-- Starting simple switch on 'Zap/5-1'
  == Starting Zap/5-1 at line4,s,1 failed so falling back to exten 's'
  == Starting Zap/5-1 at line4,s,1 still failed so falling back to context 'default'
[Dec 18 14:55:18] WARNING[28324]: pbx.c:2478 __ast_pbx_run: Channel 'Zap/5-1' sent into invalid extension 's' in context 'default', but no invalid handler
    -- Hungup 'Zap/5-1'