May 2001
System Hardware Manual
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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
