So, I don't think this can be done, but it was given to me to find out so here goes.
Three sites, let's call them as follows
"Site A" DID range is "1112223333-4000"
"Site B" DID range is "4445556666-5000"
"Site C" DID range is "7778889999-6000"
All these sites have PSTN connections and they can all call each other fine. They are all connected via DMVPN so currently I have site codes set up that are as follows and using these site codes and the last 4 digits the call will go over the IP network and save the company come money, however this relies on the people to dial the site codes.
"Site A" #01
"Site B" #02
"Site C" #03
What I'm wondering is this. Is it possible to configure the gateways or the CUCM to see the a number in a range being dialed and automatically translate it to the site code + the last four digits so the call automatically goes over the IP network. There is one stipulation, the fax lines need to be excluded.
Any help would be great, if I haven't asked this correctly or if it's confusing at all please let me know.
I can't find the SRND dealing with this, do you have a link?
Also, are you sure you ca specify a range of DID's? Because one of the obvious issues is that if the dial pattern sees a number that is outside that range for instance 1112224001 it will try to send that over the IP network and fail. These are the little details that I'm thinking could through a monkey wrench into my plans.
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