[Asterisk-Users] username as extension

[Nathan Alberti]

Is there a way to have extensions automatically created for  
registered sip users ?

I did some investigation and found some hope in chan_sip with  
relation to the somewhat undocumented usereqphone option but i may be  
totally off track.

All i want to be able to do is send a call to number at ip_address where  
the number is the username configured on the phone that has  
registered with asterisk on ip_address.

 From what I understand this should be pretty standard sip  
functionality no ?

Regards,

Nathan.