hello thank u for your reply and i have done the thing which you wanted me to do.but still i am getting the same message "invalid extension"
asterisk CLI
> Channel SIP/cc100-09a11d78 was answered.
-- Executing MeetMe("SIP/cc100-09a11d78", "8600051|F") in new stack
== Parsing '/etc/asterisk/meetme.conf': Found
-- Created MeetMe conference 1023 for conference '8600051'
-- Playing 'conf-onlyperson' (language 'en')
== Manager 'sendcron' logged off from 127.0.0.1
== Parsing '/etc/asterisk/manager.conf': Found
== Manager 'sendcron' logged on from 127.0.0.1
-- Executing MeetMe("Local/8600051@default-2bba,2", "8600051|F") in new stack
> Channel Local/8600051@default-2bba,1 was answered.
== Starting Local/8600051@default-2bba,1 at default,17802810022,1 failed so falling back to exten 's'
== Starting Local/8600051@default-2bba,1 at default,s,1 still failed so falling back to context 'default'
-- Sent into invalid extension 's' in context 'default' on Local/8600051@default-2bba,1
-- Executing Playback("Local/8600051@default-2bba,1", "invalid") in new stack
-- Playing 'invalid' (language 'en')
May 21 16:20:44 WARNING[27840]: file.c:1045 ast_waitstream: Unexpected control subclass '-1'
== Manager 'sendcron' logged off from 127.0.0.1
== Parsing '/etc/asterisk/manager.conf': Found
== Manager 'sendcron' logged on from 127.0.0.1
-- Executing MeetMe("Local/58600051@default-9146,2", "8600051|Fmq") in new stack
> Channel Local/58600051@default-9146,1 was answered.
-- Executing Answer("Local/58600051@default-9146,1", "") in new stack
-- Executing Monitor("Local/58600051@default-9146,1", "wav|20100522-015048_7802810022") in new stack
-- Executing Wait("Local/58600051@default-9146,1", "3600") in new stack
== Manager 'sendcron' logged off from 127.0.0.1
-- Timeout on Local/8600051@default-2bba,1
== CDR updated on Local/8600051@default-2bba,1
-- Executing Goto("Local/8600051@default-2bba,1", "#|1") in new stack
-- Goto (default,#,1)
-- Executing Playback("Local/8600051@default-2bba,1", "invalid") in new stack
-- Playing 'invalid' (language 'en')
== Parsing '/etc/asterisk/manager.conf': Found
== Manager 'sendcron' logged on from 127.0.0.1
== Parsing '/etc/asterisk/manager.conf': Found
== Manager 'sendcron' logged on from 127.0.0.1
== Manager 'sendcron' logged off from 127.0.0.1
-- Executing Hangup("Local/8600051@default-2bba,1", "") in new stack
== Spawn extension (default, #, 2) exited non-zero on 'Local/8600051@default-2bba,1'
-- Executing DeadAGI("Local/8600051@default-2bba,1", "agi://127.0.0.1:4577/call_log--HVcauses--PRI-----NODEBUG-----16---------------") in new stack
-- AGI Script
agi://127.0.0.1:4577/call_log--HVcauses ... ---------- completed, returning 0
== Spawn extension (default, 8600051, 1) exited non-zero on 'Local/8600051@default-2bba,2'
-- Executing DeadAGI("Local/8600051@default-2bba,2", "agi://127.0.0.1:4577/call_log--HVcauses--PRI-----NODEBUG-----0---------------") in new stack
-- AGI Script
agi://127.0.0.1:4577/call_log--HVcauses ... ---------- completed, returning 0
== Parsing '/etc/asterisk/manager.conf': Found
== Manager 'sendcron' logged on from 127.0.0.1
== Manager 'sendcron' logged off from 127.0.0.1
== Manager 'sendcron' logged off from 127.0.0.1
== Parsing '/etc/asterisk/manager.conf': Found
== Manager 'sendcron' logged on from 127.0.0.1
== Parsing '/etc/asterisk/manager.conf': Found
== Manager 'sendcron' logged on from 127.0.0.1
== Manager 'sendcron' logged off from 127.0.0.1
== Parsing '/etc/asterisk/manager.conf': Found
== Manager 'sendcron' logged on from 127.0.0.1
== Manager 'sendcron' logged off from 127.0.0.1
== Manager 'sendcron' logged off from 127.0.0.1