Polycom 1725-36028-001 manual Telephone Interface Configuration, Prepare Demarcation Demarc Blocks

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Telephone Interface

Configuration

The customer or the customer's wire contractor is responsible for adhering to all local codes for wiring.

Prepare Demarcation (Demarc) Blocks

The SpectraLink 8000 Telephony Gateway is connected to the existing telephone system using RJ-21 connections. A SpectraLink 8000 Telephony Gateway is designed to operate with a specific interface to the telephone system: two-wire digital, two-wire analog, or four-wire digital. A four-wire system may require two demarc blocks.

Based on the number and type of interfaces in the system, determine the number of 25-pair cables required to connect telephone line ports to the demarcation blocks.

If the wiring between the SpectraLink 8000 Telephony Gateway and the telephone system leaves the building, consult your telephone system manual for instructions on providing adequate lightning and other over-current protection.

All SpectraLink 8000 Telephony Gateways (except the TGA116) are intended only for connection to the isolated side of an on- premises PBX or key system.

The interfaces are intended to connect to digital PBX ports that provide signals of 5Vp-p (max) AC components. Some PBXs provide a 48 V DC offset.

Modem administration

The SpectraLink 8000 Telephony Gateway can also be accessed remotely using its internal modem and a dedicated telephone line. If

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