H323 Setup message

Answered Question
Aug 30th, 2010
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Hi,


In the CUCM cluster enviornment from which node H323 setup message  will initiate ?


1) cucm in gateway device pool call manager group ?


2) Cucm node where the ip phones are registred ?


Thanks

Correct Answer by Jaime Valencia about 6 years 10 months ago

This is nicely discussed in the SRND.


For the initiation of outbound calls over an H.323 trunk, the following  key factors within a Unified CM cluster determine which server is  selected:

Which Unified CM servers have an active  H.323 daemon for the selected trunk

Whether the phone originating the call  is registered to a Unified CM server with an active H.323 daemon for the  selected trunk

For IP trunks, the server selection process is not as intuitive as it is  for H.323 connections to gateways where, for example, route lists and  route groups can be used to select the gateway(s) used to originate the  call to the PSTN and also to provide call distribution among multiple  gateways. While the route list and route group process still operates  for trunk selection and call distribution, a second process is also in  operation to select the server from which the H.323 call will originate.  In other words, after the route list and route group configuration  selects the outgoing trunk, one server in the Unified CM Group for the  selected trunk must be chosen to originate the H.323 call.


For all IP trunks, this process of server selection for outgoing calls  is as follows:

If there is an active H.323 daemon for  the selected trunk on the Unified CM server to which the phone or device  originating the call is registered (that is, if the server is one of  those listed in the trunk's Unified CM Group), then use this Unified CM  server to originate the H.323 call.

If there is no active H.323 daemon for  the selected trunk on the Unified CM server to which the phone or device  originating the call is registered, then select a server on a  round-robin basis from the Unified CM Group of the selected trunk.


http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/8x/trunks.html


HTH


java


If this helps, please rate


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philip.e.denton Mon, 08/30/2010 - 07:37
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I believe the message will originate with the node where the phone is registered (and this should correlate to the CM Group setting in Device Pool).

Felipe Garrido Mon, 08/30/2010 - 11:35
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The messages will originate from the CUCM node that the route list is registered with.


-Felipe

Correct Answer
Jaime Valencia Mon, 08/30/2010 - 15:01
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This is nicely discussed in the SRND.


For the initiation of outbound calls over an H.323 trunk, the following  key factors within a Unified CM cluster determine which server is  selected:

Which Unified CM servers have an active  H.323 daemon for the selected trunk

Whether the phone originating the call  is registered to a Unified CM server with an active H.323 daemon for the  selected trunk

For IP trunks, the server selection process is not as intuitive as it is  for H.323 connections to gateways where, for example, route lists and  route groups can be used to select the gateway(s) used to originate the  call to the PSTN and also to provide call distribution among multiple  gateways. While the route list and route group process still operates  for trunk selection and call distribution, a second process is also in  operation to select the server from which the H.323 call will originate.  In other words, after the route list and route group configuration  selects the outgoing trunk, one server in the Unified CM Group for the  selected trunk must be chosen to originate the H.323 call.


For all IP trunks, this process of server selection for outgoing calls  is as follows:

If there is an active H.323 daemon for  the selected trunk on the Unified CM server to which the phone or device  originating the call is registered (that is, if the server is one of  those listed in the trunk's Unified CM Group), then use this Unified CM  server to originate the H.323 call.

If there is no active H.323 daemon for  the selected trunk on the Unified CM server to which the phone or device  originating the call is registered, then select a server on a  round-robin basis from the Unified CM Group of the selected trunk.


http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/8x/trunks.html


HTH


java


If this helps, please rate


www.cisco.com/go/pdihelpdesk

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