-- Executing Dial("SIP/69-efcf", "Zap/1/9651559526") in new stack
Apr 12 12:51:37 DEBUG[5237]: chan_zap.c:1645 zt_call: Dialing '9651559526'
Apr 12 12:51:37 DEBUG[5237]: chan_zap.c:1706 zt_call: Deferring dialing...
    -- Called 1/9651559526
Apr 12 12:51:38 DEBUG[5237]: chan_zap.c:3770 __zt_exception: Exception on 15, channel 1
Apr 12 12:51:38 DEBUG[5237]: chan_zap.c:3082 zt_handle_event: Got event Hook Transition Complete(12) on channel 1 (index 0)
Apr 12 12:51:40 DEBUG[5237]: chan_zap.c:3770 __zt_exception: Exception on 15, channel 1
Apr 12 12:51:40 DEBUG[5237]: chan_zap.c:3082 zt_handle_event: Got event Dial Complete(9) on channel 1 (index 0)
Apr 12 12:51:40 DEBUG[5237]: chan_zap.c:1224 zt_enable_ec: Enabled echo cancellation on channel 1
Apr 12 12:51:40 DEBUG[5237]: channel.c:1363 ast_read: Dropping duplicate answer!
    -- Zap/1-1 answered SIP/69-efcf