Hi, Config VMIC card on 3660 to connect with PBX. First I want to do a loopback connection which is phone go to PBX then to 3660 then back to PBX to another phone. But has problem. ! voice-card 2 codec complexity high ! ip subnet-zero no ip domain-lookup ! ip audit notify log ip audit po max-events 100 isdn voice-call-failure 0 ! ! ! ! controller T1 2/0 linecode b8zs ds0-group 0 timeslots 3 type e&m-wink-start ds0-group 1 timeslots 1 type e&m-wink-start description voice ! ! voice-port 2/0:1 ! voice-port 2/0:0 operation 4-wire signal immediate ! ! dial-peer voice 1 pots destination-pattern 1604918.... port 2/0:0 no register e164 ! dial-peer voice 2 pots shutdown destination-pattern 4... direct-inward-dial port 2/0:1 prefix 4 no register e164 ! dial-peer voice 3 voip session target ipv4:20.0.0.2 ! num-exp 4... 16049184... -- David WU [EMAIL PROTECTED] ___________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]