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Interoperability 179
IP Telephony Configuration Guide
3.0/3.0.1 GA Gatekeeper
• Officially Business Communications Manager supports RadVision ECS 2.1.0.1 and
CSE 1000 as gatekeepers. It does not support the Radvision Dialing plan package.
• Radvision ECS 2.1.0.1 gatekeeper limitations: ECS does not support fast start in the Call
Setup (Q.931) and Call Control (H.245) routing mode.
Note: M1-IPT (required for networks with Business Communications Managers running
3.5 software) does not support a Radvision gatekeeper.
Call signaling
By selecting GatekeeperRouted or GatekeeperResolved you switch Business
Communications Manager to gatekeeper mode, which means your Remote Gateway table
will no longer be a part of your call routing plan. Choosing one of the modes will advertise a
Business Communications Manager preference. The Gatekeeper is the final decisionmaker.
It will select the mode (routed or resolved) based on its configuration.
• GatekeeperRouted routes the Call Setup Channel and Control Channel through the
ECS. In ECS terminology this mode is called Call Setup Q.931 and Call Control h.245
• GatekeeperResolved routes the Call Setup Channel and Control Channel directly to the
far-end without ECS intervention. In ECS terminology this mode is called Direct. By
using this method you will speed up you call setup time. This is the recommended
configuration for the Business Communications Manager.
ECS Configuration:
• Accept calls – this must be enabled so that calls pass through the ECS Gatekeeper.
• Routing Mode – it is recommended that you set this to Direct to minimize call setup time.
The Business Communications Manager also supports routing of Setup(Q.931) and Call
Control(H.245).
Important: The Business Communications Manager does NOT support the second
option – the routing of Setup(Q.931). The option, Check that call is active every XXX
seconds, must be unchecked.
• Force Direct For Service Calls – this setting (on the Settings, Advanced tab) should be
enabled if the ECS Gatekeeper has been configured to use Direct call routing.
ITG version 26.26 does not include support for gatekeeper interaction. To be able to
establish calls between Business Communications Manager 3.0 and ITG through a
gatekeeper, follow the configuration steps found in the “Using a gatekeeper” on page 127.
3.0.1 and prior If these systems are running in a private network with systems running BCM 3.5 or later
software, they must have QoS patch 3.0.0.25 (or later) installed to allow H.323 VoIP trunking
to function correctly.
3.0.1 and prior SIP trunks
SIP trunks can only be set up between two Business Communications Manager systems if
both systems are running BCM version 3.5 or later software.
3.0.1 and prior Dialing protocols, MCDN networks
Do not support the M1 requirement for specific tags for Local, National, and International
calls tandemned over a Business Communications Manager network to the public network.
3.0.1 and prior Does not support the T.38 fax protocol.
Table 46 Software interoperability restrictions and limitations for IP trunking (Continued)
Software release Description of restriction/limitation
- Business Communications 1
- Manager 3.5 1
- IP Telephony Configuration 1
- Trademarks 2
- Contents 3
- Chapter 4 4
- Chapter 5 5
- Chapter 6 5
- Before you begin 13
- Symbols used in this guide 13
- Text conventions 14
- Acronyms 15
- Related publications 16
- How to get help 17
- APAC (Asia Pacific) 18
- Technical Support - CTAS 18
- Chapter 1 19
- Introduction 19
- IP telephones and VoIP trunks 20
- Figure 1 Network diagram 22
- Telephones 23
- Gatekeepers on the network 24
- IP network 24
- Key IP telephony concepts 25
- Jitter Buffer 26
- QoS routing 27
- Chapter 2 29
- Prerequisites checklist 29
- Network devices 30
- Network assessment 30
- Resource assessment 31
- Keycodes 31
- Figure 2 Global IP settings 33
- VoIP trunks 36
- IP telephone records 37
- Chapter 3 39
- Installing IP telephones 39
- Choosing a codec 43
- Choosing a Jitter Buffer 43
- Before installing 44
- Using a 3-port switch 44
- Other troubleshooting tips 49
- Configuring DHCP 50
- IP telephony DHCP notes 51
- Checking IP server status 53
- Figure 7 IP Terminal status 54
- 6 Click the Save button 55
- Using the Hot Desking feature 58
- Notes about Hot Desking 59
- Customizing feature labels 60
- Moving IP telephones 65
- Figure 16 i2050 Switch type 68
- Access points 70
- Handset and call functions 70
- Configuring NetVision records 71
- Assigning general settings 72
- Testing the handset functions 76
- Changing a handset Name 78
- Deregistering a telephone 79
- Configuring local VoIP trunks 81
- Published IP address 82
- Configuring media parameters 85
- Setting up the local gateway 87
- P0604630 03 100
- Outgoing call configuration 101
- PSTN call to remote node 103
- Call process 104
- Describing a fallback network 106
- Figure 34 Route XXX screen 108
- Figure 35 VoIP schedule 110
- How it works 112
- Setting up the VoIP schedule 114
- Connecting an i200X telephone 119
- Quality of Service Monitor 120
- PSTN fallback metrics 121
- Chapter 7 123
- Modifying PortRanges 125
- Using a gatekeeper 127
- Gatekeeper call scenarios 133
- Faxing over VoIP lines 134
- Chapter 8 139
- WarehouseHead Office 140
- Appendix A 145
- Efficient Networking 145
- Network engineering 146
- LAN engineering examples 150
- WAN engineering 150
- (8 kb/s) 151
- Setting Non-linear processing 152
- Enough link capacity 155
- Not enough link capacity 155
- Further network analysis 156
- Reduce link delay 157
- Reducing hop count 157
- Routing issues 158
- Appendix B 161
- Silence compression 161
- Time -> 163
- Bandwidth -> 163
- Channel/Link Max 163
- Comfort noise 166
- Appendix C 167
- Network performance utilities 167
- Appendix D 169
- Interoperability 169
- Speech path setup methods 170
- Media path redirection 171
- Gatekeeper 171
- No feedback busy station 172
- Interoperability 173 173
- 174 Interoperability 174
- Using VLAN on the network 175
- 176 Interoperability 176
- Symbol NetVision telephones 177
- 178 Interoperability 178
- Interoperability 179 179
- 180 Interoperability 180
- Interoperability 181 181
- 182 Interoperability 182
- Appendix E 183
- Quality of Service 183
- 184 Quality of Service 184
- Measuring Intranet QoS 185
- Recording routes 186
- Adjusting Ping measurements 187
- Measurement procedure 188
- Quality of Service 189 189
- Traffic mix 190
- TCP traffic behavior 190
- Network Quality of Service 191
- Network monitoring 192
- Quality of Service parameters 192
- Fallback to PSTN 193
- 194 Quality of Service 194
- Glossary 195
- 196 Glossary 196
- Glossary 197 197
- 198 Glossary 198
- Glossary 199 199
- 200 Glossary 200
- Glossary 201 201
- 202 Glossary 202
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