Yealink SIP-T54S Administrator's Manual page 721

Parameters
multicast address on the channel 26 to 30 respectively from Yealink IP phones.
Example:
multicast.listen_address.1.channel = 2
Web User Interface:
Directory->Multicast IP->Multicast Listening->Channel
Phone User Interface:
None
multicast.listen_address.X.volume
(X ranges from 1 to 31)
Description:
Configures the volume of the speaker when receiving the multicast paging calls.
If it is set to 0, the current volume of the speaker takes effect. The volume of the speaker
can be adjusted by pressing the Volume key in advance when the phone is during a call.
You can also adjust the volume of the speaker during the paging call.
If it is set to 1 to 15, the configured volume takes effect and the current volume of the
speaker will be ignored. You are not allowed to adjust the volume of the speaker during
the paging call.
Example:
multicast.listen_address.1.volume = 1
Web User Interface:
None
Phone User Interface:
None
multicast.receive.use_speaker
Description:
Enables or disables the IP phone to always use the speaker as the audio device when
receiving the multicast paging calls.
0-Disabled
1-Enabled
If it is set to 0 (Disabled), the engaged audio device will be used when receiving the
multicast paging calls.
Web User Interface:
None
Phone User Interface:
Configuring Advanced Features
Permitted Values
Integer from 0 to 15
0 or 1
Default
0
0
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