User Guide for the SIP-T42S IP Phone
156
Using Multicast Paging
To send RTP stream via a multicast paging key when the receiver’s phone is idle:
1. Press the multicast paging key when the phone is idle.
The phone sends RTP to a preconfigured multicast address (IP: Port).
Both the sender’s and receiver’s phones play a warning tone and the receiver automatically
answers the multicast RTP session in the hands-free (speakerphone) mode.
The multicast paging key LED illuminates solid green.
The following figure shows a multicast RTP session on the phone:
2. You can do the following:
To place the current multicast RTP session on hold, press the Hold soft key.
The sender’s phone places the multicast RTP session on hold and receiver’s phone
releases the session.
To resume the held multicast RTP session, press the Resume soft key.
The multicast RTP session is established again.
To end the multicast RTP session, press the End Call soft key.
Note
To send RTP stream via a paging key list when the receiver’s phone is idle:
1. Press the paging list key when the phone is idle.
2. Press or to select the desired paging group.
3. Press or the Paging soft key to send RTP.
4. Your can do the following:
To place the current multicast RTP session on hold, press the Hold soft key.
The sender’s phone places the multicast RTP session on hold and receiver’s phone
releases the session.
To resume the held multicast RTP session, press the Resume soft key.
Multicast RTP is one way only from the sender to the multicast address(es) (receiver). For
outgoing RTP multicasts, all other existing calls on the phone will be placed on hold.
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