210
THE DISTANCE MEASUREMENT TABLE
Distance Definition
Distance
(meters)
Recommended Positioning
Exchange –internal distribution frame
Back of the cabinet
Internal dist. frame – 1
st
external dist. frame
At least 20 meters
1
st
external dist. frame – 2
nd
external dist.
frame
They may be close.
Exchange – Alarm panel
It should be placed close to the cabinet.
Exchange - PC
It may be placed 1 m. away from the
exchange.
Exchange – External Modem
It may be placed close the exchange.
Exchange – Hub or Switch
It may be at most 80 meters.
Exchange - DDF
It should be as close as possible.
DDF- HDSL Modem
It should be as close as possible.
Exchange
–
Battery
Group
It is recommended that they be in
separate rooms.
Exchange – Regulator
They should be in separate rooms.
Exchange – Generator
They should be in separate rooms.
Exchange – Grounding installation
See section I.1.D
Exchange – Electrical distribution frame
A single phase is to be connected to the
exchange.
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