New Expansion Handsets
Note: This section is for new handsets only. The
handset that came with your system is preregistered
to your base unit, and is ready to use from the box.
Your MD790 series phone system is expandable up
to eight handsets. Use the steps below to register
any new MD790 series phone expansion handsets to
your base unit.
Registering a New Expansion Handset
Press and hold the
expansion handset beeps.
to return to the handset screen.
Deregistering an Expansion Handset
Caution: If you deregister all handsets from the base unit
you will render your cordless telephone system inoperable
until at least one handset is reregistered to the base unit.
When deregistering a handset, delete or listen to all
voice mail messages, if necessary, to clear the IN USE/
Voice Mail indicator.
Press and hold down
USE indicator begins to flash slowly, then release.
Press and hold down PAGE again until the IN USE
indicator begins to flash quickly, then release PAGE.
button on the base until the
on the base unit and all handsets.
on the base unit until the IN