AASTRA 6700i series, 9143, 9480i, 9480i CT SIP Administrator Guide EN - Manual (Page 387)

5-110 41-001343-01 Rev 03, Release 3.2.2
Group Paging RTP Settings
An Administrator or User can configure a specific key (softkey, programmable key, or
expansion module key) 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
• 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 (Path: Basic Settings->Preferences->Group Paging RTP
Settings
)
• Key (Operation->Softkeys and XML, Programmable Keys, or Expansion Module
Keys
)
How it works
After pressing a configured “Paging” key on the phone, the Phone sends RTP to a preconfigured
multicast address(es) (IP port). Any phone in the local network then listens for RTP on the
preconfigured multicast address(es) (IP port). For both sending and receiving of the multicast
RTP there is no sip signaling involved. The Phone displays the multicast RTP sent/received
address(es) to the user.
The phone uses a preconfigured G711 uLaw CODEC for multicast RTP.
For Paging Systems, the phone only plays RTP traffic; users have the ability to drop a rogue
page. The recipient can drop the incoming page if required. The recipient can also set Do Not
Disturb (DND) to ignore any incoming pages.
Note: The Group Paging RTP Settings are dependant upon the setting for
the “Allow Barge In” parameter.
Note: Multicast RTP is one way only - from sender to the receiver (i.e.
from sender to the multicast address(es) (receiver)).
Note: For outgoing RTP multicasts, all other existing calls on the phone
are put on hold.