Avaya DEFINITY ONE - Off-Premises Circuit Protection

Installation and Upgrades for DEFINITY ONE and
IP600 Internet Protocol Release 10
555-233-109
Issue 6
December 2001
Install and Cable the Cabinet
1-90Install equipment room hardware for DEFINITY ONE
1
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 600V, 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/T1 circuits require isolation from exposed facilities. This isolation may
be provided by a channel service unit (CSU) (T1), or other equipment that
provides equivalent protection.