May 2001
System Hardware Manual 2 - 23
A6-324000-642-01 – Release 4.0
May 2001
4.2 Cabling Precautions
4.2.1 Cable Placement
When selecting cables and Main Distribution Frame
(MDF), future expansion or assignment changes should
be given due consideration. Avoid running cables in the
following places:
✆ A place exposed to wind or rain.
✆ A place near heat radiating equipment or where the
quality of station cable covering could be affected by
gases and chemicals.
✆ An unstable place subject to vibration.
✆ Environmental Conditions Temperatures:
Operating: 0°C ~ 40°C
Recommended Long Term: 10°C ~ 32.2°C
Humidity Operating: 10% ~ 90%
noncondensing
Table 2-4 Cable Connection between an Analogue Interface and a Single Line
Telephone
Interface
Equipment
Cable
Maximum Loop
Resistance
(ohms)
Typical Distance
using Twisted 1-
Pair 24AWG
APR-UA ADP Twisted Pair 600 200m
SLT(1)-U13 ADP Twisted Pair 600 200m
SLI( )-U13 ETU Twisted Pair 950 300m
OPX(2)-U13 ETU Twisted Pair 1800 6km
Note 1: Mixing digital and analogue ports though the same 25-pair cable
runs is not recommended.
Note 2: The Maximum Loop Resistance includes the internal resistance
of the SLT device.
Table 2-5 Cabling Requirements
Connected Equipment Cable
Music on Hold and Background Music
Sources
Hi-Fi Shielded Audio Cable
External Amplifier Hi-Fi Shielded Audio Cable
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