INTRODUCTION
Multicast paging is an approach to let different SIP users listen to a page from a common multicast IP
address. In multicast page call, one-way audio will setup from sender to listeners, but the listeners
cannot talk to each other. The sender and listeners must be located within the same LAN.
GRP26XX phones support multicast page sending and listening on firmware version 1.0.0.31 or higher.
Users could configure line keys or multi-purpose keys to send multicast paging. Also, GRP26XX Carrier-
Grade IP Phones are capable to listen to at most 10 different multicast addresses by following defined
preference.
This document serves as an end user guide on how to configure multicast page on the GRP26XX
Carrier-Grade IP Phones. To learn more about GRP26XX's basic and advanced features, please visit
http://www.grandstream.com/support to download the latest "GRP26XX User Guide" and "GRP26XX
Administration Guide".