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DEFINITY Enterprise Communications Server Release 6
Installation and Test for Multi-Carrier Cabinets
555-230-112
Issue 5
May 1998
Install and Wire Telephones and Other Equipment
Page 5-35Off-Premises or Out-of-Building Stations
5
When possible, all new and reused wiring installations should use blocks that
accept the standard 5-pin plug-in 4C3S-75 protector. However, there are reused
wiring installations where this may not be cost effective. For these installations,
the ITW Linx protector may be installed. An example of this is where screw-type
carbon block protectors (or other non plug-compatible types) are in place and it
is too costly to re-terminate the outside plant cable on a 5-pin mounting block for
only a few out-of-building terminals.
The ITW Linx Enhanced Protector may be installed in series with existing primary
protection. The 4C3S-75 protector cannot be installed in series with other types
of primary protection. It must be installed as the only protection on the line
entering the building. For the 4C3S-75 protector there are a variety of 25-, 50-,
and 100-pair protector panels equipped with 110-type connecting blocks and/or
RJ21X connectors. The ITW Linx Enhanced Protector mounts directly on
connecting blocks and requires a separate ground bar.
The maximum range for out-of-building digital voice terminals is 3400 feet (1036
m) when using 24 AWG (#5) (0.26 mm
2
) wire and 2200 feet (670 m) when using
26 AWG (#4) (0.14 mm
2
) wire. The range can be extended to 5000 feet (1524 m)
using 24 AWG (#5) (0.26 mm
2
) wire or 4000 feet (1219 m) using 26 AWG (#4)
(0.14 mm
2
) wire with the use of a Data Link Protector (DLP). The DLP is an
isolating transformer used to remove phantom power on the system side and
re-introduce it on the terminal side. When a protector is used, the voice terminal
must be locally powered by an external power supply or through the AC power
cord provided with some of the 7400-type voice terminals. The protector is
installed on the equipment side of the protection in both buildings.
Protector and Data Link Protector Ordering Information
Description Comcode
4C3S-75 (Solid State with Heat Coil) 105581086
ITW LINX (Gas Tube, Avalanche Suppress) 406144907
ITW Linx Ground Bar (used with above) 901007120
ITW Linx Replacement Fuse 406304816
Data Link Protector (1 circuit) 103972758
Data Link Protector (8 circuits) 103972733