Avaya BCM 2.5 IP Telephony Konfigurationsanleitung Seite 113
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Interoperability 113
IP Telephony Configuration Guide
Gatekeeper
The Business Communications Manager is designed to interoperate with any H.323v2 gatekeeper,
with the Business Communications Manager supporting both Direct (GatekeeperResolved) and
Routed (GatekeeperRouted) call signalling in this mode of operation. Note that if the call
signalling method is changed, the Business Communications Manager must be restarted before it
functions properly.
Asymmetrical Media Channel Negotiation
By default, the Business Communications Manager IP Telephony gateway supports the G.729
codec family, G.723.1, G.711
µ
-law and G.711 A-law audio media encoding. Because NetMeeting
does not support the H.323 fastStart call setup method, NetMeeting can choose a different media
type for its receive and transmit channels. However, Business Communications Manager IP
Telephony gateway does not support calls with different media types for the receive and transmit
channels and immediately hangs up a call taken with asymmetric audio channels. In this case, the
party on the Business Communications Manager switch hears a treatment from the switch
(normally a reorder tone). The party on the NetMeeting client losses connection.
To solve this problem, in NetMeeting, under the Tools, Options, Audio, Advanced, check
Manually configure compression settings, and ensure that the media types are in the same order
as shown in the Business Communications Manager media parameters table. Table 17 on page 113
lists the names used by the Business Communications Manager local gateway table and the
matching names in NetMeeting.
No feedback busy station
The Business Communications Manager VoIP gateway provides call progress tones in-band to the
user. If a a busy station is contacted through the gateway, the gateway plays a busy tone to the user.
However, as NetMeeting does not support fastStart, no speech path is opened to the user before the
call connects. Because of this, the user on the NetMeeting station does not hear a busy signal from
the gateway.
Table 17 Name comparison
Business Communications Manager media
parameters table MS NetMeeting
G.723.1 6.3 Kbit/s MS G.723 6400 bit/s
G.723.1 5.3 Kbit/s MS G.723 5333 bit/s
G.711
µ
-law CCITT
µ
-law
G.711 A-law CCITT A-law
- 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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