[Asterisk-Users] Voicemail configuration

[Joao Pereira]

Hello,
I have my SIP clients registered with names, and I want to implement the 
voicemail in my Asterisk.
I have these lines to redirect the call to the voicemail:

exten => pereira,1,Answer
exten => pereira,2,Wait(1)
exten => pereira,3,VoiceMail(u${EXTEN})
exten => pereira,4,Playback(vm-goodbye)
exten => pereira,5,Hangup

But how do I force this rule to be applied to all calls? instead of 
writing these 5 lines for each of my clients ?

If I used numbers, I could do _XXXX ... but how do I write the rule for 
client names?
Thanks
Joao Pereira