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1Install and cable a G600 cabinet
Install off-premises station wiring
S8100 Installation and Upgrades 125
November 2003
An analog out-of-building (500-, 2500-, or 7100-series) telephone connected to an Analog Line circuit
pack should be near enough that its maximum loop resistance does not exceed 1300 Ohms.
The following voice terminals cannot be installed in an exposed environment:
• 7300-series voice terminals connected to TN762 Hybrid Line circuit packs
• Multibutton Electronic Telephone (MET) sets connected to TN735 MET Line circuit packs
• Analog telephones connected to TN746 Analog Line circuit packs
See Table 3, Comcodes for equipment used with G600,
on page 63 for circuit protector ordering
information (comcodes).
Digital out-of-building telephones
Use the following equipment to protect digital out-of-building voice terminals and Digital Line circuit
packs at both building entrances:
• 4C3S-75 Enhanced Protector
• ITW Linx Enhanced Protector
These units provide primary and sneak-current protection. The 4C3S-75 is equipped with a heat coil for
sneak-current protection while the ITW Linx is equipped with replaceable fuses for sneak-current
protection.
Use the 4C3S-75 only with Vintage 14 or newer TN754 circuit packs. The 4C3S-75 can be used on any
vintage of the TN754B circuit pack. The ITW Linx may be used on any vintage of the TN754 circuit
pack. Table 19, Digital voice-circuit protectors,
on page 126 lists the approved protectors.
NOTE:
The TN2181 (2-wire 16-port Digital Line circuit pack) may not be approved for some out-
of-building uses. Contact your Avaya representative for more information.
Table 18: Analog line circuit protectors
Primary
1
1 The 3-type protectors should only be used if they are already part of the existing protection system. A sneak-
current protector is always required when a 3-type primary protector is used.
Primary (with heat coil) Sneak-current protectors
1
3B1A (carbon) 4B1C (carbon) 220029 Fuse
3B1E-W (wide-gap gas tube) 4B1E-W (wide-gap gas tube) SCP-1
3C1S (solid state) 4C1S (solid state)