10.4.13 How call muting controls affect speaker users
Call muting controls determine whether users can talk and listen on speaker calls. Call muting features
are used to prevent feedback between speakers (local muting) or restrict audio to handset users only
(global muting). Separate muting controls are provided for handset callers and speaker users, but only
speaker users experience muted voice or audio.
Muting controls are defined for lines or users through the UMS (user settings may be based on group
templates). Settings are configured in the UMS and are not configurable by end users.
The behavior of the call muting controls varies depending on how a user joins a call; settings are
determined based on whether a handset or device speaker starts the call first:
•
A user who joins a call by dialing or using a line button is a handset caller. Handset callers can
always speak and listen. Settings for handset users take priority over settings for device speaker users.
•
A user who joins a call by accessing a speaker channel is a speaker user. If the speaker user is not
affected by more restrictive options, the user can listen on the call and speak by using the Push-to-
Talk button.
Note
Rules applied to the microphone depend on whether it is used for handset callers or speaker users.
The following Line and User muting options are available for both handsets and device speakers:
•
No: Does not silence any device speakers. All handsets and speakers function normally. This is the
least restrictive Line or User option. If the line is set for No, the device speakers using the line are
never silenced. If the line is set for User, and a user with no muting accesses the line, the muting
option is overridden when users with more restrictive muting options participate in the call.
•
Local: Silences the user’s own device speaker but not other device speakers. A user with this setting
can talk by using the Push-to-Talk button (if not silenced by another caller), or by using a handset.
All other handsets and speakers function normally. This prevents feedback from audio coming out of
the user’s speaker while the user is talking. The Local setting is available for a user only, and not for a
line.
•
Global: Restricts audio to the handsets; audio is not broadcast over device speakers. This option
might also be used to improve audio quality when local muting is not sufficient. This is the most
restrictive option, and takes precedence over other muting options when a line is set for User and
users with different options access the line. The Global muting options for handsets and speakers
work differently:
•
For handset callers: Silences all device speakers; no audio is transmitted. When a user with this
setting accesses a line on their handset, the user can talk to the call initiator, but all other speaker
users cannot hear the conversation or talk on the channel.
Any other handset callers on the line can participate in the call. After all globally muted handset
callers disconnect from a call, all device speakers resume functioning according to the mute
settings of the remaining participants.
•
For device speaker users: When a user with this setting accesses a line by activating a speaker
channel, the user can talk to the call initiator. The other speaker users cannot hear the conversation
or talk on the call until they press Push-to-Talk or latch the speaker channel; at which time the
speaker users can hear and are heard by the far end.
146 10.4: Use the Speakers application
August 26, 2019 IPC Proprietary
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