1If your desk phone has a volume control set it to middle level-volume.
2On the bottom of the switcher, ensure the configuration slide switch is set to "A", the listening
volume dial is set to 3 and the speaking volume is set to "2".
1Remove the handset from the desk phone cradle (or if you connected your MDA400 product to the
headset connection on the bottom of the phone, press the headset button on your phone).
2While wearing your headset, press the desk phone talk button on the MDA400.
3If you do not hear a dial tone adjust the configuration switch to each successive position starting
with A and ending at G, until you do.
4Dial a test call from the desk phone. Make sure that the person on the other end can clearly hear
you. In some cases the other end will experience extreme momentary or permanent echo, in this
case, you have an incorrect setting. Repeat steps 5 and 6 starting with the next candidate switch
position where a dial tone is heard.
5If needed, adjust the listening volume dial if the other person is too loud or distorted. Ask the
person on the other end to speak at different volume levels.
6If needed, adjust the speaking volume dial, while speaking at loud and medium volume levels, ask
the person on the other end if the sound is reasonably free from distortion.
7End call by pressing the headset call button and returning the handset to the desk phone cradle (or
pressing the headset button on your phone if connected to a headset specific jack).
NOTE If you will be installing the HL10 lifter and power supply, continue below. If not continue with
Computer: Connect and Call.
Check Configuration and
Make a Test Call
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