AT&T DEFINITY 7500 series Manuals

Manuals and User Guides for AT&T DEFINITY 7500 series. We have 2 AT&T DEFINITY 7500 series manuals available for free PDF download: Network Manual, User Manual

AT&T DEFINITY 7500 series Network Manual (348 pages)

Network and Data Connectivity

Brand: AT&T | Category: Conference System | Size: 1.81 MB

Table of Contents
4
About this Document
17
Figure 1-1. Analog-To-Digital Conversion
24
Figure 1-2. Transmission States for Voice Communication
28
Table 1-1. Terminal/Port Compatibility
29
Table 1-2. Trunk Port Types
30
Figure 1-3. Transmission States for Data Transmission
32
Table 1-3. Protocol States for Data Communication
34
Table 1-4. Physical-Layer Protocol Vs. Character Code
35
Table 1-5. DMI Mode Vs. Character Code
35
Figure 1-4. Time Slot
37
Line Coding
39
Trunking
55
Types of Networks
74
Network Evolution
75
Software Capabilities
76
- Basic Networking Software
  76
- Distributed Communications System
  79
Network Call Processing
79
Network Administration
89
Private Network Trunks
89
Networking Feature Parameters
89
Table 2-2. Network Administration Terminals and Systems
90
Table 2-3. Networking Feature Parameters
91
Interactions with Other Networks
93
Figure 4-1. Standalone MS/T Network
95
Ms/T Configurations
96
Ms/T Features
98
Interactions
103
Etn Configurations
105
Etn Trunks
106
Features
109
- Uniform Numbering Plan
  109
- Figure 5-3. Private Network Uniform Numbering Plan
  110
Etn Interactions with Other Networks
111
Engineering Considerations
118
Figure 6-1. Distributed Communications System (DCS) Cluster
119
Dcs Clusters
120
Dcs Links
120
Dcs Signaling Link Connections
126
Transparent Features
132
Engineering Considerations
139
Table 6-5. DCS Cluster Limits
139
Administration Considerations
141
Data Communications Variables
144
- Communications Protocols
  144
- Figure 7-1. Possible Data Connections
  145
- Analog Vs. Digital
  146
- Synchronous Vs. Asynchronous
  146
- Simplex Vs. Half-Duplex Vs. Full-Duplex
  147
- Figure 7-2. Synchronous Vs. Asynchronous Communication
  147
- Parallel Vs. Serial
  148
- Transmission Speed
  148
- Figure 7-3. Modes of Link Operation
  148
- Type of Communications Channel
  149
- Figure 7-4. Serial Vs. Parallel
  149
Special Data Features
151
- Terminal Dialing
  151
- Data Call Setup from a Voice Terminal
  152
- Computer Dialing
  152
- Data Hot Line
  152
- Table 7-1. Data Feature Vs Communications Systems
  152
- Data Protection
  153
- Data Privacy
  153
- Data Restriction
  153
- Data Only Off-Premises Extension
  153
- Figure 7-5. Off-Premises Data-Only Extension — Conﬁgurations
  154
Dte Connections
157
- Dte Compatibility
  157
  - Protocol Converters
    157
  - Terminal Emulators
    158
  - PC/PBX or PC/ISDN
    158
  - Figure 8-1. PC/PBX and PC/ISDN 3270 Emulation Connections
    158
- Dce Possibilities
  159
  - Data Modules
    159
  - Adus
    160
  - Modems
    160
- Data Module Characteristics
  160
- Table 8-1. DCP-Port Data Modules
  162
- Table 8-2. BRI-Port Data Modules
  163
- Modem Pooling Connections
  164
- Figure 8-3. External Modem Pool Using Intelligent Modems (Hayes-Compatible)
  165
- Figure 8-4. Integrated Modem Pool
  165
- Figure 8-5. Modem Pooling over a DS1 Channel
  166
Local Area Network Connections
167
Public and Private Data Network Connections
175
- Public Data Networks
  175
  - Packet-Switched Public Data Networks
    175
  - Circuit-Switched Public Data Networks
    176
    
    Figure 8-14. Public Switched Data Network with Robbed Bit Facilities (Mode 1)
    177
    
    Table 8-6. Requirements for Connections from the PBX to SDS/SDDN
    178
    
    Figure 8-15. Domestic Public Switched Data Network with ISDN-PRI Facilities (Modes 0, 1, 2 3)
    179
    
    Figure 8-16. International Public Switched Data Network with ISDN-PRI Facilities (Modes 0 1)
    179
- Private Data Networks
  180
Telemarketing Host Connections
185
Data Network Administration
189
Dsc and Psc Connections
192
Figure 9-1. Dedicated/Permanent Switched Connections — Conﬁgurations (Sheet 1-Or 2)
193
Figure 9-2. SNA-Node to SNA-Node Connection
195
Sna Node Connections
195
Connections through Public or Private Data Networks
196
- File Transfers
  196
- Video Teleconferencing
  196
- Figure 9-3. a Possible File-Transfer Conﬁguration
  196
- Image Processing
  197
- FAX Transmittal
  197
- Figure 9-4. a Possible Teleconferencing Conﬁguration
  197
- Figure 9-5. a Possible Imaging Conﬁguration
  198
- Figure 9-6. a Possible FAX Conﬁguration
  198
The Need for Synchronization
209
Figure B-1. Options for Synchronization
210
Synchronization Hierarchy
211
Figure B-2. Synchronization Hierarchy
212
Figure B-3. Stratum Levels for the Synchronization Hierarchy
215
Figure B-4. SCS (Generic 2)
216
Figure B-5. Duplicated Synchronization Architecture and Cross Coupling
217
Changes to the Scs Software Made Available Via Software Patches
219
Figure B-6. Tone-Clock Synchronizer (Nonduplicated, Generic 1)
220
Figure B-7. Public-Network External Clock
223
Figure B-8. External Clock
224
Figure B-9. External-Clock Interface
225
Figure B-10. External-Clock Duplicated Synchronization
225
Network Synchronization and Engineering
226
Figure B-11. External and Internal Reference Levels
227
Figure B-12. Nonpublic Network Without Digital Switches
228
Figure B-13. Proper Use of Backup Facilities
229
Figure B-14. Improper Use of Backup Facilities
230
Figure B-15. Optimal Diverse Routing
231
Figure B-16. Less than Optimal Diverse Routing
232
Figure B-17. Excessive Cascading
233
Figure B-18. Minimized Cascading
233
Figure B-19. Excessive Synchronization from One Node
234
Figure B-20. Minimized Synchronization from One Node
235
Availability of Synchronization Sources
236
Conclusions on Synchronization
237
Figure D-1. OSI Reference Model
276
Figure D-2. ISDN Protocols
281
Figure D-3. Data Mode 1 with DCP and DS1/DMI/BOS Frame Multiplexing Arrangements
285
Figure D-4. Data Mode 2 Frame Structure
287
Figure D-5. DCP Frame Format
289

AT&T DEFINITY 7500 series User Manual (170 pages)

Data Module Integrated Services Digital Network (ISDN)

Brand: AT&T | Category: Control Unit | Size: 1.95 MB

Important Safety Instructions
3
Table of Contents
5
1 : Introduction

12
2 : Product Overview

16
3 : Front Panel Feature Access

20
4: Definitions of 7500 Options 5

62
- Answer 5
  62
- Attention 5
  62
- Autoadjust 5
  63
- Autodial 5
  64
- Break 5
  64
- Busyout 5
  65
- Char.erase (Character Erase) 5
  66
- Data.rest (Data Restriction) 5
  66
- DCD (Data Carrier Detect)
  67
- DTR (Data Terminal Ready) 5
  68
- Duplex 5
  69
- Edit 5
  70
- FCPN (Flow Control Parameter Negotiation) 5
  70
- Forwarding 6
  71
- Idle.timer 6
  72
- Line.erase 6
  72
- Local Mode 6
  73
- Match.speed 6
  73
- Min.timer (Minimum Delay Timer) 6
  74
- Mode 6
  74
  - Asynchronous DCE 6
    75
  - Synchronous DCE 6
    76
- Parity 6
  77
- Rec.flow (Receive Flow Control) 6
  77
- Setup 6
  78
- Speed 6
  79
- Text 6
  80
- Trans.flow (Transmit Flow Control) 6
  80
- ZCA (Zero Called Address) 7
  81
5 : Asynchronous Dce Configuration 7

82
6 : Asynchronous Dte Configuration

106
7 : Synchronous Dce Configuration

112
- Connection Types
  112
- Making a Data Call
  112
8 : Installing the 7500

114
- Stand-Alone Installations
  114
Appendix

162
- Table Y: Hexadecimal Values for ASCII Characters
  162
- Cause Messages
  163
- Table AA
  164
- Cause Messages
  164
- Index
  166

AT&T Categories

Cordless Telephone

Telephone Conference System Handsets Answering Machine

More AT&T Manuals

AT&T DEFINITY 7500 series Manuals

AT&T DEFINITY 7500 series Network Manual (348 pages)

Table of Contents

AT&T DEFINITY 7500 series User Manual (170 pages)

Table of Contents

1 : Introduction

4 On "System Administrator": an Important Note to All Users

2 : Product Overview

3 : Front Panel Feature Access

4: Definitions of 7500 Options 5

5 : Asynchronous Dce Configuration 7

6 : Asynchronous Dte Configuration

7 : Synchronous Dce Configuration

8 : Installing the 7500

Appendix

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