Figure 2-21. figure 2-22, Ds1 connections—1311 to 4310 feet, Ds1 mnnections4311 feet or more – AT&T System 25 User Manual

Page 79

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

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.

C S U

( N O T E )

P R O T E C T I O N

C I R C U I T

6 5 5 F E E T
M A X I M U M

D S 1 L I N E

W I T H

REPEATERS

D S X - 1 *

C S U

D S 1

( N O T E )

PROTECTION

C I R C U I T

6 5 5 F E E T
M A X I M U M

NOTE : USE OF THE OFFICE REPEATER IS OPTIONAL DEPENDING

UPON THE DISTANCE TO THE FIRST T 1 REPEATER

* D S X - 1 R E F E R S T O A P H Y S I C A L C R O S S - C O N N E C T F O R D S 1

S I G N A L S

Figure 2-22.

DS1 connections—4311 Feet or More

2-55