[asterisk-users] voicemail usernames can't begin with "j" letter?

[Time Bandit]

> Thanks to all that replayed, I made like Mr Watkins told me, and my problem is
> apparently solved, although, because of the usage of the syntax
> VoiceMail(${EXTEN}|u), now, two more sound files are played: vm-theperson and
> vm-isunavail, while before were only played vm-intro and beep.
> Is there a way to disable this two other files that get played every time?
see http://www.voip-info.org/wiki/index.php?page=Asterisk+cmd+VoiceMail