This document provides an introduction to the Synchronous Optical NETwork (SONET) standard. Standards in the telecommunications field are always evolving. ...
Synchronous optical network (SONET) is a standard for optical telecommunications transport formulated by the Exchange Carriers Standards Association (ECSA) ...
Utilizing our VoiceArrest™ Interface series of paging and background music accessories, the VoiceArrest™ System can be configured for your installation to provide any or all of the following features:System-wide background music,Zoned background music,All-Call Telephone Paging and Zoned Telephone Paging.