CHAPTER 5. AUXILIARY EQUIPMENT INSTALLATION
Installing Processor lnterface/EIA Port
The processor interface circuit pack (TN765) provides a single EIA port
that allows access to one data link. Figures 5-31 and 5-32 show direct
connections and modem connections, respectively.
MAXIMUM*
PI/EIA
CABLING DISTANCE
PI/EIA
50'
TN765
TN765
CIRCUIT
CIRCUIT
PACK
PACK
SYSTEM 75
SYSTEM 75
OR 75 XE
OR 75 XE
* THE MAXIMUM DISTANCE LIMITATION FOR TWO
SYSTEM 75/75 XE IS 50 FEET WHEN DIRECTLY
CONNECTED WITH 24 AWG WIRE. REDUCING THE
MAXIMUM DISTANCE MAY BE NECESSARY IF
HIGHER GAUGE WIRE IS USED OR IF THE
CAPACITIVE LOAD ON THE LINE IS INCREASED.
IN GENERAL, THE SYSTEM 75/75 XE SHOULD
BE DIRECTLY CONNECTED BY THE SHORTEST
POSSIBLE CABLE.
Figure 5-31. Direct Connections for Processor Interface/EIA Ports
Between Two System 75s or 75 XEs
5-55
Summary of Contents for System 75
Page 1: ...AT T AT T System 75 and System 75 XE Wiring...
Page 2: ...AT T AT T System 75 and System 75 XE Wiring 555 200 111 Issue 2 August 1989...
Page 16: ...System Wiring Figure 1 2 System Uniform Wiring Plan 1 7...
Page 17: ...CHAPTER 1 INTRODUCTION Figure 1 3 Sample Uniform Wiring Installation 1 8...
Page 29: ...CHAPTER 2 HARDWARE 66 110 Type Figure 2 1 Block Diagram of System 75 or 75 XE Installation 2 2...
Page 35: ...CHAPTER 2 HARDWARE 66 110 Type Figure 2 4 110A Type 100 Pair Terminal Block 2 8...
Page 36: ...110 Type Hardware Description Figure 2 5 110A Type 300 Pair Terminal Block 2 9...
Page 98: ...Typical System Equipment Room Floor Plans 3 15...
Page 143: ...CHAPTER 3 EQUIPMENT ROOM DESIGN 3 60...
Page 144: ...Equipment Room Hardware And Cabling Installation 3 61...
Page 162: ...Equipment Room Hardware And Cabling Installation 3 79...
Page 163: ...Equipment Room Hardware And Cabling Installation 3 80...
Page 197: ...Tables Table 4 A Recommended Protectors 4 42 v...
Page 212: ...Adjunct Powering 4 15...
Page 214: ...Adjunct Powering 4 17...
Page 216: ...Patch Cord Jumper Installation And Administration 4 19...
Page 241: ...CHAPTER 4 STATION WIRING 4 44...
Page 244: ...Miscellaneous Wiring Installation 4 47...
Page 246: ...Miscellaneous Wiring Installation 4 49...
Page 252: ...Miscellaneous Wiring Installation 4 55...
Page 254: ...Miscellaneous Wiring Installation 4 57...
Page 314: ...CHAPTER 5 AUXILIARY EQUIPMENT INSTALLATION 5 41...
Page 324: ...CHAPTER 5 AUXILIARY EQUIPMENT INSTALLATION 5 51...