asterisk users - Sep 2010 - MeetMe errorhandling

Hi Group, 
i have a MeetMe Question.

I use  "MeetMe(,Ms)"  in the Dialplan and if a Conference Room
does't exist Asterisk play  (conf-invalid.slin)
If i use "MeetMe(${room},Ms)"  (value from DTMF Read) and the
Conference Room doesn't exist Asterisk don't play (conf-invalid.slin)
and Asterisk Hangup the Call.

there is a solution for the kind my problem?

Thanx and bye
Daniel

>
> I use  "MeetMe(,Ms)"  in the Dialplan and if a Conference Room
does't exist
> Asterisk play  (conf-invalid.slin)
> If i use "MeetMe(${room},Ms)"  (value from DTMF Read) and the
Conference
> Room doesn't exist Asterisk don't play (conf-invalid.slin) and
Asterisk
> Hangup the Call.
>
Use the "i" extension to control what happens when entering an invalid
room
number. Simple example:

exten => 5000,Goto(confline,s,1)

[confline]
exten => s,1,Background(enter-conf-call-number)
exten => s,n,WaitExten(20)

exten => i,1,Playback(conf-invalid)
exten => i,n,Goto(s,1)

exten => t,1,Goto(s,1)

; Participants always dial a 7-digit conference number, optionally followed
; by the #-sign
exten => _XXXXXXX,1,MeetMe(${EXTEN},Mxwsp)
exten => _XXXXXXX,n,Hangup()
exten => _XXXXXXX#,1,Goto(${EXTEN:-8:7},1)
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