I am trying to setup a customer who wanted to utilize the airespring national did presence, where in they rewrite the Caller ID of outbound calls. In order to do this tho, they say I need to send a blank caller id. FreeSWITCH will send 0000000000 if the caller id is not specified. Airespring wants something formatted like INVITE sip:jungar@alpha-org.com SIP/2.0 Via: SIP/2.0/UDP zetamachine.beta-org.com:5060;branch=as82je8ei4kr Max-Forwards: 70 To: 2556112121 <sip:jungar@alpha-org.com> From: <sip:jsmith@beta-org.com>;tag=13456 Call-ID: @zetamachine.beta-org.com with the From: field looking like any of the following From: <sip:jsmith@beta-org.com>;tag=13456 From: < @208.76.54.59>;tag=13456 From: @208.76.54.59;tag=13456 The closest I got was to make FreeSWITCH to the following, but airespring won't budge. Can anyone tell me how to make the From string as airespring wants for their national DID presence service. Thanks. From: "" <sip:0000000000@208.76.54.59>;tag=UyNBXjyUUay8m