Alarm Functions
1) Press the Mute button during the alert signal, then press Yes to confirm the message Delay
MD/NM detection?.
The corresponding display icon keeps flashing until the alarm is active again (by default 10
minutes).
Reset the Alarm Function after Man-down and No-Movement Alarm Has Been Sent
To reset the alarm function, perform one of the following:
• Press any button on the handset.
• Move the handset to an upright position (after man-down).
• Move the handset (after No-movement).
• Press the Mute button if the ALS alerts.
Acoustic Location Signal
An alarm can be followed by an Acoustic Location Signal (ALS). The ALS is a signal from the
handset that alerts for a predefined period of time. The signal can be silenced by pressing the
Mute button on the handset.
A31003-M2000-U110-01-7619, 29/04/2020
OpenScape WLAN Phone WL4/WL4 Plus, Quick Reference Guide 15