[Freeswitch-users] Using an Empty FROM field for SIP Messages

Matthew Fong mattdfong at gmail.com
Wed Feb 9 12:55:55 MSK 2011

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 at 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 at alpha-org.com>

From: <sip:jsmith at beta-org.com>;tag=13456

Call-ID: @zetamachine.beta-org.com

with the From: field looking like any of the following

From: <sip:jsmith at beta-org.com>;tag=13456
From: <  @>;tag=13456
From:  @;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 at>;tag=UyNBXjyUUay8m
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