HPBX allows you to set up hunt groups quickly and easily, in this tutorial I will create a hunt group with three levels, each level will have a set time to ring for. Level 1 will be 10 seconds, Level 2 will be 20 seconds and level 3 will be 30 seconds. Each level will also have a set of destination to ring and the default destination if no one answers will be set to a voicemail.
To do this you first need to login to HPBX and go to features and then Hunt Groups.