Avaya 03-300686 manual Installing sneak current and off premise protection

MDF connections to stations and the public switched telephone network

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.

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.

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, and E&M tie trunks, 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 26: Model 507B sneak fuse panel on page 55. See Table 5: Sneak fuse panel ordering information on page 55 for ordering information.

54 Installing and Connecting the MDF and Telephones