Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series IP Phones
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Microphone Mute Configuration
The following table lists the parameter you can use to enable or disable mute feature.
It enables or disables the allow mute feature for the IP phone.
Note: For T23P/T23G/T21(P) E2 IP phones, you are allowed to activate the mute
feature on the pre-dialing/dialing/calling/ringing screen only if
“features.keep_mute.enable” is set to 1 (Enabled).
0-Disabled
1-Enabled, you are allowed to mute an active call, or activate the mute feature on the
pre-dialing/dialing/calling/ringing screen. (Mute the microphone on the calling screen
is only applicable to the T54S/T52S/T48S/T48G/T46S/T46G/T29G IP phones).
Features->General Information->Allow Mute
Keep Mute
Keep mute, also known as persistent mute, allows you to keep the mute state persisting across call.
In a call center or meet room, if incoming calls are answered automatically, the callers may hear local
discussion. Therefore, you can mute the phone in an idle state to prevent the unintended situation. The
mute state persists across calls until you unmute the microphone manually or until the phone restarts.
You can activate the keep mute feature by pressing the MUTE key in
idle/pre-dialing/dialing/ringing/calling/talking state.
For T23P/T23G/T21(P) E2 IP phones, the Cancel key ( ) can be used to cancel actions, reject incoming calls,
mute/un-mutes calls or activate the mute feature. If keep mute feature is enabled, the Cancel key can only
be used as a mute key.
Topic
Keep Mute Configuration
Keep Mute Configuration
The following table lists the parameter you can use to enable or disable keep mute.
features.keep_mute.enable
It configures the keep mute feature for the IP phone.
Note: If it is set to 1 (Enabled), you cannot customize the Cancel key for
T23P/T23G/T21(P) E2 IP phones, or the Mute key for