Urmet 1083 Notice page 28

The 2Voice system elements must be interconnected in a genuine transmission network. For this reason, each
network section must be adapted to the wire impedance for correct operation. Consider the following:
• Only use the type of wire shown in the previous chapter (2).
• The minimum twisting radius must not be less than 10 times the external diameter of the wire (approximately
7cm) to prevent altering characteristics.
• Remove the sheath for the length needed to separate the pair in the two-wire line only.
• Do not add electrical nodes to connect the devices. Use the device terminals only. Fit a 4/-user video
distributor Ref. 1083/55 to connect an extension apartment unit to a riser column that does not cross the
apartment.
Exception: electric nodes are allowed if audio door phones only are present in the column.
(2) The use of other wire types must be subjected to prior approval by Urmet according to the type and
distances in the system.
NO
• A jumper to be inserted in the line termination (Z) is present in apartment stations, distributors and column
interfaces. Activate the termination for devices wired at the end of a line from which another section does
not start from the device terminals (end of line):
LINE OUT
LINE 3 LINE 1
Z= OFF
LINE 4 LINE 2
LINE IN
Refer to the corresponding instruction booklets provided with the products for identifying the position of the
line termination jumper in the various devices.
Warning
The line terminal on/off jumper (Z) is not present on some video door phones (e.g. 1750/1, 1750/5, 1750/6).
Consequently, the in-out connection can only be implemented by adding the Ref. 1750/50 accessory, which
must be installed in the device preceding the end-of-line device in the specifi c housing on the back of the
video door phone.
LINE IN
28
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Z= ON
Z= OFF
Z= ON
LINE
IN
LINE
OUT
Z= OFF
LINE
IN
Z= ON
LINE
OUT
Z= OFF
LINE 1
LINE 4
LINE
Z= ON
IN
LINE 3 LINE 1
Z= ON
LINE 4 LINE 2
LINE IN
LINE OUT
LINE 3 LINE 1 LINE IN
Z= OFF
LINE 4 LINE 2
LINE IN
YES
LINE 1 LINE 2
1083/55
LINE 4 LINE 3
Z= ON
LINE 2
1083/50
LINE 3
From main
Z= ON
calling station
LINE OUT LINE IN
+ 1750/50 + 1750/50
Z= OFF Z= OFF
YES
Z= ON
LINE 3
LINE 4
Z= OFF Z= OFF
LINE IN LINE OUT LINE IN LINE OUT
LINE OUT LINE IN
Z= ON
Z= ON
LINE OUT
LINE 1
Z= OFF
LINE 2
LINE IN
Z= ON
LINE IN
DS1083-029E