I have been working on getting FXS attached devices to be able to make calls (mostly faxing) from a remote site thru our corporate PRI. I have setup the GW in CUCM as H.323 and given it a CSS of "PSTNGateway_CSS" which contains my Internal_PT, VM_Pilot_PT, and Blocked_PT. I have found that I am not able to make outbound calls from FXS connected devices since I do not have any external patterns in those partitions which would be tied to a route list.
My question is:
What is the best practice for H.323 GW configurations in CUCM when you have an FXS card in the router?
Generally, the best practice for a GW is to only give it access to internal patterns (extensions or pilots) so as not to risk toll fraud. However, that is counter productive when you have FXS ports that need to be able to dial the outside world.
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