM cluster or does it not matter and fails from both the clusters no matter which originated the call

2) You are trying to do the conference/transfer within the same cluster where the call actually originated or across the other cluster. In case, you are trying to do it in the other cluster what happen if you do it in the same cluster

3) Do you have MTP option checked on the ICT or not. If yes, then try unchecking it followed by a reset of the ICT and then try or vice versa

Regards

Deepak

Cisco Employee

Glad that the issue had been

Glad that the issue had been resolved Jose. Please mark the thread as Answered if there are no further questions on the topic.

Regards

Deepak

4 REPLIES 4
Cisco Employee

So if I understand you

So if I understand you correctly, transfer and conference calls works fine when you create a SIP Trunk between both the CM clusters. However, if there is an ICT then normal calls work fine but as soon as you try to do a transfer or conference it fails. Couple of questions I have:

1) Do the transfer/conference calls fail when it originates from a particular CM cluster or does it not matter and fails from both the clusters no matter which originated the call

2) You are trying to do the conference/transfer within the same cluster where the call actually originated or across the other cluster. In case, you are trying to do it in the other cluster what happen if you do it in the same cluster

3) Do you have MTP option checked on the ICT or not. If yes, then try unchecking it followed by a reset of the ICT and then try or vice versa

Regards

Deepak

thanks, As Deepak advised , I

thanks, As Deepak advised , I put to unchecked in the Media termination point (mtp) and was succesful. in addition, between the clusters, had an firewall, and is possible that was affecting this service. now is possible to transfers and conference between the clusters.

Cisco Employee

Glad that the issue had been

Glad that the issue had been resolved Jose. Please mark the thread as Answered if there are no further questions on the topic.

Regards

Deepak

TJ Cisco Employee
Cisco Employee

Call Flow:

Call Flow:

Phone A -- Cluster A -- ICT -- Cluster B -- Phone B

1) Does the call gets disconnected as soon as Phone A/B presses conf/transfer?
2) Which way does the transfer/conference not work?

As Deepak advised, reset the trunk after checking/unchecking MTP.

Regards

TJ

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