WARNING[3206]: pbx.c:2357 problem when dialing asterisk

A newly installed asterisk system (asterisk- on CentOS 4.2 with X100P card) doesn’t pick up when dialed. Observing CLI while dialing the line on which asterisk is hooked up reveals following warning:

WARNING[3206]: pbx.c:2357 __ast_pbx_run: Channel ‘Zap/1-1’ sent into invalid extension ‘s’ in context ‘default’ but no invalid handler

How to repair this so the system picks up the call?

Look in the default context in extensions.conf you need something like this

exten => s,1,Answer
exten => s,n, …what ever you want it to do dial someone ,playback a sound file,etc,etc