Yealink SIP-T22P User Manual page 109

User Guide SIP-T22P IP Phone
2. Select the desired codec from the pull-down list of Multicast Codec.
3. Click Confirm to accept the change.
Note
If G722 codec is used for multicast paging, the LCD screen prompts "HD" to indicate that
the phone is providing high definition voice.
To send RTP stream:
1. Press the multicast paging key when the phone is idle.
The phone sends RTP to a preconfigured multicast address (IP: Port). Any phone in
the local network then listens to the RTP on the preconfigured multicast address (IP:
Port). For both sending and receiving of the multicast RTP there is no sip signaling
involved.
The multicast paging key LED illuminates solid green.
The following figure shows a multicast RTP session on the phone:
2. Press the Hold soft key to place the current multicast RTP session on hold.
3. Press the Cancel soft key to cancel the multicast RTP session.
Note
Multicast RTP is one way only from sender to the multicast address (es) (receiver). For
outgoing RTP multicasts, all other existing calls on the phone will be placed on hold.
You can configure the phone to receive a Real Time Transport Protocol (RTP) stream from
the pre-configured multicast address (es) without involving SIP signaling. You can
specify up to 10 multicast addresses that the phone listens to on the network.
You can also change the behavior of how the phone handles incoming multicast paging
calls by configuring specific parameters via web user interface. The specific parameters
are: Paging Barge and Paging Priority Active.
Paging Barge
You can use the paging barge feature to define the priority of the voice call in progress.
If the priority of an incoming multicast paging call is lower than that of the active call,
then it will be ignored automatically. If Disabled is selected from the pull-down list of
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