T1/PRI Cabling

T1/PRI Cabling

WARNING

Before connecting the cable, read Telephone Lines Unsafe Voltages in the Safety Precautions section at the front of this manual.

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

100 Ohm

two twisted pairs, category 3 or higher

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

The actual cable length between the adapter and the carrier must be measured and recorded; you will need this information

The cable must include an RJ48C plug at the end dedicated to the WAN adapter. It must also provide the appropriate plug or cabling system at the end connected to the carrier or CSU. See Connector Pinouts on page 24 and relevant carrier or CSU documentation for more information.

T1 Link Requirements

The adapter and the CSU must be configured with several common specifications in order to interoperate. The adapter’s

T1 parameters are set to the following:

Line coding: B8ZS

Frame format: ESF (Extended Super Frame)

Line I/O impedance: 100 Ohm ± 5%

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Interphase Corporation