GLOSSARY
Switch
The software-controlled communications processor complex that
interprets dialing pulses/tones/keyboard characters and makes the
proper interconnections both within the system and outside the
system. The switch itself consists of a digital computer, software,
storage device (memory), and associated circuit packs
hardware necessary to perform the actual connections.
Switchhook
and special
The button(s) on a voice terminal located under the receiver. A user
typically goes “off-hook” to place or answer a call by picking up the
receiver and goes “on-hook” (hangs up) to end a call.
The RS-232C DTE peripheral equipment used to enter and change
system translations.
Synchronization
System
System
Coordinated timing whereby all switches,
multiplexer operate from the same stable
process assures that the transmit and the
achieve proper bit alignment.
Administrator
channel banks, and
clock reference. The
distant receive node
A person responsible for specifying and administering features and
services for the system.
R e s t o r e
A process that allows stored data to be written from a tape into the
system memory (normally after a cold start).
T 1
The T1 carrier system is a high speed, time division multiplexed,
digital transmission facility capable of transmitting voice and data at
1.544 Mbps. In System 25, T1 can replace up to 24 analog trunks,
offering improved quality, cost savings, and enhanced features.
G-15
Summary of Contents for Network Adapter 25
Page 1: ...AT T AT T System 25 Installation and Maintenance Manual 555 540 103 B November 1995 ...
Page 18: ...APPENDIX F Administration Error Messages GLOSSARY I N D E X F 1 G 1 I 1 viii ...
Page 31: ...INSTALLATION MOUNTING CENTERS WHEN FLANGES ARE OVERLAPPED Figure 2 2 617A Panel 2 7 ...
Page 33: ...INSTALLATION Z21OA1 ADAPTER Y ADAPTER WP90851 L1 858A ADAPTER Figure 2 3 SIP Adapters 2 9 ...
Page 50: ...INSTALLATION Figure 2 10 Three Cabinet System Front View With Covers Removed 2 26 ...
Page 51: ...INSTALLATION Figure 2 11 Position of Shorting Plugs on CPU Memory Circuit Pack 2 27 ...
Page 72: ...INSTALLATION UPPER ADAPTER MOUNTING CLIP Figure 2 18 Mounting Adapters ...
Page 85: ...INSTALLATION 2 61 ...
Page 92: ...INSTALLATION 2 68 ...
Page 103: ...INSTALLATION Figure 2 32 10B Emergency Transfer Unit 2 78 ...
Page 104: ...INSTALLATION Figure 2 33 Emergency Transfer Unit Connections 2 79 ...
Page 109: ...INSTALLATION Figure 2 35 Attendant Console With DXS Console 2 84 ...
Page 146: ...INSTALLATION 2 119b This page intentionally left blank November 1995 ...
Page 153: ...INSTALLATION This page intentionally left blank 2 124b November 1995 ...
Page 223: ...MAINTENANCE Figure 4 2 Clearing Supply Troubles Sheet 1 of 2 4 47 ...
Page 224: ...MAINTENANCE Figure 4 2 Clearing Power Supply Troubles Sheet 2 of 2 ...
Page 225: ...MAINTENANCE Figure 4 3 Clearing CO Trunk Troubles 4 49 ...
Page 226: ...MAINTENANCE Figure 4 4 Clearing 4 Wire Tie Trunk Troubles Sheet 1 of 4 4 50 ...
Page 227: ...MAINTENANCE Figure 4 4 Clearing 4 Wire Tie Trunk Troubles Sheet 2 of 4 4 51 ...
Page 228: ...MAINTENANCE Figure 4 4 Clearing 4 Wire Tie Trunk Troubles Sheet 3 of 4 4 52 ...
Page 229: ...MAINTENANCE Figure 4 4 Clearing 4 Wire Tie Trunk Troubles Sheet 4 of 4 4 53 ...
Page 231: ...Figure 4 6 Clearing Tie Trunk Troubles Sheet 1 of 5 4 55 ...
Page 232: ...MAINTENANCE 6 7 8 9 10 Figure 4 6 Clearing Tie Trunk Troubles Sheet 2 of 5 4 56 ...
Page 233: ...MAINTENANCE Figure 4 6 Clearing Tie Trunk Troubles Sheet 3 of 5 4 57 ...
Page 234: ...MAINTENANCE Figure 4 6 Clearing Tie Trunk Troubles Sheet 4 of 5 4 58 ...
Page 235: ...MAINTENANCE Figure 4 6 Clearing Tie Trunk Troubles Sheet 5 of 5 4 59 ...
Page 236: ...MAINTENANCE Figure 4 7 Clearing Paging Equipment Troubles ...
Page 250: ...MAINTENANCE Figure 4 9 System Cabinet Backplane Wiring Side Sheet 2 of 2 4 74 ...
Page 251: ...MAINTENANCE Figure 4 10 TDM Signal Designations on Cabinet Backplane 4 75 ...
Page 252: ...MAINTENANCE Figure 4 11 Power Designations on Cabinet Backplane 4 76 ...
Page 263: ...MAINTENANCE Figure 4 12 Clearing Virtual Facilities Troubles Sheet 1 of 3 ...
Page 264: ...MAINTENANCE Figure 4 12 Clearing Virtual Facilities Troubles Sheet 2 of 3 4 87 ...
Page 265: ...MAINTENANCE Figure 4 12 Clearing Virtual Facilities Troubles Sheet 3 of 3 4 88 ...
Page 271: ...MAINTENANCE Figure 4 13 Clearing Switched Loop Attendant Console Troubles Sheet 1 of 5 ...
Page 272: ...MAINTENANCE 4 13 Clearing Switched Loop 2 of 5 Console Troubles Sheet 4 95 ...
Page 273: ...MAINTENANCE Figure 4 13 Clearing Switched 3 of 5 Loop Attendant Console Troubles Sheet 4 96 ...
Page 274: ...MAINTENANCE 4 13 Clearing Switched 4 of 5 Console Troubles 4 97 ...
Page 321: ...APPENDIX E Administration Codes and Data This page is intentionally blank E 2 b ...