CHAPTER 4. STATION WIRING
PART OF 66-TYPE
CONNECTING BLOCK
ASSOCIATED WITH
CO TRUNK
CIRCUIT PACK
(TN747)
TC
PART OF 66-TYPE
CONNECTING BLOCK
ASSOCIATED WITH
CENTRAL OFFICE
TK
LC
LEADS
PART OF 66-TYPE
CONNECTING BLOCK
ASSOCIATED WITH
EMERGENCY
TRANSFER TERMINAL
PART OF 66-TYPE
CONNECTING BLOCK
ASSOCIATED WITH
574-5 POWER
TRANSFER UNIT
PART OF 66-TYPE
CONNECTING BLOCK
ASSOCIATED WITH
ANALOG LINE
CIRCUIT PACK
(TN742 OR TN769)
ST
TO BLUE
OR WHITE
FIELD
PART OF 66-TYPE
CONNECTING BLOCK
ASSOCIATED WITH
AUXILIARY
CONNECTOR
GRD
-48V
Figure 4-29. Connections at Trunk/Auxiliary Field Equipped with
66-Type Hardware for Telephone Used for Emergency
Transfer and as Normal Extension
lnstalling Optional DID Make-Busy Trunk for Use with 574-5 Power Transfer
Unit
Requirements
Figure 4-30 shows the connections at the trunk/auxiliary cross-connect
field for a direct inward dialing (DID) make-busy trunk. This option
prevents DID trunks from being taken out of service by the serving CO
during emergency transfer. This trunk is used for this function only and
should be assigned to the twenty-fifth pair of a network interface jack.
4-50
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...