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Configuring Dial Services
2-2 114062 Rev. A
ISDN is primarily a dial service that uses switched connections as circuits. This
means that you can use channels and services on an as-needed basis instead of
having a connection up all the time, regardless of need. This choice ensures a
cost-effective use of phone lines as well as bandwidth efficiency.
ISDN Standards
The ITU-T (formerly CCITT) has defined a set of standards to ensure universal
implementation of ISDN technology. The next sections detail the following ISDN
standards:
• Basic Rate Interface (BRI)
• Primary Rate Interface (PRI)
• The B channel
• The D channel
Basic Rate Interface
The Basic Rate Interface (BRI) transmits data at a rate of 64 Kb/s over each of two
bearer channels, also called B channels, which are dedicated to data transmission.
Along with the two B channels, BRI uses one data channel called the D channel.
The D channel handles all signaling information such as call setup requests. It
transmits this information at a rate of 16 Kb/s.
The networking industry also refers to BRI service as 2B + D, to denote the
combination of the two B channels and one D channel. These three channels are
combined into one physical, twisted-pair line that terminates at your premises and
that provides a total of 144 Kb/s bandwidth
(Figure 2-2).
Figure 2-2. Conceptual Drawing of BRI
2B + D
B channel
B channel
D channel
64 Kb/s
64 Kb/s
16 Kb/s
144 Kb/s
DS0008A
- Configuring Dial 1
- Services 1
- Bay Networks Software License 3
- Contents 5
- 114062 Rev. A vii 7
- 114062 Rev. A ix 9
- 114062 Rev. A 10
- 114062 Rev. A xi 11
- 114062 Rev. A xiii 13
- 114062 Rev. A xv 15
- 114062 Rev. A xvii 17
- About This Guide 19
- Audience 20
- Before You Begin 20
- Conventions 21
- Acronyms 22
- 114062 Rev. A xxiii 23
- 114062 Rev. A xxv 25
- Bay Networks Customer Service 26
- World Wide Web 27
- Customer Service FTP 27
- Support Source CD 28
- CompuServe 28
- InfoFACTS 29
- How to Get Help 29
- Chapter 1 31
- Dial Services Overview 31
- DS0005A 32
- Dial-on-Demand Service 33
- Demand Lines and Pools 34
- 192.32.14.0 35
- 192.32.16.0 35
- Activating Demand Circuits 36
- Terminating Demand Circuits 38
- Dial Backup Service 39
- Primary Line 40
- Backup Line 40
- 1-12 114062 Rev. A 42
- Backup Lines and Pools 43
- 1-14 114062 Rev. A 44
- Activating the Backup Line 45
- 1-16 114062 Rev. A 46
- Bandwidth-on-Demand Service 47
- 1-18 114062 Rev. A 48
- Activating Secondary Lines 50
- Terminating Secondary Lines 50
- Chapter 2 53
- ISDN Overview 53
- ISDN Standards 54
- Primary Rate Interface 55
- The D Channel 55
- 2-4 114062 Rev. A 56
- Figure 2-3. LAPD Frame 56
- ISDN Interfaces 57
- Reference Points 58
- 2-8 114062 Rev. A 60
- Chapter 3 61
- Implementation Notes 61
- Types of Authentication 62
- 114062 Rev. A 3-3 63
- 3-4 114062 Rev. A 64
- Asynchronous PPP 66
- ISDN Services 68
- 114062 Rev. A 3-9 69
- 3-10 114062 Rev. A 70
- 114062 Rev. A 3-11 71
- 3-12 114062 Rev. A 72
- 114062 Rev. A 3-13 73
- Call Screening 74
- Rate Adaption 74
- Example 1 75
- Example 2 75
- 3-16 114062 Rev. A 76
- Chapter 4 77
- PPP Multilink 78
- Static Routes 79
- Traffic Filters 80
- Dial Optimized Routing 81
- 4-6 114062 Rev. A 82
- Protocol Prioritization 83
- Chapter 5 85
- Bandwidth for Backup Circuits 86
- 114062 Rev. A 5-3 87
- 5-4 114062 Rev. A 88
- 114062 Rev. A 5-5 89
- 5-6 114062 Rev. A 90
- 114062 Rev. A 5-7 91
- 5-8 114062 Rev. A 92
- Chapter 6 93
- 6-2 114062 Rev. A 94
- 6-4 114062 Rev. A 96
- 114062 Rev. A 6-5 97
- Chapter 7 99
- Caution: 100
- Pool ID Parameter 107
- Configuring Dial Services 108
- Creating Line Pools 109
- Adding Line Pools 110
- Configuring ISDN Lines 115
- PRI Physical Interfaces 117
- 7-20 114062 Rev. A 118
- 7-22 114062 Rev. A 120
- 7-24 114062 Rev. A 122
- 123
- 124
- 126
- 128
- 129
- 7-32 114062 Rev. A 130
- 131
- 7-34 114062 Rev. A 132
- 137
- 7-40 114062 Rev. A 138
- 7-42 114062 Rev. A 140
- Configuring ISDN Logical Lines 141
- 7-44 114062 Rev. A 142
- 7-46 114062 Rev. A 144
- 114062 Rev. A 7-47 145
- 7-48 114062 Rev. A 146
- 7-50 114062 Rev. A 148
- Local Phone Number Parameters 149
- 7-52 114062 Rev. A 150
- 114062 Rev. A 7-53 151
- Changing Pool IDs and Lines 153
- 114062 Rev. A 7-57 155
- 7-58 114062 Rev. A 156
- 114062 Rev. A 7-59 157
- 7-60 114062 Rev. A 158
- 114062 Rev. A 7-63 161
- 114062 Rev. A 7-65 163
- Chapter 8 165
- Configuring Demand Circuits 165
- Interface for Dialup Lines 167
- Demand Circuit Parameters 169
- Configuring Demand Circuits 171
- 184
- Deleting Demand Circuits 186
- 114062 Rev. A 8-23 187
- 8-24 114062 Rev. A 188
- 4. Click on OK to save 188
- 8-26 114062 Rev. A 190
- 8-28 114062 Rev. A 192
- 114062 Rev. A 8-29 193
- Chapter 9 197
- Configuring Backup Circuits 197
- Circuit Options Parameters 202
- Configuring Backup Circuits 205
- Interface Type Parameter 211
- 219
- 219
- 220
- 9-26 114062 Rev. A 222
- 9-28 114062 Rev. A 224
- 227
- 228
- 228
- 9-34 114062 Rev. A 230
- 114062 Rev. A 9-35 231
- (Figure 232
- Deleting Backup Circuits 234
- Chapter 10 235
- Congestion Monitor Parameters 247
- Deleting Bandwidth Circuits 255
- Chapter 11 257
- Configuring Phone Lists 257
- Configuring Phone Lists 263
- Chapter 12 273
- Configuring Caller Resolution 273
- Configuring Caller Resolution 277
- Appendix A 281
- Configuration Examples 281
- Dial-on-Demand Using PPP 282
- Table A-3. IP Parameters 284
- A-4 114062 Rev. A 284
- Phone List window 285
- A-6 114062 Rev. A 286
- Configuration of Router 1 287
- Configuration of Router 2 288
- Configuration Examples 289
- Table A-10. Demand Pools 289
- A-10 114062 Rev. A 290
- Table A-14. IP Parameters 291
- A-12 114062 Rev. A 292
- A-16 114062 Rev. A 296
- Table A-23. IP Parameters 297
- A-20 114062 Rev. A 300
- Table A-26. Backup Pools 300
- A-22 114062 Rev. A 302
- Appendix B 305
- B-4 114062 Rev. A 308
- B-6 114062 Rev. A 310
- B-8 114062 Rev. A 312
- Appendix C 313
- Ordering PRI Lines 314
- 114062 Rev. A Index-1 315
- 114062 Rev. A Index-3 317
- 114062 Rev. A Index-5 319
- 114062 Rev. A Index-7 321
- 114062 Rev. A Index-9 323
- 114062 Rev. A Index-11 325
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