AASTRA 7433ip for MX-ONE User Guide EN - Manual (Page 24)

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A ASTRA 7433 IP D ESCRIPTION
based on the handset mode, but it is possible also to make and answer
calls in handsfree mode, that is, without lifting the handset.
2.9 Handsfree Mode
It is not possible to make and answer calls without lifting the handset, but
it is possible to monitor calls, see below.
2.9.1 Monitoring
With the Aastra 7433ip phone, it is possible to make and answer calls,
and to monitor the progress of a call without lifting the handset, but you
have to lift the handset for the other person to hear you.
2.10 Option Unit
It is possible to install an option unit in the phone. The option unit, which
is built into the foot console, provides the phone with a gigabit Ethernet
interface and an extra bell and busy signal.
Gigabit Ethernet
The option unit offers a gigabit Ethernet interface module, the
purpose of which is to pass on gigabit traffic to the PC connected
to the IP terminal. The phone itself does not require the gigabit
speed.
Extra bell and busy signal
The option unit offers an interface for auxiliary equipment, such as
an external bell or a busy signal indicator. There are three alterna-
tives using this function:
Answer a call Press the line button that indicates an
incoming call (the button's indicator is
flashing). You must lift the handset for the
calling person to be able to hear you.
Make a call Dial the number you want to call. When
someone answers, you need to pick up
the handset for the called person to be
able to hear you.
Clear a call Replace the handset.