CallManagers Trunk Calls

[alshahiry]

How I can establish a trunk calls between main CallManager at HQ and several CallManagers at remotes? Shall I go with SIP or H323 trunk type, advise? Any special configuration required?

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[yahsiel2004]

The easiest would be to create inter cluster trunks (non-gatekeeper controlled) to each site or you can create a hub and spoke connection where the HQ connects to all sites and each site only connects to the HQ to reach the other sites.

Regards,

Yosh

[islam.kamal]

Dear

You have two scinarios fist one through gatekeer(centralized) other intercluster without gatekeeper conntrolled (Distributed) , For example if we use gatekeeper and all calls will go using gatekeeper ( but this is not recommended in your case) , Intercluster using gatekeeper (h323) when you have in your HQ Call manager server and a CME in your branches.

http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/4_0_1/ccmsys/a08trnk.html tis is helpfull link.In your case I recommend Intercluster non-gatekeeper controlled.Please find attached file , it will help you.

Please rate , if this is helpfull

Thank you

[Chris Deren]

What version of CUCM are you running on both sides?

If they are relatively new i.e. 7.X or newer definitely use SIP trunks as that is Cisco's recommendation (see SRND), if one of the sides is older version use non-GK controlled trunk.

HTH,

Chris