AASTRA REV 06 사용자 설명서

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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)).