[asterisk-users] 's' extension Asterisk 1.2.18

[OCOSA ListAcct]

how can I fix this just started ......

Jul 14 14:32:35 NOTICE[4983]: chan_zap.c:6223 ss_thread: Got event 18 
(Ring Begin)...
  == Starting Zap/1-1 at bell,s,1 failed so falling back to exten 's'
  == Starting Zap/1-1 at bell,s,1 still failed so falling back to 
context 'default'
Jul 14 14:32:35 WARNING[4983]: pbx.c:2377 __ast_pbx_run: Channel 
'Zap/1-1' sent into invalid extension 's' in context 'default', but no 
invalid handler
    -- Hungup 'Zap/1-1'
    -- Starting simple switch on 'Zap/1-1'

Otis