meetme ambulance noise

[frikyaster]

Hi All,
I have several meetme rooms configured in my asterisk.
exten=>1620,1,Meetme(1620|MPd|2323)
exten=>1621,1,Meetme(1621|MPd|2324)
exten=>1622,1,Meetme(1622|MPd|2325)
exten=>1625,n,Meetme(1625|MPd|2326)
;exten=>999,1,Answer()
;exten=>999,n,Playback(conference_recording-1578)
;exten=>999,n,Playback(vm-goodbye)
;exten=>999,n,Hangup()

Ramdomly only the first one stop of working, the problem in detail is:
1. the user dial the meetme number,
2. the system asks for access pin, after that what the user can hear is like an ambulance noise.

The traces are just showing that:
Executing [1620@OF.000:1] MeetMe("SIP/21020-463eb968", "1620|MPd|2323") in new stack

p*CLI>
-- <SIP/21020-463eb968> Playing 'conf-getpin' (language 'es')

pawn extension (OF.000, 1620, 1) exited non-zero on 'SIP/21020-463eb968'
Hangup: hanging up channel SIP/21020-463eb968 in state Up


p*CLI>

-- mysqldelete: family=Busy, key=21020

p*CLI>
-- Device state of SIP/21020 is 1

Any idea about what could be happening?
frikyast

 

[busster]

I would try removing and rebuilding the conference. I have seen this resolve issues before.