MT SB2 03
25
MT SB2 03
ENGLISH
Calculating the number of devices for Simplebus1 or door
entry phone systems.
Starting from the assumption that the MAX number of telephones
2408W/A inserted in the same external supplying unit is 100, the
following table is used to calculated the number of elements which
can be installed.
The TOTAL must be less than or equal to 100 for every
external supplying unit.
Note that only the devices inserted on the riser and not those
connected to the intercom network are counted in the table.
Table for calculating the equivalent telephones for Simplebus1
or door entry phone systems.
When the TOTAL equivalent telephones is more than 100, use
additional power supply Art. 1236.
E.G.: door entry phone system with part of extensions
intercommunicating, 2 external units, 3 bell repeaters.
Article N° devices Multiplier Equivalent
inserted on N°
the riser telephones
2408W/A X 1 =
2410W/2A X 2 =
2418W X 2 =
on the riser
2418W on the X 0 =
intercom network
2428W/A X 1 =
1256 X 4 =
1224 X 5 =
4897 X 4 + 6 =
4833/A X 4 =
4714W/2 - 5714 X 1 =
4714W/2I - 5714/I X 0 =
1998 X 10 =
TOTAL =
Article N° devices Multiplier Equivalent
inserted N°
telephones
2408W/A 20 X 1 =20
2410W/2A X 2 =0
2418W 10 X 2 =20
on the riser
2418W on the 20 X 0 =0
intercom network
2428W/A X 1 =0
1256 3 X 4 =12
1224 1 X 5 =5
4897 6 X 4 + 6
6 x 4 + 6=30
4833/A X 4 =0
4714W/2 - 5714 X 1 =0
4714W/2I - 5714/I X 0 =0
1998 X 10 =0
TOTAL = 87 OK!
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