I am attempting to transfer a number that comes in on an FXO port back out the same port. The service has 3 way calling and transfer and these options are specified in zapata.conf . Some config... zapata.conf ------------ [channels] ; context=incoming signalling=fxs_ks echocancel=yes echocancelwhenbridged=yes relaxdtmf=yes rxgain=1.5 txgain=1.5 immediate=no busydetect=yes callprogress=no musiconhold=default usecallerid=yes callerid=asreceived transfer=yes threewaycalling=yes group=2 channel => 4 [incoming] exten => s,1,Answer exten => s,2,Dial(Zap/4,12565554455) I would assume the system would: answer the incoming call flash to the second line dial the number flash back to a three way call hang up However in the asterisk console I only get Sep 9 01:49:09 ERROR[87056]: callerid.c:193 callerid_feed: fsk_serie made mylen < 0 (-11) Sep 9 01:49:09 WARNING[87056]: chan_zap.c:5110 ss_thread: CallerID feed failed: Success Sep 9 01:49:09 WARNING[87056]: chan_zap.c:5152 ss_thread: CallerID returned with error on channel 'Zap/4-1' Sep 9 01:49:09 NOTICE[87056]: app_dial.c:715 dial_exec: Unable to create channel of type 'Zap' Is this possible?