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Hardware Overview
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Trunk B
Socket
Trunk A
Socket
Dual Trunk
Matrix Card
Selected
Line Type
Bottom Edge
Connector
J4
J3
J1
J2
DID
Figure 6. Dual Trunk Interface Matrix Cards
For Simplified schematic diagrams of the four telco trunk types serviced by the matrix card, see
“Configuration Diagrams” in Section 11.
External RS-232 Ports
Two 9-pin serial ports on the rear of the trunk card provide interface to an alphanumeric input
device. The Model 640 supports the TAP (Telocator alphanumeric protocol) for alphanumeric
display paging. A paging entry station can be directly connected to the DB-9 ports to enable an
operator to manually enter alphanumeric pages into the paging terminal.
Note:
Each RS-232 port that is active replaces a trunk. As a result, the total number of
inputs always remains 4 (if a second trunk card is installed). For example, if one TAP
port is used, then only 3 trunks remain available for telco paging activity.
Modem Interfaces
A DUART (U15) on each dual trunk board interfaces the standard modems (U21, U22) with the
peripheral board processor. It also provides some general purpose I/O functions for the processor.
The modem interfaces may be disabled in order to enable RS-232 alpha interfaces through stan-
dard rear panel DB-9 connectors.
Audio Level Adjustments
Four audio level adjustment are located on the front of the dual trunk interface for each trunk.
Figure 7 shows the front panel of the Model 640. Each trunk has three pots and one switch that
define the audio levels. In addition, three front-panel LEDs identify operation of each trunk (12
total).
See Section 6 for detailed adjustment procedures.
Summary of Contents for 640 DAPT XTRA
Page 2: ......
Page 6: ...Statements vi 025 9416...
Page 20: ...Introduction 8 025 9416...
Page 26: ...Specifications 14 025 9416...
Page 96: ...Installation 84 025 9416...
Page 126: ...Optional Equipment Installation 114 025 9416...
Page 134: ...Voice Prompts 122 025 9416...
Page 174: ...Parts Lists and Schematics 162 025 9416 Schematic...
Page 175: ...Parts Lists and Schematics 025 9416 163...
Page 176: ...Parts Lists and Schematics 164 025 9416...
Page 177: ...Parts Lists and Schematics 025 9416 165...
Page 178: ...Parts Lists and Schematics 166 025 9416...
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Page 182: ...Parts Lists and Schematics 170 025 9416 Silkscreen...
Page 185: ...Parts Lists and Schematics 025 9416 173 Schematic...
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Page 190: ...Parts Lists and Schematics 178 025 9416 Silkscreen...
Page 193: ...Parts Lists and Schematics 025 9416 181 Schematic...
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Page 196: ...Parts Lists and Schematics 184 025 9416 Silkscreen...
Page 198: ...Parts Lists and Schematics 186 025 9416 RAM Disk 702 9386B ROM Disk 702 9389B...
Page 199: ...Parts Lists and Schematics 025 9416 187 TNPP Interface 702 9362C 2...
Page 200: ...Parts Lists and Schematics 188 025 9416 Terminal Block Adapter 702 9470B...
Page 201: ...Parts Lists and Schematics 025 9416 189 CONFIGURATION DIAGRAMS Dual Trunk Telco DID 024 0076A...
Page 202: ...Parts Lists and Schematics 190 025 9416 Dual Trunk Telco End to End 024 0077A...
Page 203: ...Parts Lists and Schematics 025 9416 191 Dual Trunk Telco E M 024 0078A...
Page 204: ...Parts Lists and Schematics 192 025 9416 Dual Trunk Telco Ground Start 024 0079A...
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