Avaya Media Gateway G700 用户手册

Over-voltage and sneak fuse protection measures are necessary for the safe operation of the 
G700 Media Gateway system. Out-of-building installations of telephones or other standard (tip/
ring) devices/terminals that connect to the Avaya G700 Media Gateway Media Modules require 
over-voltage and sneak current protection at both building entry points. Sneak current 
protectors must have a maximum of 350 mA and a minimum voltage rating of 600V. 

The following devices have been evaluated or tested and approved to protect the Media 
Modules from over-voltages and sneak current protection:

●

Avaya MM712 DCP: either 146E IROB (In-Range Out-of-Building) or 4C3S-75 solid state 
protectors for surge and sneak current.

●

Avaya MM710 T1/E1: over-voltage and sneak protection for the Avaya MM710 T1/E1 
Media Module is provided on the Media Module itself.

●

Avaya MM711 Analog: analog trunks use the 507B or 110-SCP-9 sneak current protectors. 
Over-voltage protection is normally provided by the local telephone company. Analog 
voice terminals use one of the following types of combined over-voltage and sneak current 
protection:

- Gas tube with heat coil: 4B1E-W

- Solid state with heat coil: 4C1S

- IROB: 146C (4-lines) or 146F (25-lines)

!

WARNING:

Only service-trained personnel must install these circuit protection devices.