Operation Manual

Your telephone call features

To switch from handset to handsfree:

1. Press the Handsfree Key.

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 Telephone. Refer

to Hardware Options for recommended

headset types for you telephone.

Note 2: Access Volume Adjustment in the

Options List to adjust the headset volume

and gain that work 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 steadily to indicate you are

in headset mode. The headset LED is dark

(unlit) if you are in handset mode.

Goodbye

Headset