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User Guide for the SIP-T20P/SIP-T20 IP Phone

Intercom Tone

You can enable or disable the phone to play a warning tone when receiving an

intercom call. If Intercom Tone is enabled, the phone plays a warning tone before

answering the intercom call. If Intercom Tone is disabled, the phone automatically

answers the intercom call without warning. Intercom Tone is enabled by default.

Intercom Barge

You can enable or disable the phone to automatically answer an incoming intercom call

while there is already an active call on the phone. If Intercom Barge is enabled, the

phone automatically answers the intercom call and places the active call on hold. If

Intercom Barge is disabled, the phone handles an incoming intercom call like a waiting

call. Intercom Barge is disabled by default.

You can use multicast paging to quickly and easily forward time sensitive

announcements out to people within the multicast group. You can configure a multicast

paging key on the phone, which allows you to send a Real Time Transport Protocol (RTP)

stream to the pre-configured multicast address(es) without involving SIP signaling. You

can configure the phone to receive an RTP stream from pre-configured multicast

listening address(es) without involving SIP signaling. You can specify up to 10 multicast

listening addresses.

To configure a multicast paging key via phone user interface:

1. Press .

2. Select Fe atures->DSS Keys.

3. Select the desired DSS key.

4. Press or to select Key Event from the Type field.

5. Press or to select Multi-Paging from the Ke y Type field.

6. Enter the multicast IP address and port number (e.g., 224.5.6.20:10008) in the Value

field.

The valid multicast IP addresses range from 224.0.0.0 to 239.255.255.255.

7. Press to accept the change.

2. Key Type:

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Yealink SIP-T20 User Manual Page 98