This might be a pretty easy question, but it is giving me a hard time. The issue I am having is I have 5 Digit extensions that begin with 43 and 44. I can put 43 as a technology prefix and my trunk will register to the gatekeeper and calls work fine to the extension that begin with 43, but not to ones that begin with 44. However it does not seem like it is possible to add a range (ie 4) or have only a 1 Digit prefix (ie 4) in the technology prefix field. The Call Manager does not like the range and the gatekeeper does not like one digit. Any suggestions would be appreciated.
A technology prefix is an optional H.323 standard-based feature, supported by Cisco gateways and gatekeepers, that enables more flexibility in call routing within an H.323 VoIP network. The Cisco gatekeeper uses technology prefixes to group endpoints of the same type together. Technology prefixes can also be used to identify a type, class, or pool of gateways.
Cisco gatekeepers use technology prefixes to route calls when there is no E.164 addresses registered (by a gateway) that matches the called number. In fact, this is a common scenario because most Cisco IOS gateways only register their H.323 ID (unless they have Foreign Exchange Station (FXS) ports configured). Without E.164 addresses registered, the Cisco gatekeeper relies on two options to make the call routing decision:
With the Technology Prefix Matches option, the Cisco gatekeeper uses the technology prefix appended in the called number to select the destination gateway or zone.
With the Default Technology Prefixes option, the Cisco gatekeeper assigns default gateway(s) for routing unresolved call addresses. This assignment is based on the gateways' registered technology prefix.
We have CME's and PBX's around the world that are currently registered to a gatekeeper. We are now trying add a Call Manager Cluster to that network. 5 Digits Outgoing from the Call Manager seems to be working fine. However the issue is when other users call into the Call Manager Cluster the only calls I can get to work are calls that begin with 43. The reason is because I setup the technology prefix on the trunk in Call Manager to be 43. The 43 then registers to the gatekeeper and incoming calls to the Call Manager start working. Is there a better way to set this up?
Thanks alot, that was what I was looking for, just something to get me started down the correct path. However since now I have been reading more docs about this, in particular, on connecting the CME's to UCM it looks like the way that is recommended is not via a gatekeeper but through inter-cluster trunks.
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