I am still trying to figure out the nature of uplink. Sometimes I think it is a specialized SIP server that SIP clients like Express Talk and others can register with and then make calls. The presence of the Axon PBX confuses me. I recently bought a ZyXel P2000W WiFI SIP phone, hoping that I could get it to register either with Uplink or with Axon virtual PBX. When I try to register it as an extension, the Axon does not announce in its log window that the registration has occured. I was hoping I could bypass the Axon altogether and just register the phone with Uplink. Anyone got any ideas?