NEC SL1000 - Page 494

Operation
To mute your telephone handset or Handsfree microphone while on a call:
1. Press Mute key.
To turn your telephone microphone back on:
1. Press Mute key.
Use Mute key only if you pressed it initially to turn off your Handsfree microphone.
SL1000/SL1100 ISSUE 2.0
1-484
Microphone Cutoff
M