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Note: When a modular base unit is used with the Headset jack, the handset
should remain plugged into the Handset jack.
The privacy of the Whisper Page announcement cannot be guaranteed
when telephones have modular base units other than the M10L-8400
(Comcode: 407639715; PEC: 3122-022). The M10L-8400 is the only
modular base unit that should be used for the 6400 Series telephones.
Note that this does NOT apply to headsets plugged into the Headset
jack on the back of the 6416D+M and 6424D+M telephones that do not
require a modular base. For more information, see the instructions for
the Whisper Page feature in the Voice Features section.
Note: If you plug the headset directly into the Headset jack, you may use a
button on the adapter cord, if so equipped, to go off-hook and on-hook,
or a button may be administered.
FIGURE 3 The Headset Connected to the Headset Jack on the 6416D+M
and 6424D+M Telephones (No Modular Base Unit Required)
Headpieces
The following headpieces can be used with these telephones:
Headpieces with Modular Bases or with Adapter Cords
Mirage® Receiver fits over either ear. Not for noisy environments.
StarSet® Eartip fits in ear canal.
Supra® Monaural — Adjustable headband and soft ear cushion.
Headset On/Off
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