User guide

Your telephone call features

To switch from handset to handsfree:

1. Press the Handsfree Button.

2. Replace the handset.

3. Press the Goodbye Key to end the call.

To use headset: Connect headset to the headset jack or the

handset jack depending on the headset

type and the telephone you are using.

Press the Headset Key (M3903 and

M3904). For the M3902 read the

instructions that came with your

recommended headset.

Note 1: There are amplified and

unamplified headsets that are compatible

with your M3900 Series Telephones. Refer

to Hardware Options for recommended

headset types for you telephone.

Note 2: Use the Option Headset volume

adjustment to adjust the gain that works

best with the headset type you are using.

To switch from handsfree to headset: Connect headset or put headset on.

Press the Headset Key (M3903 and

M3904). For the M3902 read the

instructions for the headset you are using.

Note: A Headset Key is used to switch

between the headset and the handset

mode of operation (M3903 and M3904).

The LED lights steady to indicate you are in

headset mode. The headset LED is dark

(unlit) if you are in handset mode.

Goodbye

Headset