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DEFINITY Made Easy Tools
Issue 3, December 2001
Install and Wire Telephones
Off-Premises Protection Requirements
Both building entrances require carbon block or equivalent protection and sneak current protection. Protection can be provided by:
- a 4-type protector, which is equipped with a heat coil
- a 3-type protector plus a separate sneak current protector
The 4-type protector is the preferred device. For installations not using primary protection, 4-type protectors should always be used. When the 3-type protector is already installed, a separate sneak current protector is required.
The multi-pair protector units and the off-premises cabling must be locally engineered. Connectorized multi-pair protector units (female 25-pair connector) are recommended. Analog Line Circuit Protectors shows the recommended protectors.
The protectors can be ordered from the Premises Distribution Systems Equipment and Supplies Catalog.