I have FreeSWITCH Version 1.2.22~32bit ( 32bit) on Centos 5.9 In directory /usr/src/freeswitch-1.2.22/libs/esl/perl is script dispatch.pl I changed it to see CUSTOM events and spandsp::rxfaxpageresult subclass events, but heither CUSTOM events hor spandsp::rxfaxpageresult subclass not captured. #!/usr/bin/perl use ESL::Dispatch; use Data::Dumper; my $daemon = init ESL::Dispatch({}); $| = 1; sub worker { my $self = shift; print "I'm a worker\n"; } sub heartbeat { my $self = shift; my $event = shift; print Dumper $event; } sub channel_hangup { my $self = shift; my $event = shift; print Dumper $event; print "DO SQL GOODIES HERE!\n"; } sub custom { my $self = shift; my $event = shift; print Dumper $event; print "DO SQL GOODIES HERE!\n"; } $0 = "ESL::Dispatch rocks!"; $daemon->set_worker(\&worker, 2000); $daemon->set_callback("heartbeat", \&heartbeat); $daemon->set_callback("channel_hangup", \&channel_hangup); $daemon->set_callback("custom", \&custom); $daemon->set_callback('spandsp::rxfaxpageresult', \&custom); $daemon->run; I need catch the evnet only subclass spandsp:: (https://wiki.freeswitch.org/wiki/Mod_spandsp#Events) into CUSTOM event. Vladislav Grishin