[Users] Aggregating SIP devices

Hello everyone, I have multiple Asterisk systems registered to an OpenSER server. Each of them have several different SIP accessible extensions. Using alias_db (or something), I need to be able to create contacts that are reachable from the OpenSER server to individual extensions on each Asterisk system. For instance: SIP Phone -> Asterisk System -> OpenSER The SIP phone is registered to the Asterisk system and has an extension (100). The Asterisk System is registered to OpenSER and has a usrloc entry (asterisk). I would like to setup an alias like this: asterisk-100 This alias should be able to dynamically get the location of the Asterisk system from usrloc and reach that extension directly, basically forming a SIP uri like this: sip://100@[asterisk server ip address - loaded dynamically from usrloc] That way, if I were to do this: External SIP Phone -> OpenSER -> Asterisk System -> SIP Phone (ext 100) I could "dial" asterisk-100 from that External SIP phone and get connected to the Asterisk System at extension 100. This would be similar to the following (in Asterisk land): [sip-in] exten => asterisk-100,1,Dial(SIP/asterisk/100,20) exten => asterisk-100,2,Congestion(10) The most obvious way to do this is create multiple subscriber entries for each Asterisk system and one register => line for each entry in Asterisk. I would rather not have to do that!!! Is this clear enough? What do you think? Thanks! -- Kristian Kielhofner