Avaya CMC1 Installation Manual page 120

Installing and Cabling the Cabinets
Install Off-Premises Station Wiring
Table 24: Digital Voice Circuit Protectors
Circuit Pack
TN754 V13 or earlier
TN754 V14 or later
TN754C all vintages
TN2181
TN2224CP
When possible, all new and reused wiring installations should use blocks that accept the standard 5-pin
plug-in 4C3S-75 protector. However, this may not be cost-effective in some cases. 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. Note 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, various 25-, 50-, and
100-pair protector panels are 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
can extend to 5000 feet (1524 m) using 24 AWG (#5) (0.26 mm
AWG (#4) (0.14 mm
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.
Refer to Table 4, Comcodes for CMC1,
120
Enhanced Primary Protector
(With Sneak Current
Protection)
ITW Linx Only
4C3S-75 or ITW Linx
4C3S-75 or ITW Linx
4C3S-75 or ITW Linx
4C3S-75 or ITW Linx
2
) wire and 2200 feet (670 m) when using 26 AWG (#4) (0.14 mm
2
) wire with the use of a data link protector. The protector is an isolating transformer
on page 26 for circuit protector and data link protector comcodes.
Installation, Upgrades and Additions for Avaya CMC1 Media Gateways
2
) wire. The range
2
) wire or 4000 feet (1219 m) using 26
June 2004