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Chapter 1 Introduction 21
IP Telephony Configuration Guide
VoIP trunks and analog/digital telephones
While analog and digital telephones cannot be connected to the Business Communications
Manager 2.5 system with an IP connection, they can make and receive calls to and from other
systems through VoIP trunks. Calls from IP telephones to system telephones are received through
the LAN or WAN card and are translated within the Business Communications Manager to voice
channels.
VoIP trunks and IP telephones
The IP telephones connect to the Business Communications Manager across an IP network
through either on a LAN or a WAN. From the Business Communications Manager connection,
they can then use standard lines or VoIP trunks to communicate to other telephones on other public
or private networks.
Gatekeeper
A gatekeeper tracks IP addresses of specified devices, and provides authorization for making and
accepting calls for these devices. A gatekeeper is not required for the Business Communications
Manager 2.5 system, but can be useful on networks with a large number of devices. Referring,
again, to Figure 1 on page 19, for example: Digital telephone A wants to call IP telephone B,
through Business Communications Manager B, which is under the control of the gatekeeper.
Digital telephone A sends a request to the gatekeeper. The gatekeeper, depending on how it is
programmed, provides Digital telephone A with the information it needs to contact IP telephone B.
IP network
In the network shown in Figure 1 on page 19, several LANs and a WAN are shown. When
planning your network, be sure to consider all requirements for a data network. Your network
administrator should be able to advise you about the network setup and how the Business
Communications Manager fits into the network.
WAN
A Wide Area Network (WAN) is a communications network that covers a wide geographic area,
such as state or country. For Business Communications Manager 2.5, a WAN is any IP network
connected to a WAN card on the Business Communications Manager 2.5 system. This may also be
a direct connection to another Business Communications Manager 2.5 system.
If you want to deploy IP telephones or NetVision telephones that will be connected to a LAN
outside of the LAN that the Business Communications Manager is installed on, you must ensure
the Business Communications Manager has a WAN connection. This includes ensuring that you
obtain IP addresses and routing information that allows the remote telephones to find the Business
Communications Manager, and vice versa.
- Business Communications 1
- Manager 2.5 1
- IP Telephony Configuration 1
- Trademarks 2
- Contents 3
- Chapter 4 4
- Chapter 5 5
- Chapter 6 6
- Appendix A 6
- 12 Tables 12
- Before you begin 13
- Symbols used in this guide 13
- Text conventions 14
- Acronyms 14
- Related publications 15
- How to get help 16
- Chapter 1 17
- Introduction 17
- IP telephones and VoIP trunks 18
- Figure 1 Network diagram 19
- Telephones 20
- IP network 21
- Key IP telephony concepts 22
- Jitter Buffer 23
- QoS routing 23
- Chapter 2 25
- Prerequisites checklist 25
- Network assessment 26
- Resource assessment 27
- Keycodes 27
- Defining published IP address 28
- IP telephones 30
- NetVision wireless telephones 30
- Chapter 3 31
- Installing IP telephones 31
- Choosing a codec 33
- Choosing a Jitter Buffer 34
- Before installing 34
- Using a 3-port switch 35
- NORTEL NETWORKS 36
- Manual Cfg DHCP(0 no, 1 yes) 36
- Field Value Description 37
- Slow connection 40
- One-way or no speech paths 40
- Dropped voice packets 40
- Changing the contrast level 40
- Configuring DHCP 41
- Figure 5 IP Terminal status 42
- Figure 6 Configuration menu 42
- Figure 8 Configuration menu 44
- Download Pending 44
- Customizing feature labels 46
- Moving IP telephones 47
- Keep DN alive 48
- Figure 12 i2050 Switch type 49
- 7 Click on the BCM option 50
- Configuring NetVision records 52
- /symbol.com> 53
- <http:/ 53
- Testing the handset functions 55
- Changing a handset Name 57
- Configuring VoIP trunks 59
- Configuring media parameters 60
- Setting silence compression 61
- Setting jitter buffers 62
- Outgoing call configuration 63
- Figure 18 Trunk/Line data 64
- Configuring a remote gateway 66
- Configuring PSTN fallback 68
- Enabling PSTN fallback 69
- Setting up the VoIP schedule 69
- Configuring routes 70
- Figure 26 VoIP schedule 73
- Activating the VoIP schedule 74
- Turning on QoS monitor 75
- Incoming call configuration 76
- Example configuration 78
- Making calls 82
- Connecting an i200X telephone 83
- Quality of Service Monitor 86
- Port settings 86
- Using firewalls 87
- Using a gatekeeper 88
- The call signaling method 89
- Gatekeeper call scenarios 91
- Typical applications 93
- Setting up the system 95
- Efficient Networking 99
- Network engineering 100
- LAN engineering examples 103
- WAN engineering 104
- Setting Non-linear processing 105
- (8 kb/s) 106
- P0937663 03.1 106
- Traceroute 106
- Enough link capacity 107
- Not enough link capacity 107
- Further network analysis 108
- Reduce link delay 109
- Reducing hop count 109
- Adjust the jitter buffer size 110
- Reduce packet errors 110
- Routing issues 111
- Appendix B 113
- Silence compression 113
- Comfort noise 116
- Appendix C 117
- Network performance utilities 117
- Appendix D 119
- Interoperability 119
- Speech path setup methods 120
- Media path redirection 120
- Gatekeeper 120
- Symbol NetVision telephones 121
- 122 Interoperability 122
- Appendix E 123
- Quality of Service 123
- Measuring Intranet QoS 124
- Recording routes 125
- Adjusting Ping measurements 126
- Measurement procedure 127
- 128 Quality of Service 128
- Traffic mix 129
- TCP traffic behavior 129
- Network Quality of Service 130
- Quality of Service parameters 131
- Fallback to PSTN 132
- Glossary 133
- 134 Glossary 134
- Glossary 135 135
- 136 Glossary 136
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