A group of users can be created with a purpose of receiving voice announcements through the speaker of a telephone set, but it has to be in the waiting mode.
The Digium D70 is a phone capable of providing HD quality of voice and PoE, it comes with six line keys and ten digital, rapid dial buttons providing status information in real time and additionally a field indicators of a busy lamp for one hundred of your most valuable contacts. The D70 is created for executives and administrators, it was built specially for Switchvox phone system ans Asterisk.