Figure 2-21. DS1 Connections—1311 to 4310 Feet
DS1 Connections—4311 Feet or More
For distances of more than 4311 feet, T1 line repeaters are required in
addition to the CSUs. See the “Install CSU” section of this manual for
installing the CSU. Figure 2-22 shows a functional diagram of this
connection. If the connection is being made between the S25 and a DEFINITY
G1 or G2, System 75, or System 85, refer to the System 85 Installation
Manual (555-1 03-1 04) or the DEFINITY G1 Wiring Guide (555-204-111) or the
System 75 Wiring Guide (555-200-111) for the connecting information.
CSU
(NOTE)
PROTECTION
CIRCUIT
655 FEET
MAXIMUMDS1 LINE
WITH
REPEATERS
DSX-1*
CSU
DS1(NOTE)PROTECTION
CIRCUIT
655 FEET
MAXIMUM
NOTE : USE OF THE OFFICE REPEATER IS OPTIONAL DEPENDING
UPON THE DISTANCE TO THE FIRST T 1 REPEATER
*DSX-1 REFERS TO A PHYSICAL CROSS-CONNECT FOR DS1
SIGNALS
Figure 2-22. DS1 connections—4311 Feet or More
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