Avaya S8700 Installation Instructions Manual page 218

Installing and wiring telephones and trunks
Table 27: Digital Voice Circuit Protectors
Circuit Pack
TN754B all vintages
TN2181 all vintages
TN2224CP all vintages
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 reterminate the outside plant cable on a 5-pin mounting block
for only a few out-of-building terminals.
Installing the ITW Linx Enhanced Protector
The ITW Linx Enhanced Protector can be installed in series with existing primary protection. The ITW
Linx Enhanced Protector mounts directly on connecting blocks and requires a separate ground bar.
Installing the 4C3S-75 Enhanced Protector
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.
Installing the data link protector
The maximum range for out-of-building digital telephones is 3400 feet when using 24 AWG (#5)
(0.5 square millimeters) wire and 2,200 feet (670 meters) when using 26 AWG (#4) (0.4 square
millimeters) wire. The range can be extended to 5,000 feet (1,524 meters) using 24 AWG (#5) wire or
4,000 feet (1,220 meters) using 26 AWG (#4) wire with the use of a data link protector. The protector is
an isolating transformer used to remove phantom power on the media gateway side and re-introduce it on
the terminal side.
When a protector is used, the telephone must be locally powered by an external power supply or through
the AC power cord provided with some telephones. The protector is installed on the equipment side of the
protection in both buildings.
See Figure 83, Example adjunct power connections,
trunk/auxiliary field,
218
Enhanced Primary Protector
(With Sneak Current Protection)
4C3S-75 or ITW Linx
4C3S-75 or ITW Linx
4C3S-75 or ITW Linx
on page 219.
Installing the Avaya S8700 Media Server with an Avaya G650 Media Gateway
on page 207 and Figure 86, Connections at
December 2003