Hello : This is my AS5300 DID(direct-inward-dial) configuration *********************************************** ! dial-peer voice 101 pots incoming called-number 41000.T no digit-strip direct-inward-dial port 1:D forward-digits all ! dial-peer voice 102 voip huntstop application session destination-pattern 41000.T rtp payload-type nte 98 voice-class codec 99 session protocol sipv2 session target sip-server dtmf-relay rtp-nte ! sip-ua retry invite 3 retry response 3 retry bye 3 retry cancel 3 timers expires 300000 timers connect 300 sip-server ipv4:10.0.0.1 ! **************************************************** I wanna call AS5300 to SER , I use "csim start [DID number]" command but it show this error message: csim err csimDisconnected recvd DISC cid(503) csim: loop = 1, failed = 1 csim: call attempted = 1, setup failed = 1, tone failed = 0 and I use " show call history voice " command I find that : DisconnectText=bearer capability not authorized (57) Do you see any other solution for this problem? Regards, Hunter