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Features in Release 2.2
60 RN-001029-00, Rev 06, Release 2.2
IP Phone Release Notes 2.2
Multicast Group Paging
An Administrator or User can configure a specific softkey on the phone that
allows you to send/receive a Real Time Transport Protocol (RTP) stream to/from
pre-configured multicast address(es) without involving SIP signaling. This is
called Group Paging on the IP phones. You can specify up to 5 listening multicast
addresses.
An Administrator can use the following parameters in the configuration files to set
Group Paging RTP Settings:
• paging group listening
• softkeyN type, topsoftkeyN type, prgkeyN type, or expmodX keyN type
• sofkeyN label, topsoftkeyN label, or expmodX keyN label
• softkeyN value, topsoftkeyN value, prgkeyN value, or expmodX keyN
value
An Administrator or User can use the following parameters in the Aastra Web UI
to set Group Paging RTP Settings:
• Paging Listen Addresses (Basic Settings->Preferences->Group Paging RTP
Settings)
• <Paging> Softkey (Operation->Softkeys and XML,
Operation->Programmable Keys, Operation->Expansion Keys)
How it works
After pressing a configured “Paging” softkey on the phone, the Phone sends RTP
to a preconfigured multicast address. Any phone in the local network then listens
for RTP on the preconfigured multicast address. For both sending and receiving of
the multicast RTP there is no sip signaling involved. The Phone displays the
“Paging” message to the phone’s LCD.
The phone uses the G711 uLaw CODEC for multicast RTP.
Note: Multicast RTP is one way only - from sender to the receiver (i.e.
from sender to the multicast address (receiver)).