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Interoperability 189
IP Telephony Configuration Guide
• SIP trunks do not support the MCDN networking protocol
• Business Communications Manager call redirection and conferencing are supported
• a third-party SIP parser is used for encoding and decoding -- oSIP from GNU software
• SIP trunks are available between Business Communications Managers running BCM 3.5 or
newer software.
T.38 fax restrictions and requirements
Hardware restriction: IP telephony, including T.38 fax cannot operate on a system that has PEC
Is installed on the MSC.
The following is a list of restrictions and requirements for the T.38 fax protocol.
Table 49 T.38 restrictions and requirements
Supported Not supported
only UDP transport MCDN
only UDP redundancy TCP
T.38 version 0 Forward Error Correction (FEC)
on H.323 VoIP trunks between BCMs or between
BCMs and Meridian 1-IPT
Fill removal
MMR transcoding
JBIG transcoding
Norstar systems
SIP trunking
Resource limitations
T.38 fax transactions require significant DSP resources. They use the same resources as the fax/modem
task. Each task consumes one DSP; or two DSPs if the session terminates on an application port, such as
voice mail. Heavy fax traffic could affect IP telephone service if a number of faxes simultaneously come in
on shared DSPs. Refer to the Programming Operations Guide, MSC section, for details about setting up
DSP configuration.
- Business Communications 1
- Manager 3.6 1
- IP Telephony Configuration 1
- Trademarks 2
- Contents 3
- Chapter 3 4
- Chapter 4 4
- Chapter 5 5
- 10 Contents 10
- P0609327 02 10
- Before you begin 15
- Symbols used in this guide 15
- Text conventions 16
- Acronyms 17
- Related publications 18
- How to get help 19
- 20 Preface 20
- Chapter 1 21
- Introduction 21
- IP telephones and VoIP trunks 22
- Figure 1 Network diagram 24
- Telephones 25
- Gatekeepers on the network 25
- IP network 26
- Key IP telephony concepts 27
- Jitter Buffer 28
- QoS routing 29
- Chapter 2 31
- Prerequisites checklist 31
- Network devices 32
- Network assessment 33
- Resource assessment 33
- Keycodes 34
- Option Description 35
- VoIP trunks 39
- IP telephone records 40
- Installing IP telephones 41
- Choosing a codec 45
- Choosing a Jitter Buffer 46
- Before installing 46
- Using a 3-port switch 46
- Display buttons 48
- Troubleshooting IP telephones 51
- Operation issues 52
- Configuring DHCP 53
- IP telephony DHCP notes 54
- Checking IP server status 56
- Figure 7 IP Terminal status 57
- Notes about Hot Desking 62
- Customizing feature labels 63
- Moving IP telephones 69
- Figure 16 i2050 Switch type 72
- Handset and call functions 74
- Configuring NetVision records 75
- Assigning general settings 76
- Changing a handset Name 82
- Deregistering a telephone 83
- Configuring local VoIP trunks 85
- Published IP address 86
- Counting IP trunks 87
- Configuring media parameters 89
- Setting up the local gateway 91
- How to use target lines 98
- Configuring target lines 99
- Chapter 6 101
- Field Value Description 104
- 6 Click the Save button 105
- Outgoing call configuration 107
- H.323 trunks 108
- SIP trunks 108
- Keycodes: 2 108
- PSTN call to remote node 109
- Call process 110
- Describing a fallback network 113
- Adding routes for fallback 114
- Figure 35 Route XXX screen 115
- Figure 36 VoIP schedule 117
- How fallback routing works 120
- Settings for 124
- Santa Clara 124
- Connecting an i200X telephone 125
- PSTN fallback metrics 126
- Quality of Service Monitor 127
- Updating the QoS monitor data 128
- Chapter 7 129
- 3 Enter the port settings 130
- Modifying PortRanges 131
- Using a gatekeeper 133
- 8 Click Submit 140
- Gatekeeper call scenarios 141
- Faxing over VoIP lines 142
- Chapter 8 147
- WarehouseHead Office 148
- Appendix A 153
- Efficient Networking 153
- Network engineering 154
- LAN engineering examples 157
- WAN engineering 158
- Setting Non-linear processing 159
- Enough link capacity 161
- Further network analysis 162
- Components of delay 163
- Reduce link delay 163
- Reducing hop count 164
- Adjust the jitter buffer size 164
- Reduce packet errors 164
- Routing issues 165
- Appendix B 167
- Silence compression 167
- Time -> 169
- Bandwidth -> 169
- Channel/Link Max 169
- Comfort noise 172
- Appendix C 173
- Network performance utilities 173
- Appendix D 175
- Interoperability 175
- Speech path setup methods 176
- Media path redirection 177
- Gatekeeper 177
- No feedback busy station 178
- Interoperability 179 179
- 180 Interoperability 180
- Using VLAN on the network 181
- 182 Interoperability 182
- Symbol NetVision telephones 183
- 184 Interoperability 184
- Interoperability 185 185
- 186 Interoperability 186
- Interoperability 187 187
- 188 Interoperability 188
- Interoperability 189 189
- 190 Interoperability 190
- Appendix E 191
- Quality of Service 191
- 192 Quality of Service 192
- Measuring Intranet QoS 193
- Recording routes 194
- Adjusting Ping measurements 195
- Measurement procedure 196
- Quality of Service 197 197
- Traffic mix 198
- TCP traffic behavior 199
- Network Quality of Service 200
- Quality of Service parameters 201
- Fallback to PSTN 201
- 202 Quality of Service 202
- Glossary 203
- 204 Glossary 204
- Glossary 205 205
- 206 Glossary 206
- Glossary 207 207
- 208 Glossary 208
- Glossary 209 209
- 210 Glossary 210
- 222 Index 222
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