Avaya 6211 Guia Do Utilizador

This chapter describes the protection scheme for DEFINITY® Communications System Generic 2

(hereafter abbreviated to DEFINITY Generic 2 or Generic 2) with universal modules. Basic protection
concepts apply to both the DEFINITY Generic 2 with universal modules, System 85, and
DEFINITY Generic 2 with traditional modules.

There are some differences in the devices used to protect the Generic 2 with universal modules, as well

as differences in the types of circuit packs and terminals these devices protect. See chapter 3, Electrical
Protection: System 85 and DEFINITY Generic 2 with Traditional Modules, for basic information on
protectors and protection schemes for System 85 and DEFINITY Generic 2 with traditional modules.
For Generic 2 with universal modules, there are six primary, three enhanced primary, and one secondary
protector that can serve the needs of in-range, out-of-building (IROB) terminal installations.  The
primary protectors all provide protection in the standard analog voltage range of 220V to 300V and may

include a heat coil for sneak-current protection.  The 4C3S-75 enhanced primary protector is installed in
place of the primary protector and operates at 75V.  The secondary protector is used in conjunction with

primary protection and is installed on the equipment (terminal or port) side of the primary protector.

Following are recommended electrical protectors that can be used for primary, enhanced primary, and
secondary applications.  With the exception of the 79A sneak-current fuses, all of the following primary
and enhanced primary protector units plug into 188 panels.

There are several primary protection devices available for circuit packs, terminals, and trunk lines of

Generic 2 with universal modules.

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3BlA — carbon block device

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3BlE-W — wide-gap gas tube

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3C1S  — solid-state device

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4B1C — carbonblock device that includes a heat coil, providing primary and sneak-current

protection

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4B1E-W — wide-gap gas tube that includes a heat coil, providing primary and sneak-current

protection

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4C1S — solid-state device that includes a heat coil, providing primary and sneak current protection