CHAPTER 5. AUXILIARY EQUIPMENT INSTALLATION
Installing Loudspeaker Paging Access—278A Paging
Adapter
Requirements
Access to loudspeaker paging is provided by an information outlet. The
switch side of the cross-connect field is connected to a 278A adapter.
The 27A adapter is designed to operate on -24V dc. If it is to be
operated on -48V dc, it must be modified with a D-181321 kit of parts.
The adapter is mounted in the auxiliary cabinet, if one is available. If an
auxiliary cabinet is not available, a connectorized wiring block must be
locally engineered to replace the auxiliary cabinet ED-1E443-10
intra-connection panel. Six leads (T, R, SZ, SZ1, S, and S1) connect the
adapter to a TN763 auxiliary trunk circuit pack located in a port carrier.
A TN763 circuit pack contains four ports.
Figure 5-2 shows the connections for the Loudspeaker Paging feature.
The connections are for one zone. Repeat the connections for each
paging zone.
The connections shown in Figure 5-2 are used when the loudspeaker
interface equipment is not located in the equipment room. If the
loudspeaker amplifier is located in the equipment room, the connections
do not have to be routed through the cross-connect field.
5-5
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...