User Guide

User Guide for the SIP-T21(P) E2 IP Phone
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The default channel is 0.
8. Click Confirm to accept the change.
Note
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.
The priorities of listening addresses are predefined: 1 with the highest priority, 31 with the lowest.
Multicast listening addresses are configurable via web user interface only.