1531-DBC 422 02 Uen B3 2013-12-02
96
I
NSTALLATION
OF
OPTION
UNIT
DBY 420 01
Figure 77:External cable connection
There are three alternatives using this function. The function is selected
by the menu:
Settings - Option Unit
.
Extra bell:
The extra bell (or lamp) is activated in parallel with the ring signal.
It is possible to define via the configuration file if the bell or lamp
shall be activated when a call is received on a MNS key.
Busy signal:
The busy signal is activated in off-hook mode. The function can be
used to control a Do-not-disturb lamp at the door.
Combined Extra bell and Busy signal:
Activated in parallel with the ring signals and steady active in
off-hook mode. This indication can be used for lamp indication in
e.g. office landscapes.
A free on second call does not activate the extra bell function.
When the function is active, the circuit is closed via an opto relay, which
is used to separate the external device electrically from the phone.
Maximum load on the external device is: 1 A resistive or 0.3 A capacitive
or 0.3 A inductive load at maximum 24 V AC or 48 V DC. An external
over-voltage protection is recommended.
9.2
Post installation measures after mounting
the option unit
Connect the power to the phone and when the phone has started, log on
to the gatekeeper. Check that a call can be established and check that
the installed extra equipment works.
