Depending on your carrier they may be able to give the 911 database a physical address based upon a specific block of DIDs. Say you have DID range 212-555-2000 through 2199 some carriers can say calls originating with outbound caller ID of 2000-2099 are at physical address number 1 and calls with CID from 2100-2199 are at location number 2. It is really dependant on the installers to know this if you invoke so that a DID out of the desired range is not used at the wrong location.


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