:: Error ::
 == Starting Zap/3-1 at outgoing,s,1 failed so falling back to exten 's'
  == Starting Zap/3-1 at outgoing,s,1 still failed so falling back to context 'default'
Jul 15 17:28:47 WARNING[18306]: pbx.c:2279 __ast_pbx_run: Channel 'Zap/3-1' sent into invalid extension 's' in context 'default', but no invalid handler
    -- Hungup 'Zap/3-1'

:: Zapta.conf ::
signalling=fxo_ks
group=1
callerid="Flamegreen <(0845) 119 60 90>
context=outgoing
channel => 3

:: Extensions.conf ::

[outgoing]
exten => _9X.,1,Dial(Zap/g1/${EXTEN:1}|20,t)