Underwriters Laboratories (Ul); Primary And Secondary Protectors; System Line Circuit Requirements - Toshiba Strata AirLink Installation Manual

Appendix – Specifications

Underwriters Laboratories (UL)

Underwriters Laboratories (UL)
To ensure that installations are fully protected from fire hazards, UL1459 specifies primary and
secondary protectors for circuits that interconnect to the telephone network or cables that exit/enter
buildings.

Primary and Secondary Protectors

Protectors replace bridge clips when installed across two horizontal 66-block terminals. When
using 66-50 connector blocks, it is recommended that protector ITW Linx SCP-9 be used as the
secondary protector and out-of-building primary protector. It provides overvoltage protection of
600VAC or DC, overcurrent protection of 350 mA, and installs in series with the telephone loop.
Line circuits do not require protectors unless the circuit is cross-connected to out-of-building
circuits. In this case, it is recommended that ONEAC 6-AP200 protectors are used. This is a single,
block-mounted protector that provides both primary and secondary protection for out-of-building,
single-line circuits.

System Line Circuit Requirements

Line circuits do not require protectors unless the circuit is cross-connected to out-of-building
circuits. Out-of-building circuits require primary/secondary protectors, and it is recommended that
the ONEAC 6-AP200 be used. This is a single, block-mounted protector that provides both
primary and secondary protection for out-of-building, single-line circuits that are terminated to a
system.
Telephone
Figure 31 Primary and Secondary Protectors
102
Double Punch Down
on System Side
To OPS Analog
Line Unit
25-pair Cable
System
To ONS Analog
Line Unit
25-pair Cable
P2
BSIA
P1
MDF/IDF
Bridge Clips (Not Protected)
P2
Pair 1
Pair 16
WFC/P1
Pair 1
Pair 16
Primary Protection (ONEAC 6-AP-200)
Pair 20
Pair 21
Pair 24
Pair 25
=
ONS
ON-Premise Equipment
3004
=
OPS
OFF-Premise Equipment
Strata AirLink Installation Guide
OPS
OPS
OPS
OPS
Base Station 1
ONS
Base Station 2
ONS
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