last tries with Oktell SIP-GSM, works fine with huawei E153 and Freeswitch. on Oktell setup to make it work i use Router Mode settings SIP account is a basic extension setup default port i use for SIP server 5060 nd local port 5070 outbound-proxy check As a SIP server Default SIP-Number (the extension number you wish to receive the incoming calls when in gateway mode) CallerID Send Caller ID nd Send in "From" default GSM number blank (it's used when in gateway mode) Codecs : 1 G.711Ulaw 2 G.711Alaw 3 G.729 4 GSM 610 additional setting DTMF type RFC2833 to dial out ring the extension , wait the tonality , dial and it's done i didn't try yet the gateway mode. else i wonder if i can make a lua script for dialing. P.S: about gsmopen com port and how to find them on Oktell SIP-GSM you can find log files between the modem and the computer to have the right adresses but still doesnt work on GSMOPEN Cordialy -- View this message in context: http://freeswitch-users.2379917.n2.nabble.com/troubles-with-Mod-gsmopen-and-... Sent from the freeswitch-users mailing list archive at Nabble.com.