[Asterisk-Users] sipphone dialing out problem

[Deepakumar JV]

Hello   when i dial a toll free no using sipphone i get this error message. How do i solve this?   Any help will be appreciated.     console message:   Starting simple switch on 'Zap/2-1'     -- Executing SetCallerID("Zap/2-1", "17473863282") in new stack     -- Executing SetCIDName("Zap/2-1", "Deepak JV") in new stack     -- Executing Dial("Zap/2-1", "SIP/[EMAIL PROTECTED]") in new stack     -- Called [EMAIL PROTECTED]     -- SIP/proxy01.sipphone.com-8efc is making progress passing it to Zap/2-1     -- SIP/proxy01.sipphone.com-8efc answered Zap/2-1 Feb  3 22:15:57 NOTICE[1218901440]: channel.c:1481 ast_set_read_format: Unable to find a path from G729A to ULAW Feb  3 22:15:57 NOTICE[1218901440]: channel.c:1451 ast_set_write_format: Unable to find a path from ULAW to G729A Feb  3 22:15:57 WARNING[1218901440]: chan_zap.c:3728 zt_write: Cannot handle frames in 256 format   == Spawn extension (internal, 18006526672, 3) exited non-zero on 'Zap/2-1'     -- Hungup 'Zap/2-1'   Regards Deepak