Installing Sneak Current And Off Premise Protection - Avaya S8700 Installation Instructions Manual

Installing sneak current and off premise
protection
Protection from hazardous voltages and currents is required for all off-premises (out of building) trunks,
lines, and terminal installations. Protection for incoming analog trunks is required between the incoming
RJ21X or RJ2GX network interface and the media gateway for both trunk and off-premise circuit packs.
Both over-voltage protection (lightning, power induction, and so forth), and sneak current protection are
required.
The following devices protect the media gateway from over-voltages:
•
Analog trunks use the 507B sneak protector or equivalent. Over-voltage protection is normally
provided by the local telephone company.
•
DS1/E1/T1 circuits require isolation from exposed facilities. This isolation may be provided by a
CSU (T1), LIU (E1), or other equipment that provides equivalent protection
•
Analog telephones use 146 Series Line Protectors combined over-voltage and sneak current
protection, or equivalent: See PEC 8310-0xx; SAP Code 10512x.
•
DCP and ISDN-BRI terminals use a low voltage version of the 146 Series Line Protectors.
The Model 507B sneak current fuse panel, or equivalent, is recommended for sneak current protection for
analog trunks. The panel contains two 25-pair connectors, one fuse removal tool, and 50, 220029 sneak
fuses (and two spares). Each column of sneak fuse panels requires approximately 8 inches (20
centimeters) of horizontal wall space.
See Figure 66, Model 507B sneak fuse panel,
information, on page 169 for ordering information.
168
NOTE:
Sneak current protectors with a rating of 350 mA at 600 volts must be Underwriter's
Laboratory, Inc. (UL) listed for United States installation and Canadian Standards
Association (CSA) certified for Canadian installation.
Installing the Avaya S8700 Media Server with an Avaya G650 Media Gateway
on page 169. See Table 12, Sneak fuse panel ordering
December 2003