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120 Chapter 6 Setting up VoIP trunks for outgoing calls
P0604630 03
Quality of Service Monitor
The Quality of Service Monitor is an application that monitors the quality of the IP channels. It
does this by performing a check every 15 seconds. The QoS Monitor determines the quality of the
intranet based on threshold tables for each codec. If the QoS Monitor is enabled, and it determines
that the quality of service falls below the indicated threshold, it will trigger fallback to PSTN. For
information about setting up the system to use QoS and fallback to PSTN, see “Setting up VoIP
trunks for fallback” on page 105.
Bandwidth required for QoS monitor: There are monitoring packets that are sent back and forth
between any two Business Communications Managers that are configured with each other as
remote gateway entries, to determine the available bandwidth for VoIP phone calls. These packets
are 88 bytes in length, and are sent 100 times a minute, at evenly spaced intervals, in each
direction. The bandwidth required for this monitoring is then 2 X 100 X 88 bytes / 60 seconds =
293 bytes/second or 2346 bits/second, in each direction, for a total of 586 bytes/second or 4693
bits/second.
Quality of Service Status
The QoS Status displays the current network quality described as a Mean Opinion Score (MOS)
for each IP destination. A pull-down menu allows the administrator to view the MOS mapping.
The table below shows a sample QoS Monitor.
Table 28 QoS status
Updating the QoS monitor data
To update the table with the most current values:
From the View menu, select Refresh.
Warning: Network note: All systems in a private network must be running BCM 3.5 or
later software or have the QoS 3.0.0.25 or later patch. Business Communications
Managers running BCM 3.0.1. or earlier software without installing the patch will be
unable to support the BCM 3.5 H.323 trunks.
IP
QoS
Monitor
G.711
aLaw
G.711
uLaw
G.723.1 5.3
kbit/s
G.723.1 6.3
kbit/s
G.729
Tx Rx Tx Rx Tx Rx Tx Rx Tx Rx
47.192.5.2 Enabled 4.00 4.30 4.00 4.30 4.80 4.90 4.75 4.70 4.50 4.50
47.192.5.6 Disabled N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Note: For the QoS monitor and PSTN fallback to function, both Business
Communications Managers must list each other as a Remote Gateway and QoS Monitor
must be enabled on both systems.
- 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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