Greetings, I'm hoping someone can help me out here. I'm relatively new to FS, but not to general telephony and I have a small amount of SIP experience. My FS installation is, so far, a fairly straightforward PBX setup with a single SIP trunk with 21 DIDs to the ITSP that I work at. I have everything working as far as inbound and outbound calls, except that in order for me to use a DID as the outbound caller id, that DID needs to be explicitly registered with the ITSP, and not just the pilot number for the SIP trunk. When I try to create a second gateway *.xml file to register a second DID, I get an error "Registration Failed with status Operation has no matching challenge [904]" on the FS console. As I mentioned, I work at this ITSP and I program similar SIP trunks into Adtran TA9xx boxes for SIP over T1 deliveries. On the Adtrans, I'm able to define a single SIP trunk, and have multiple register statements within that trunk, one for each DID. I'm wondering if there's a way to do something similar in FS. I'm running a very recent (I update from the GIT tree about twice a week) version of FS on a Debian Linux OS, and, I have several local extensions working and able to call in and out; I just want to be able to outpulse various DIDs as my caller-id without getting calls rejected. Here's a copy of my gateway .xml file, with relevant information changed: <include> <gateway name="gatewayname"> <!--/// account username *required* ///--> <param name="username" value="1234567890"/> <!--/// auth realm: *optional* same as gateway name, if blank ///--> <!--<param name="realm" value="asterlink.com"/>--> <!--/// username to use in from: *optional* same as username, if blank ///--> <!--<param name="from-user" value="cluecon"/>--> <!--/// domain to use in from: *optional* same as realm, if blank ///--> <param name="from-domain" value="gatewayname"/> <!--/// account password *required* ///--> <param name="password" value="XXXXXXXX"/> <!--/// extension for inbound calls: *optional* same as username, if blank ///--> <!--<param name="extension" value="cluecon"/>--> <!--/// proxy host: *optional* same as realm, if blank ///--> <param name="proxy" value="proxyname"/> <!--/// send register to this proxy: *optional* same as proxy, if blank ///--> <!--<param name="register-proxy" value="mysbc.com"/>--> <!--/// expire in seconds: *optional* 3600, if blank ///--> <!--<param name="expire-seconds" value="60"/>--> <!--/// do not register ///--> <param name="register" value="true"/> <!-- which transport to use for register --> <!--<param name="register-transport" value="tcp"/>--> <!--How many seconds before a retry when a failure or timeout occurs --> <!--<param name="retry-seconds" value="30"/>--> <!--Use the callerid of an inbound call in the from field on outbound calls via this gateway --> <param name="caller-id-in-from" value="true"/> <!--extra sip params to send in the contact--> <!--<param name="contact-params" value="tport=tcp"/>--> <!--send an options ping every x seconds, failure will unregister and/or mark it down--> <param name="ping" value="30"/> <param name="extension-in-contact" value="true"/> </gateway> </include> Again, I don't know if I would do it here (I would assume so) but I'm wondering if there's some way (maybe multiple "extension" statements? I dunno..) to register multiple DIDs in the same gateway / SIP trunk. Thanks!