Installing an Integrated Channel Service Unit (ICSU)
Module
Installing an Integrated Channel
Service Unit (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.
Checking for required components
The integrated channel service unit (ICSU) package contains:
120A3A CSU module
700A DS1 loopback jack
Cable H700-383
4-pair modular cord
Group 2, 50-ft. (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 suffix. The
enhanced ICSU requires a TN464F or TN767E or later suffix. The
enhanced ICSU can also be used with the TN2464 or TN2313.
555-233-115
NOTE:
Re-manufactured/repaired ICSU units and any manufactured after
May 7, 2002 are marked as "120A3A."
Issue 5 October 2002
7-101
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