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Intercom call
An intercom call is signalled on the telephone
with a faster ringing tone than a conventional
incoming outside call. The telephone is auto-
matically connected to the intercom line, to
answer it is enough to pick up the handset.
If within 25 seconds you don't answer, the
telephone is connected again to the trunk line.
Door-opener
When the telephone is connected to the exter-
nal door intercom station, the user can open the
door by pressing:
(ST740)
- the
button
(Standard) - the "R" key twice (R+R) in a 3-
seconds lapse of time.
Intercom call during a telephone conver-
sation
During a telephone conversation, an acoustic
signal (beep) indicates the intercom call.
The user can:
- answer the intercom call and put the tele-
phone conversation on hold (music on hold)
by pressing:
(ST740)
- the
button
(Standard) - the "R" key twice (R+R) in a 3-
seconds lapse of time.
To retrieve the telephone conversation the user
must replace the handset and wait for the tele-
phone ringing back;
- answer to the intercom call and clear the
telephone call by replacing the handset and
waiting for the incoming intercom call to ring;
- ignore the intercom call and continue the
telephone call. The intercom call remains
active for 25 seconds, while the beep signal
remains active only for 10 seconds.
Phone call during an intercom conversa-
tion
During an intercom conversation, any phone
call is signalled by a bip on the background. In
order to answer the phone call, the user has to
replace the handset and wait for the incoming
outside call.
Emergency
In case of power failure, the telephone is con-
nected directly to the trunk line.
Signalling table
Intercom call / call back ringing tone
Warning tone
TELEPHONE PROTECTIONS
PR1. Protection for 1 telephone line.
PR2. Protection for 2 telephone lines.
PRAL. Protection for electrical line (230Vac).
WARNINGS
Do not install the protections in humid places or
near heat sources.
Do not introduce objects or pour liquids inside
the protections.
Do not install the protections during a storm.
Do not touch non-insulated cables, unless they
are not disconnected from the mains.
The protections do not contain user-serviceable
parts: do not open the protection housings. If
necessary, contact an authorized service cen-
tre.
MECHANICAL ASSEMBLING
For the mechanical assembling use the fastening
means supplied with the kit.
The protection devices can be assembled on G-
type (EN 50035) and OMEGA-type (EN 50022)
DIN bars.
Assembling on OMEGA bar
1 Ground spring
2 Fixing screw
3 Notched washer Ø5
4 Plastic fastener
5 Omega bar
Note: Only use the plastic fastener in case of
assembling on OMEGA bar without ground con-
nection.
Assembling on G bar
1 Fixing screw
2 Split washer Ø4
3 Flat washer Ø4
4 Notched washer Ø4
5 Omega bar
6 Mechanical fastener and ground terminal
163
(MT12 - Gb2004)
ELECTRICAL ASSEMBLING
The protection device must be connected to the
ground system using the terminals provided and/
or the grounded DIN bar. The lower the resistance
of the ground system, the higher the efficacy of the
protection device. Disconnect the power supply
before making the connections and refer to the
wiring diagrams.
INSTALLATION DIAGRAMS
PR1
PR2
Trunk
line
Apparatus
Apparatus
PRAL
SERIES connection for monophase power
supply
Apparatus
PARALLEL connection for monophase power
supply
Connect the protection device in parallel to pre-
vent it from being crossed by the operating cur-
rent. This allows for connecting devices that ab-
sorb a higher current than the current stated by the
protection device.
Apparatus
Trunk
lines
F
A
R
T
E
L
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