-- Starting simple switch on 'Zap/5-1'
Sep  2 17:26:50 NOTICE[16177]: chan_zap.c:6057 ss_thread: Got event 18 (Ring Begin)...
Sep  2 17:26:52 NOTICE[16177]: chan_zap.c:6057 ss_thread: Got event 2 (Ring/Answered)...
  == Starting Zap/5-1 at ,s,1 failed so falling back to exten 's'
  == Starting Zap/5-1 at ,s,1 still failed so falling back to context 'default'
Sep  2 17:26:52 WARNING[16177]: pbx.c:2357 __ast_pbx_run: Channel 'Zap/5-1' sent into invalid extension 's' in context 'default', but no invalid handler
    -- Hungup 'Zap/5-1'
    -- Starting simple switch on 'Zap/5-1'
Sep  2 17:27:02 NOTICE[16181]: chan_zap.c:6057 ss_thread: Got event 18 (Ring Begin)...
Sep  2 17:27:04 NOTICE[16181]: chan_zap.c:6057 ss_thread: Got event 2 (Ring/Answered)...
  == Starting Zap/5-1 at ,s,1 failed so falling back to exten 's'
  == Starting Zap/5-1 at ,s,1 still failed so falling back to context 'default'
Sep  2 17:27:04 WARNING[16181]: pbx.c:2357 __ast_pbx_run: Channel 'Zap/5-1' sent into invalid extension 's' in context 'default', but no invalid handler
    -- Hungup 'Zap/5-1'
    -- Starting simple switch on 'Zap/5-1'