SendImage( ) Sends an image file
SendImage(filename)
Sends an image on a channel, if image transport is supported. If the channel does not support image transport, and there exists a priority n+101 (where n is the current priority), execution will continue at that step. Otherwise, execution will continue at the next priority level.
Returns 0 if the image was sent correctly or if the channel does not support image transport; otherwise, returns -1.
exten => 123,1,SendImage(logo.jpg)