Yealink SIP-T54S Administrator's Manual page 717

Enter the label in the Label field.
3.
The label will appear on the LCD screen when sending the RTP multicast.
Select the desired channel from the pull-down list Channel.
4.
Click Confirm to accept the change.
5.
To configure a multicast paging key via web user interface:
Click on Dsskey->Line Key (or Programable Key).
1.
In the desired DSS key field, select Paging from the pull-down list of Type.
2.
Enter the multicast IP address and port number in the Value field.
3.
The valid multicast IP addresses range from 224.0.0.0 to 239.255.255.255.
(Optional.) Enter the string that will appear on the LCD screen in the Label field.
4.
Enter the desired channel in the Extension field.
5.
The valid channel ranges from 0 to 30.
Click Confirm to accept the change.
6.
To configure a paging list key via web user interface:
Click on Dsskey->Line Key (or Programable Key).
1.
In the desired DSS key field, select Paging List from the pull-down list of Type.
2.
Configuring Advanced Features
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