AT&T 2500 series - Manual

AT&T 2500 series

AT&T 2500 series – Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.

1 Page 1
2 Page 2
3 Page 3
4 Page 4
5 Page 5
6 Page 6
7 Page 7
8 Page 8
9 Page 9
10 Page 10
11 Page 11
12 Page 12
13 Page 13
14 Page 14
15 Page 15
16 Page 16
17 Page 17
18 Page 18
19 Page 19
20 Page 20
21 Page 21
22 Page 22
23 Page 23
24 Page 24
25 Page 25
26 Page 26
27 Page 27
28 Page 28
29 Page 29
30 Page 30
31 Page 31
32 Page 32
33 Page 33
34 Page 34
35 Page 35
36 Page 36
37 Page 37
38 Page 38
39 Page 39
40 Page 40
41 Page 41
42 Page 42
43 Page 43
44 Page 44
45 Page 45
46 Page 46
47 Page 47
48 Page 48
49 Page 49
50 Page 50
51 Page 51
52 Page 52
53 Page 53
54 Page 54
55 Page 55
56 Page 56
57 Page 57
58 Page 58
59 Page 59
60 Page 60
61 Page 61
62 Page 62
63 Page 63
64 Page 64
65 Page 65
66 Page 66
67 Page 67
68 Page 68
69 Page 69
70 Page 70
71 Page 71
72 Page 72
73 Page 73
74 Page 74
75 Page 75
76 Page 76
77 Page 77
78 Page 78
79 Page 79
80 Page 80
81 Page 81
82 Page 82
83 Page 83
84 Page 84
85 Page 85
86 Page 86
87 Page 87
88 Page 88
89 Page 89
90 Page 90
91 Page 91
92 Page 92
93 Page 93
94 Page 94
95 Page 95
96 Page 96
97 Page 97
98 Page 98
99 Page 99
100 Page 100
101 Page 101
102 Page 102
103 Page 103
104 Page 104
105 Page 105
106 Page 106
107 Page 107
108 Page 108
109 Page 109
110 Page 110
111 Page 111
112 Page 112
113 Page 113
114 Page 114
115 Page 115
116 Page 116
117 Page 117
118 Page 118
119 Page 119
120 Page 120
121 Page 121
122 Page 122
123 Page 123
124 Page 124
125 Page 125
126 Page 126
127 Page 127
128 Page 128
129 Page 129
130 Page 130
131 Page 131
132 Page 132
133 Page 133
134 Page 134
135 Page 135
136 Page 136
137 Page 137
138 Page 138
139 Page 139
140 Page 140
141 Page 141
142 Page 142
143 Page 143
144 Page 144
145 Page 145
146 Page 146
147 Page 147
148 Page 148
149 Page 149
150 Page 150
151 Page 151
152 Page 152
153 Page 153
154 Page 154
155 Page 155
156 Page 156
157 Page 157
158 Page 158
159 Page 159
160 Page 160
161 Page 161
162 Page 162
163 Page 163
164 Page 164
165 Page 165
166 Page 166
167 Page 167
168 Page 168
169 Page 169
170 Page 170
171 Page 171
172 Page 172
173 Page 173
174 Page 174
175 Page 175
176 Page 176
177 Page 177
178 Page 178
179 Page 179
180 Page 180
181 Page 181
182 Page 182
183 Page 183
184 Page 184
185 Page 185
186 Page 186
187 Page 187
188 Page 188
189 Page 189
190 Page 190
191 Page 191
192 Page 192
193 Page 193
194 Page 194
195 Page 195
196 Page 196
197 Page 197
198 Page 198
199 Page 199
200 Page 200
201 Page 201
202 Page 202
203 Page 203
204 Page 204
205 Page 205
206 Page 206
207 Page 207
208 Page 208
209 Page 209
210 Page 210
211 Page 211
212 Page 212
213 Page 213
214 Page 214
215 Page 215
216 Page 216
217 Page 217
218 Page 218
219 Page 219
220 Page 220
221 Page 221
222 Page 222
223 Page 223
224 Page 224
225 Page 225
226 Page 226
227 Page 227
228 Page 228
229 Page 229
230 Page 230
231 Page 231
232 Page 232
233 Page 233
234 Page 234
235 Page 235
236 Page 236
237 Page 237
238 Page 238
239 Page 239
240 Page 240
241 Page 241
242 Page 242
243 Page 243
244 Page 244
245 Page 245
246 Page 246
247 Page 247
248 Page 248
249 Page 249
250 Page 250
251 Page 251
252 Page 252
253 Page 253
254 Page 254
255 Page 255
256 Page 256
257 Page 257
258 Page 258
259 Page 259
260 Page 260
261 Page 261
262 Page 262
263 Page 263
264 Page 264
265 Page 265
266 Page 266
267 Page 267
268 Page 268
269 Page 269
270 Page 270
271 Page 271
272 Page 272
273 Page 273
274 Page 274
275 Page 275
276 Page 276
277 Page 277
278 Page 278
279 Page 279
280 Page 280
281 Page 281
282 Page 282
283 Page 283
284 Page 284
285 Page 285
286 Page 286
287 Page 287
288 Page 288
289 Page 289
290 Page 290
291 Page 291
292 Page 292
293 Page 293
294 Page 294
295 Page 295
296 Page 296
297 Page 297
298 Page 298
299 Page 299
300 Page 300
301 Page 301
302 Page 302
303 Page 303
304 Page 304
305 Page 305
306 Page 306
307 Page 307
308 Page 308
309 Page 309
310 Page 310
311 Page 311
312 Page 312
313 Page 313
314 Page 314
315 Page 315
316 Page 316
317 Page 317
318 Page 318
319 Page 319
320 Page 320
321 Page 321
322 Page 322
323 Page 323
324 Page 324
325 Page 325
326 Page 326
327 Page 327
328 Page 328
329 Page 329
330 Page 330
331 Page 331
332 Page 332
333 Page 333
334 Page 334
335 Page 335
336 Page 336
337 Page 337
338 Page 338
339 Page 339
340 Page 340
341 Page 341
342 Page 342
343 Page 343
344 Page 344
345 Page 345
346 Page 346
347 Page 347
348 Page 348
Page: / 348

Table of Contents:

  • Page 3 – CONTENTS
  • Page 15 – xv
  • Page 16 – xvi
  • Page 17 – ABOUT THIS DOCUMENT; Designing telecommunications networks; PREREQUISITE SKILLS AND KNOWLEDGE; An Introduction to AT&T; DOCUMENT ORGANIZATION; xvii
  • Page 18 – xviii; PART I; Generic 1 and Generic 2 communications systems.
  • Page 19 – xix; HOW TO MAKE COMMENTS ABOUT THIS DOCUMENT
  • Page 20 – xx
  • Page 21 – INTRODUCTION TO CONNECTIVITY; Transmission types
  • Page 25 – the same amplitude as the analog signal at the sampled point.; communications system contains a codec, called a digitizer,
  • Page 27 – communications systems —; , the analog port samples the analog
  • Page 28 – Figure 1-2. Transmission States for Voice Communication
  • Page 29 – Circuit Packs; Traditional Universal; Exiting the Switch
  • Page 30 – Analog CO
  • Page 31 – DATA TRANSMISSION
  • Page 32 – Figure 1-3. Transmission States for Data Transmission
  • Page 33 – Protocols Used; Layer 1 Protocols; Generic 1 and 2 systems use this protocol for; Analog — A modulated carrier signal.
  • Page 34 – Layer 2 Protocols; At layer 2, the protocols are given below.; Protocol States; Table 1-3. Protocol States for Data Communication
  • Page 35 – Protocol Code; Connectivity Rules
  • Page 37 – Time-Division Multiplexing
  • Page 38 – Statistical Multiplexing; Communications
  • Page 39 – Line Coding; Alternating Mark Inversion; volts. That is, every other 1 is represented
  • Page 40 – B8ZS Line Coding
  • Page 41 – Signal Inversion; Channel Traffic
  • Page 44 – Framing
  • Page 45 – D4 Framing; Signaling
  • Page 47 – 4th-Channel Signaling; There are three variations of 24th-channel signaling:; Channels
  • Page 48 – Signaling Types; Tie lines to other private switches
  • Page 49 – MULTIPLEXING OUTSIDE THE SWITCH
  • Page 51 – Compressing the Signal; II; II; DDS data-port adaptors
  • Page 52 – Changing the Transmission Medium from Metallic to Fiber-Optic; Microwave System T1 Trunk Capacity; Demultiplexing
  • Page 53 – Figure 1-10. Possible Multiplexed Connections
  • Page 54 – STATISTICAL MULTIPLEXING
  • Page 55 – systems, and the switch at a central office.
  • Page 56 – attendant or ACD agents.
  • Page 57 – Special-Access Trunks; number identification service (DNIS) is a; Spectrum of Digital Services,
  • Page 58 – Advanced Private Line Termination (APLT) Trunks; CONNECTIVITY; and
  • Page 59 – Access can also be switched or nonswitched.; systems use
  • Page 60 – Signaling Protocols
  • Page 61 – System 75/G1 Administration; Trunk Type; Comm Type; Group Type; DS1 Options
  • Page 62 – INTERFACE CIRCUIT
  • Page 65 – Table 1-11. Generic 1 and Generic 2 Digital Trunks — Voice BCC
  • Page 73 – COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW
  • Page 74 – TYPES OF NETWORKS
  • Page 75 – NETWORK EVOLUTION
  • Page 76 – Software; Basic Networking Software
  • Page 77 – Trunk access through dial access codes; System 75 and Generic 1 UDP Package
  • Page 78 – switch for processing.; , System 85, and Generic 2 Multipremises Package; , System 85, or Generic 2 communications system; , System 85, and Generic 2 Multipremises package; System 75 and Generic 1 PNA Package
  • Page 79 – Distributed Communications System; Generic 2 communications systems use the data; NETWORK CALL PROCESSING; The internal dial plan recognizes the type of call being made.
  • Page 80 – communication systems.; Internal Dial Plan; Uniform Numbering; , System 85, and Generic 2 communications systems it is a separate
  • Page 81 – Figure 2-1. Internal Dial Plan Interactions; — Extension number steering — On a
  • Page 82 – the extension and RNX number to AAR for processing.; , System 85, and Generic 2 systems, the UDP function is called RNX; Auxiliary Call Information
  • Page 83 – Communications System Generic 2 Administration; Automatic Alternate Routing; System 85, or Generic 2 communications systems.
  • Page 85 – Selecting a Trunk Group
  • Page 86 – Automatic Route Selection; Analyzing the dialed number
  • Page 87 – Unauthorized calls. These ARS sends to intercept.
  • Page 88 – before processing the call further.; Modifying the Digits
  • Page 89 – NETWORK ADMINISTRATION
  • Page 90 – Table 2-2. Network Administration Terminals and Systems; Generic 2
  • Page 93 – TANDEM TIE TRUNK NETWORKS; A tandem tie trunk (TTT) network is an network of; INTERACTIONS WITH OTHER NETWORKS
  • Page 95 – OR MULTIPREMISES PACKAGES; MS/T configurations are appropriate when:
  • Page 96 – Main-Satellite Configuration; Main-satellite configurations offer the following features:
  • Page 97 – Main-Tributary Configuration; A tributary can have one or more attendant positions.
  • Page 99 – Figure 4-3. Dialing Patterns From Tributary or Satellite to Main; Figure 4-4. Dialing Patterns From Main to Satellite or Tributary
  • Page 100 – Figure 4-5. Dialing Patterns From Main to Tandem
  • Page 101 – Routing Incoming Calls; Public network calls arrive with the extension number.; Routing Outgoing Calls; From the MS/T complex to the tandem or main:
  • Page 102 – From the main to the satellite or tributary:; Other Routing Capabilities; The; No second dial tone returned at the receiving end upon seizure.
  • Page 103 – Cannot be used in an ISDN-PRI arrangement.; INTERACTIONS; PRI trunks cannot be used as tie or access trunks in an MS/T complex.
  • Page 105 – PNA PACKAGES; System 85, or Generic 1 or 2 communications system.; ETN CONFIGURATIONS; Tandem switches that accept and/or pass on call traffic
  • Page 106 – ETN TRUNKS
  • Page 108 – Access and Bypass Access Tie Trunks
  • Page 109 – FEATURES; Three features are used in the implementation of an ETN:; Uniform Numbering Plan
  • Page 110 – Figure 5-3. Private Network Uniform Numbering Plan
  • Page 112 – Extension Number Portability Clusters
  • Page 113 – Software-Defined Network; Access to SDN is either switched or nonswitched.; and 2 communications systems can fulfill these requirements.
  • Page 116 – extension number it receives.; Release Link Trunk Networks — CAS and ACD
  • Page 117 – Figure 5-8. Centralized Attendant Service; Centralized Attendant Service; communications systems.
  • Page 118 – Distributed Communications System Clusters; See chapter 6 for a detailed explanation of DCS.; ENGINEERING CONSIDERATIONS; The chapter on Designing Alternate Routing Networks in the; Communications System and System
  • Page 119 – , System 85, and Generic 2 communications systems, the link is
  • Page 120 – DCS CLUSTERS; Switch Node; DCS; DCS LINKS
  • Page 121 – Tie Trunks; Signaling Links; , System 85, and Generic 2 communications; Switch Physical; Generic 1
  • Page 122 – Transmission Media; Figure 6-2. Internally Connected DCS Signaling Channel Over a DS1
  • Page 123 – Communications System; Communications System Generic 2.1 to Generic 1.1
  • Page 124 – Linkage Design
  • Page 125 – G H
  • Page 126 – Data Service Unit
  • Page 128 – MTDM
  • Page 132 – TRANSPARENT FEATURES; Attendant Call Waiting
  • Page 133 – Table 6-3. Availability of Attendant Features; Alphanumeric Display
  • Page 134 – Group Selection button.
  • Page 135 – Alerting—Distinctive Ringing
  • Page 136 – Call Coverage Tone; Call Forwarding; Call Waiting
  • Page 137 – Audio Information Exchange (AUDIX) Features Transparency; . The enhancements are noted in the following list:
  • Page 140 – PBXs, an economical alternative to incorporating two DSUs
  • Page 141 – ADMINISTRATION CONSIDERATIONS; To determine how to administer DCS nodes, refer to the; Communications System System 75 and; Communications System System 85 and
  • Page 142 – PBX and; — Call Coverage Tone
  • Page 143 – DATA CONNECTIVITY — AN OVERVIEW
  • Page 144 – DATA COMMUNICATIONS VARIABLES; Terminals; Communications Protocols
  • Page 146 – Synchronous vs. Asynchronous
  • Page 148 – Transmission Speed
  • Page 149 – Type of Communications Channel; Creating Switch — Packet vs. Circuit Switches
  • Page 150 – Channel Assignment — Dial-up vs. Dedicated Connections
  • Page 151 – See chapter 8 for specific modem pool configurations.; SPECIAL DATA FEATURES; Terminal Dialing
  • Page 152 – Table 7-1. Data Feature vs Communications Systems
  • Page 153 – CR; Data Protection; This; Data Protection is provided in two forms:; Data Privacy; code that the user enters when placing the call.; Data Restriction; Data Only Off-Premises Extension
  • Page 155 – DATA COMMUNICATIONS CAPABILITIES
  • Page 159 – DCE POSSIBILITIES; digital service are provided at the remote end of; Voice Terminal Adjunct Data Modules
  • Page 160 – Standalone Data Modules; modification kit. With this; ADUs
  • Page 164 – MODEM POOLING CONNECTIONS
  • Page 166 – Figure 8-5. Modem Pooling over a DS1 Channel
  • Page 168 – LAN TRANSMISSION MEDIA
  • Page 169 – Communication Between the LAN and Outside DTEs
  • Page 170 – Type of
  • Page 172 – ISN Communication; Communication Between the LAN and Other Networks
  • Page 174 – The Communication System as a LAN Backup
  • Page 175 – Packet Service; APS Applications; Database searches and updates; APS Access
  • Page 176 – SDS and SDDN Applications; SDS and SDDN applications include:
  • Page 177 – Connections to the Public SDN/SDDN Circuit-Switched Data Network
  • Page 178 – Table 8-6. Requirements for Connections from the PBX to SDS/SDDN
  • Page 180 – Digital Data Service, or the SKYNET; Private Connections Through
  • Page 181 – If an MPDM is used, it must be installed with a V.35 interface and an; SW56 modification
  • Page 182 – Figure 8-19. Private Data Network with 24
  • Page 183 – Private Terrestrial Connections Through; Robbed Bit Dedicated or Data Data
  • Page 184 – Satellite Private Data Network Links
  • Page 186 – Figure 8-22. Telemarketing Gateway Configuration
  • Page 189 – DATA NETWORK ADMINISTRATION
  • Page 191 – DATA COMMUNICATIONS CONFIGURATIONS; you can configure your networks to:; modification kit. This MPDM is sometimes called the MPDM/M1* or the
  • Page 192 – DSC AND PSC CONNECTIONS; Analog line and trunk ports
  • Page 195 – SNA NODE CONNECTIONS
  • Page 196 – Switched Digital Service,; Video Teleconferencing; Switched Digital Service or the Software-Defined
  • Page 197 – Switched Digital Service or Software-Defined; FAX Transmittal; Switched Digital Service or the Software-Defined Digital
  • Page 198 – Figure 9-5. A Possible Imaging Configuration
  • Page 199 – Reference
  • Page 200 – Multiplexer to
  • Page 201 – Introduction to
  • Page 202 – Feature Translations for
  • Page 203 – PBX Systems — Application Notes —; SYSTEM 75 AND GENERIC 1
  • Page 204 – PBX Systems — Application Notes — Trunk
  • Page 205 – Sales; SYSTEM 85 AND GENERIC 2
  • Page 206 – Operation
  • Page 209 – B. SYNCHRONIZATION OF DIGITAL FACILITIES; THE NEED FOR SYNCHRONIZATION
  • Page 211 – SYNCHRONIZATION HIERARCHY
  • Page 217 – Blue alarm means that the switch cannot be used as a reference.
  • Page 219 – CHANGES TO THE SCS SOFTWARE MADE AVAILABLE VIA SOFTWARE PATCHES
  • Page 220 – System 75 and Generic 1 Synchronization Software Operation; On-line synchronization reference failure
  • Page 221 – system status
  • Page 222 – The DS1 reference determines that the LOS error no longer exists.; The External Synchronization Clock
  • Page 223 – and secondary references also apply to these references.
  • Page 226 – NETWORK SYNCHRONIZATION AND ENGINEERING; The primary goals of network synchronization are:; Selecting a Timing Source for the Switch
  • Page 228 – EXAMPLE FOR RULE 1; Figure B-12. Nonpublic Network without Digital Switches
  • Page 229 – EXAMPLE FOR RULE 2; Figure B-13. Proper Use of Backup Facilities
  • Page 230 – Figure B-14. Improper Use of Backup Facilities; record
  • Page 231 – EXAMPLE FOR RULE 4
  • Page 232 – Figure B-16. Less Than Optimal Diverse Routing; EXAMPLE FOR RULE 6
  • Page 234 – EXAMPLE FOR RULE 7; Figure B-19. Excessive Synchronization from One Node
  • Page 235 – Figure B-20. Minimized Synchronization from One Node
  • Page 236 – AVAILABILITY OF SYNCHRONIZATION SOURCES; AT&T communications can provide the synchronization source.; Misconception 3
  • Page 237 – CONCLUSIONS ON SYNCHRONIZATION
  • Page 238 – USE OF GENERIC 1 AS A SYSTEM CLOCK REFERENCE
  • Page 241 – C. TRUNKING TERMS AND CAPABILITIES; FREQUENTLY USED TERMS; Address
  • Page 242 – Alerting Signals; Bypass Tie Trunk
  • Page 243 – CCSA (or Common Control Switching Arrangement); PBX LC11 circuit pack may be optioned to provide DX signaling.
  • Page 245 – Derived E&M Lead Signaling
  • Page 246 – Direct Access
  • Page 247 – ETN Trunking Facilities
  • Page 248 – Glare
  • Page 249 – opposite for the trunk to work at all.
  • Page 250 – 00-milliseconds——for; PBX
  • Page 251 – Main PBX; PBX, this term refers to the 70 series of trunk types that are; this type of signaling.
  • Page 252 – Reverse Battery
  • Page 253 – Signaling Type
  • Page 254 – For; Type of Dialing; Universal Trunk Type
  • Page 256 – SUGGESTIONS AND HELPFUL HINTS; Wink Start is the most frequently used start-dial signal; ground start trunk circuits do not have this requirement.; PBX and over digital facilities
  • Page 257 – TRUNKING CHARACTERISTICS TABLE
  • Page 258 – DIMENSION PBX
  • Page 259 – Trunk class may be either PF or PFLASH.
  • Page 260 – SWITCH A
  • Page 273 – D. COMMUNICATIONS PROTOCOLS; European Computer Manufacturers Association (ECMA)
  • Page 274 – OSI MODEL
  • Page 277 – Session Layer; Names of digital standards formulated by the CCITT start with X.; CCITT Standards
  • Page 278 – Name Title; International user classes of service in public data networks
  • Page 279 – International alphabet no. 5
  • Page 281 – Other Common Standards; Layer 1 protocols include:
  • Page 282 – OSI ISO
  • Page 283 – Digital Multiplexed Interface; Communications System Generic 2 and System 75 and
  • Page 284 – —Requires a ‘‘circuit-switched’’ transmission facility
  • Page 286 – Data Mode 2
  • Page 288 – Data Mode 3; Digital Communications Protocol
  • Page 289 – Table D-5. DCP versus ISDN-BRI protocol parameters comparison
  • Page 290 – DCIU
  • Page 291 – Application Layer. This layer is named but not regulated in BX.25.
  • Page 301 – F. NETWORKING FEATURES——AVAILABILITY MATRIX
  • Page 303 – NETWORKING FEATURES——AVAILABILITY MATRIX (Contd)
  • Page 307 – ABBREVIATIONS
  • Page 313 – GLOSSARY; See Automatic Call Distribution.
  • Page 314 – analog
  • Page 315 – AUDIX Standalone; Communications System Generic 2 only); AVD
  • Page 316 – An information carrying channel on an ISDN interface.; See binary synchronous communications.
  • Page 317 – See basic rate interface.; ’e Consultatif International Telephonique et Telegraphique) an
  • Page 318 – See 24th channel signaling.
  • Page 319 – CSU; data channel
  • Page 320 – See data communications interface unit.
  • Page 321 – See Direct Department Calling.
  • Page 322 – digital transmission
  • Page 323 – See digital multiplexed interface with bit-oriented signaling.
  • Page 324 – See electronic tandem network.; A function or service provided by a hardware or software product.; See Front End Processor.
  • Page 326 – Permanently connected via hardware.; See hybrid telephone.
  • Page 328 – manual dialing; AT&T’s tariffed digital 800-service offering for inward calling.; modem
  • Page 329 – See modular processor data module.
  • Page 330 – See Open Systems Interconnection reference model.
  • Page 331 – PDM
  • Page 332 – public network
  • Page 333 – See Synchronous Data Link Control.
  • Page 334 – A version of HDLC designed by IBM for use between their equipment.; See synchronous data transmission.; The switched connection of an incoming trunk to an outgoing trunk.
  • Page 335 – Two copper wires used for the transmission of voice and/or data.
  • Page 336 – WATS trunk
  • Page 337 – INDEX; access trunk—Contd
  • Page 338 – reference frequency B-28
  • Page 339 – compression—Contd
  • Page 340 – DMI
  • Page 341 – internal dial plan—Contd
  • Page 342 – multiplexing—Contd; development steps B-29
  • Page 343 – network—Contd
  • Page 345 – signaling—Contd
  • Page 347 – trunk—Contd; voice
Loading the manual

AT&T 555-025-201

DEFINITY

®

Communications System

Network and Data Connectivity

"Loading the manual" means you need to wait until the file loads and becomes available for online reading. Some manuals are very large, and the time they take to appear depends on your internet speed.

Summary

Page 3 - CONTENTS

CONTENTS _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ A AB BO OU UT T T TH HI ...

Page 15 - xv

CONTENTS xv _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ _ ______________________________________________________________________________________ Table 8-8. Requiremen...

Page 16 - xvi

xvi CONTENTS _ ___________________________________________________________________________________________________________________________ _ ___________________________________________________________________________________________________________________________ _ _________________________________...

Other AT&T Models

All AT&T Other