Hello All,
I am working on the VoIP...in which m using the SIP server...and i want to use the voice mail services.....on serching i found that for voice mail i hav to install another server ( voicemail server).....now m totally lost that how my SIP server will communicate with voicemail server and how the call will be directed to the voice mail server after some time by sip server....

Please guide me..........

and one more question which server will be suitable for me.....SIP server or Asterick server.........or any other server for all VoIP services.....