Chapter 3: Connecting to the Line

T1/PRI Cabling Requirements

The cable between the board and the carrier or the CSU must meet the following standard T1 attenuation and transmission requirements:

100 Ohms

Two twisted pairs, category 3 or higher

Maximum length: 655 feet (200 m) without a CSU, or 6200 feet (1800 meters) with a CSU

Measure and record the actual cable length between the board and the carrier or the CSU. You will need this information when you configure the line profile parameters.

The cable must include an RJ48C plug at the end dedicated to the WAN board. It must also provide the appropriate plug or cabling system at the end connected to the carrier or CSU. See Connector Pinouts on page 34 and relevant carrier or CSU documentation for more information.

T1 Link Requirements

If the board connects to the T1/PRI line, the board and CSU must be configured with several common parameters to interoperate. The board’s T1 parameters are set as follows:

Line coding: B8ZS

Frame format: ESF (Extended Super Frame)

Line I/O impedance: 100 Ohm ± 5%

5536 PRI RAS Communications Controller Users Guide

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