HI, I am using Vanlink voice gateway,with asterisk.Vanlink has 4 fxo and 4 fxs ports.Both vanlink and asterisk are in my local intranet. I am able to call from a sip phone to analog phones connected to FXS port of Vanlink Voice gateway.and able to make calls from analog phones to sip phones. But i am not able to make calls from a SIP(softphone) to my PBX. that is i am not able to get a dialtone of office pbx on my sip phone,while i am able to get pbx dialtone when i use phones that are connected to voice gateway's FXS port. So please help me Thanks and regards Bharat Samaria