About Installing an ICSU Module

Made Easy Tool for DEFINITY Media Server Configurations
Issue 5, October 2002

Add Channel Service Units

About Installing an ICSU Module

The integrated channel service unit (ICSU) is a combination of a 120A3A CSU module integrated with a DS1 circuit pack. A 700A DS1 loopback jack must be installed with this device.

See Installing the 120A3A CSU for step-by-step installation procedures for the 120A3A CSU.

Check for required components

The ICSU package contains:

120A3A CSU module

700A DS1 loopback jack

Cable H600-383

4-pair modular cord
Group 2, 50-foot (15.2 m) cable (standard)

Cord DW8A-DE

4-pair modular cord to alarm contacts

DS1 circuit pack

The basic ICSU requires a TN464E or TN767D or later. The enhanced integrated channel service unit can also be used with the TN2464 or TN2313.

H700-383-Equivalent Cable Guidelines

If using cabling other than the H700-383 provided with the 120A3A, observe the following guidelines:

Use 24-gauge wire that provides individually shielded, twisted pairs for transmit and receive signals. Use the cable between the network interface and the 120A3A. Ground the shields of this cable only at the 120A3A end to avoid ground loops.

Cabling between the network interface and 120A3A can have no bridge taps.

If using standard house riser cable for connections between the network interface and the 120A3A, maintain a 100-pair separation between the receive and transmit twisted pairs.

If using standard house riser cable for connections between the network interface and the 120A3A, allow no more than 2 cross connects to 110-type cross connect blocks.

Never use quad cable (untwisted two pair telephone cable) in a DS1 line.

Avoid mixing wires of different gauges in a DS1 line.

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