[Asterisk-Users] no sound playing vm greetings and options

[Hagen TeleConsult]

Hi all,
2 days ago, managed to install rhat and asterisk, starting with 2 sip 
phones, simple config.
CLI reports :
"playing 'vm-theperson'  (language 'no')"    when transferred to voicemail 
after timeout, or
"playing 'vm-password' (language 'no')" when dialing into voicemail 
extension.
But, no sound, nothing heard in phones.
First time, first problem, what am I missing, please help
rgds
Frank 
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