NEC ELECTRA ELITE IPK II, Руководство по аппаратному обеспечению системы, Страница: 58 / 642

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3 - 24 System Specifications
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Document Revision 3 Electra Elite IPK II
5.2 Cabling Precautions
5.2.1 Cable Placement
When selecting cables and Main Distribution Frame (MDF), future
expansion or assignment changes should be considered. Avoid
running cables in the following places:
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A place exposed to wind or rain.
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A place near heat radiating equipment or where the quality of
station cable covering could be affected by gases and
chemicals.
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An unstable place subject to vibration.
Table 3-8 Cable Connection Between the Analog Port and
the Single Line Equipment
Connected Equipment Cable
Maximum Distance or
Impedance Between
Equipment and Telephone
AD(A)-R/AD(A)-2R Unit Twisted Pair 10 feet
ADA(2)-W Unit Twisted Pair 10 feet
AP(A)-R or AP(R)-R Unit Twisted Pair 50 feet
APA-U Unit or APR-U Unit Twisted Pair 50 feet
OPX(2)-U( ) ETU Twisted Pair 1,600 ohms
SLI(4)/(8)-U( ) ETU Twisted Pair 300 ohms
SLIB(4)/SLIE(4)-U10 ETU Twisted Pair 300 ohms
SLTII(1)-U10 ADP Twisted Pair 50 feet
Mixing digital and analog ports through the same 25-pair cable runs
is not recommended.
Table 3-9 Cabling Requirements
Connected Equipment Cable
External Amplifier Hi-Fi Shielded Audio Cable
Music on Hold and Background Music
Sources
Hi-Fi Shielded Audio Cable
ITH Cabling
Cat 5 Straight Data Network cable
100 meters maximum distance