Dail tone

Am using astrisk with chan_mobile when am calling to asterisk via sip cant hear dail tone for the first call than if i called again after few second i hear a dail tone . when trying again after min+ cant hear dail tone . is there any solution for that error . (am using (openvpn AS) with asterisk ) …

You will generally get a better response if you ask on a forum intended for providing peer support, rather than one for general discussion.

You will also get a better response if you provide relevant parts of your dialplan and other configuration, verbose logs, etc. You may need to go to debug level 5 and provide SIP and or m-ISDN protocol traces.