Yealink SIP-T2XP Administrator's Manual page 334

Administrator's Guide for SIP-T2xP IP Phones
Multicast paging allows IP phones to send/receive Real-time Transport Protocol (RTP)
streams to/from the pre-configured multicast address(es) without involving SIP signaling.
Up to 10 listening multicast addresses can be specified on the IP phone.
Users can send an RTP stream without involving SIP signaling by pressing a configured
multicast paging key or a paging list key. A multicast address (IP: Port) should be
assigned to the multicast paging key, which is defined to transmit RTP stream to a group
of designated IP phones. When the IP phone sends the RTP stream to a pre-configured
multicast address, each IP phone preconfigured to listen to the multicast address can
receive the RTP stream. When the originator stops sending the RTP stream, the
subscribers stop receiving it.
Procedure
Configuration changes can be performed using the configuration files or locally.
Configuration File
316
<y0000000000xx>.cfg
Specify a multicast codec for the IP
phone to use for multicast RTP .
Parameter:
multicast.codec
Assign a multicast paging key.
Parameters:
memorykey.X.type/ linekey.X.type
memorykey.X.value/
linekey.X.value
Assign a paging list key.
Parameters:
memorykey.X.type/ linekey.X.type
memorykey.X.value/
linekey.X.value
Configure the multicast IP address
and port number for a paging list
key.
Parameter:
multicast.paging_address.X.ip_ad
dress
Configure the multicast paging