AT&T DECT TL9178 - Manual (Page 39)

Telephone operation
34
Options while on calls
Mute
Use the mute function to turn off the microphone.
You can hear the caller, but the caller does not
hear you.
To mute a call:
• Press
DELETE/
MUTE to turn off the microphone.
When mute is on, the handset screen shows
MUTED for a few seconds and MUTE appears
until you turn off mute.
To un-mute a call:
• Press
DELETE/
MUTE again and resume speaking.
When mute is off, MICROPHONE ON appears
temporarily on the handset screen.
DELETE
/MUTE