Avaya BCM 2.5 IP Telephony Guia de Configuração Página 80
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80 Chapter 4 VoIP Trunk Configuration
P0937663 02.0
Using a gatekeeper
The Business Communications Manager supports the use of an ITU-H323 gatekeeper. A
gatekeeper is a third-party software application residing somewhere on the network, which
provides services such as:
• address translation
• admission control (ARQ)
• bandwidth control
• zone management
H.323 endpoints such as the Business Communications Manager are configured with one or more
alias names that are registered with the gatekeeper. The gatekeeper stores the alias-IP mapping
internally and uses them to provide alias to IP address translation services. Later if an endpoint's
IP address changes, that endpoint has to re-register it with the gatekeeper.
See the gatekeeper software documentation for information about changing IP addresses.
The call signalling method
The call signalling method defines how the Business Communications Manager prefers call
signalling information to be directed. Call signaling establishes and disconnects a call. The
Business Communications Manager can use three types of call signalling:
• Direct: Under the direct call signalling method, call signalling information is passed directly
between endpoints. The remote gateway table in the Unified Manager contains a mapping of
phone numbers which the Business Communications Manager uses to perform DN to IP
address resolution.
• Gatekeeper Resolved: Gatekeeper Resolved signalling uses a gatekeeper for call permission
and address resolution. All call signalling occurs directly between H.323 endpoints. In effect,
the gateway requests that the gatekeeper resolves the phone numbers into IP addresses, but the
gatekeeper is not involved in call signalling.
• Gatekeeper Routed: Gatekeeper Routed signalling uses a gatekeeper for call permission and
address resolution. In this method, call signalling is directed through the gatekeeper.
For information on changing the call signalling method, see “Alias names” on page 80.
Alias names
One or more alias names may be configured for a Business Communications Manager. Alias
names are comma delimited, and may be one of the following types:
Note: The Business Communications Manager can request a method for call
signaling, but whether this request is granted depends on the configuration of the
gatekeeper. Ultimately, the gatekeeper decides which call signalling method to
use.
- Business Communications 1
- Manager 2.5 1
- IP Telephony Configuration 1
- Trademarks 2
- Contents 3
- Chapter 4 4
- Chapter 5 5
- Appendix A 5
- Before you begin 13
- Symbols used in this guide 14
- Text conventions 14
- Acronyms 15
- UDP User Datagram Protocol 16
- WAN Wide Area Network 16
- Related publications 17
- How to get help 18
- Chapter 1 19
- Introduction 19
- The IP telephony network 20
- Chapter 1 Introduction 21 21
- Figure 1 Network diagram 21
- Telephones 22
- IP Network 22
- Key IP Telephony Concepts 23
- Jitter Buffer 24
- QoS routing 24
- Chapter 1 Introduction 25 25
- 26 Chapter 1 Introduction 26
- Chapter 2 27
- Prerequisites checklist 27
- Network assessment 28
- Resource Assessment 28
- Keycodes 29
- IP Telephones 30
- Chapter 3 31
- Installing IP Telephones 31
- Choosing a codec 33
- Choosing a Jitter Buffer 33
- Before Installing 34
- Manual Cfg DHCP(0 no, 1 yes) 35
- Configuring DHCP 38
- Figure 4 DHCP summary 39
- Figure 5 DHCP range 40
- Figure 6 IP Terminal status 41
- Figure 7 Configuration menu 42
- Figure 9 IP Terminal Status 43
- Download Pending 44
- Deregistering offline DNs 45
- Moving IP telephones 46
- H.323 devices 47
- 4 Click the Save button 49
- VoIP Trunk Configuration 51
- Configuring media parameters 53
- Configuring codecs 54
- Setting Silence Compression 54
- Setting Jitter Buffers 55
- Outgoing call configuration 56
- Figure 21 Trunk/Line data 57
- Figure 22 Line pool 58
- Configuring a remote gateway 59
- Configuring PSTN fallback 60
- Setting up a VoIP schedule 61
- Vo I P 62
- Configuring routes 63
- Figure 28 Route list 64
- Figure 29 Add route dialog 64
- Creating a destination code 65
- Figure 32 Normal schedule 66
- Configuring digits 67
- Activating the VoIP schedule 67
- Turning on QoS monitor 68
- Incoming call configuration 70
- Example configuration 71
- Making calls 74
- Connecting an i200X telephone 75
- Quality of Service Monitor 77
- Port settings 77
- Using firewalls 78
- Using a gatekeeper 80
- Gatekeeper call scenarios 82
- Typical applications 85
- MCDN functionality 86
- Networking 91
- Network Engineering 92
- Networking 93 93
- (64 kb/s) 93
- (5.3 kb/s) 93
- LAN Engineering Examples 95
- WAN engineering 96
- Setting Non-linear processing 96
- Networking 97 97
- Traceroute 97
- Enough link capacity 98
- Not enough link capacity 98
- Implementing the network 99
- Further network analysis 99
- Reduce link delay 100
- Reducing hop count 100
- Adjust the jitter buffer size 101
- Reduce packet errors 101
- Routing issues 102
- Silence compression 103
- Appendix B 103
- 104 Silence compression 104
- P0937663 02.0 104
- Silence compression 105 105
- 106 Silence compression 106
- Silence compression 107 107
- Comfort Noise 108
- Appendix C 109
- Network Performance Utilities 109
- Appendix D 111
- Interoperability 111
- Speech Path Setup Methods 112
- Media Path Redirection 112
- Gatekeeper 113
- Symbol Telephones 114
- Appendix E 115
- Quality of Service 115
- Measuring Intranet QoS 116
- Recording routes 117
- Adjustment for processing 118
- Late packets 118
- Quality of Service 119 119
- Traffic mix 120
- Network Quality of Service 121
- Packet loss 122
- Packet delay 122
- Delay variation (jitter) 123
- 124 Quality of Service 124
- Glossary 125
- 126 Glossary 126
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