Off-Premises Circuit Protection - Avaya MCC1 Installation And Upgrades

Media gateways installation and avaya definity server si upgrades made easy

Hide thumbs Also See for MCC1:

Table of Contents

Install Telecommunications Cabling

Off-Premises Circuit Protection

Each label identifies 2 rows on the terminal block. The upper half identifies the row above it and the

lower half identifies the row below it. The labels are inserted into the clear plastic designation strips

furnished with the terminal blocks. The strip is snapped in place between the terminal block rows. Label

code number 1220A contains all of the required labels.

Figure 139: Label Graphic Symbols and Nomenclature

Figure notes

Write Floor or Building Identification on

Label as Required

Off-Premises Circuit Protection

Protection from hazardous voltages and currents is required for all off-premises (out of building) trunks,

lines, and terminal installations. Both over-voltage protection (lightning, power induction, and so forth),

and sneak current protection are required. Sneak current protectors must be either UL listed/CSA

certified, or must comply with local safety standards.

Sneak current protectors must have a maximum rating of 350 mA, and a minimum voltage rating of 600

V, or as required by local regulations. The following devices protect the system from over-voltages:

Analog trunks use the 507B sneak protector or equivalent. 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, or equivalent:

— Carbon block with heat coil for UL code 4B1C

— Gas tube with heat coil for UL code 4B1E-W

— Solid state with heat coil for UL code 4C1S

DCP and ISDN-BRI terminals use the solid state 4C3S-75 with heat coil protector, or equivalent

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

r758422i LJK 050996

Information Outlet

Site/Satellite Closet

SI Installation and Upgrades

Table of Contents