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Bandwidth Management Page 53 of 258
Main Office Configuration for Survivable Remote Gateway 50 Configuration Guide
zones involved (that is, Best Bandwidth or Best Quality). Likewise, the
bandwidth calculations use the preferred codec of the Voice Gateway Media
Card for connections between a circuit-switched device (for example, a PRI
trunk) and a Virtual Trunk.
Codec selection
For every Virtual Trunk call, a codec must be selected before the media path
can be opened. When a call is set up or modified (that is, media redirection),
one of two processes occurs:
• The terminating node selects a common codec and sends the selected
codec to the originating node.
• The codec selection occurs on both nodes.
Each node has two codec lists: its own list and the far end’s list. In order to
select the same codec on both nodes, it is essential to use the same codec
selection algorithm on both nodes. Before the codec selection occurs, the
following conditions are met:
• Each codec list contains more than one payload size for a given codec
type (it depends on the codec configuration). Payload size must be set to
30 msec for proper functionality between the CS1000 and the SRG.
• Each codec list is sorted by order of preference (the first codec in the near
end’s list is the near end’s most preferred codec, the first codec in the far
end’s list is the far end’s preferred codec).
Codec selection algorithms
When the codec lists meet the above conditions, one of the following codec
selection algorithms selects the codec to be used:
• H.323 Master/Slave algorithm
• “Best Bandwidth” codec selection algorithm
- Remote Gateway 50 1
- Revision history 3
- Page 6 of 258 Contents 6
- Contents Page 7 of 258 7
- Page 8 of 258 Contents 8
- List of procedures 9
- About this document 11
- Applicable systems 12
- Intended audience 12
- Conventions 12
- Related information 13
- Overview 15
- Page 16 of 258 Overview 16
- Overview Page 17 of 258 17
- Figure 1: 17
- SRG network 17
- Signaling Server 18
- Network Routing Service 18
- Telephones 19
- Main office requirements 20
- Overview Page 21 of 258 21
- Normal Mode 22
- Local Mode 22
- Survivability 22
- Overview Page 23 of 258 23
- Recovery to Normal Mode 24
- Local Mode operation 24
- Virtual Trunks 25
- Bandwidth Management Overview 26
- Miscellaneous items 27
- Page 28 of 258 Overview 28
- Capacity 29
- Branch office dialing plan 30
- ESN Access Codes 31
- Music on Hold 31
- Page 34 of 258 Overview 34
- Setting up the main office 35
- Telephony programming: 38
- Zone parameters 39
- IMPORTANT! 40
- Identifier (Part 1 of 2) 40
- Identifier (Part 2 of 2) 41
- CS 1000 Element Manager 43
- Figure 3 45
- Figure 4 46
- Introduction 50
- Codec negotiation 50
- Codec selection 53
- Codec selection algorithms 53
- Configuration rules 57
- Network Planning 57
- Enabling codecs 58
- Figure 5 59
- Configuring a codec 59
- Configuration using LD 117 61
- CHG ZONE command 61
- Maintenance commands 63
- Maintenance using LD 117 66
- Figure 10 70
- Figure 11 71
- Figure 12 73
- Figure 13 74
- Figure 14 78
- Figure 15 87
- End of Procedure 87
- (Part 1 of 3) 88
- (Part 2 of 3) 89
- Figure 17 92
- Application 93
- Dialing Plan Overview 94
- Figure 19 95
- General legend 95
- Common details 96
- Figure 21 99
- Figure 22 100
- Figure 23 101
- Figure 24 103
- Figure 25 104
- Figure 26 105
- Figure 27 106
- Figure 28 107
- Figure 29 108
- Dialing Plan 116
- Manager 117
- Figure 33 118
- Figure 34 119
- Figure 35 120
- Figure 36 121
- Figure 38 124
- Figure 39 125
- Figure 40 126
- Bandwidth Management 127
- Figure 41 128
- ALTPrefix 130
- Dialing plans 132
- Figure 42 134
- Figure 43 136
- Figure 44 138
- Figure 45 140
- Figure 46 142
- Figure 47 144
- Operating parameters 146
- Feature interactions 148
- Feature packaging 149
- Sample printout 151
- Zone configuration 151
- Accessing the Zones web page 152
- Diagnostics 155
- Element Manager diagnostics 156
- Maintenance 162
- Element Manager maintenance 163
- Suppress alarms 165
- Feature operation 166
- Dialing Plan configuration 167
- On-net dialing plan 168
- Off-net dialing plan 169
- Routing calls 170
- H.323 zones 170
- Zone-based digit manipulation 171
- Calling Line ID composition 172
- Configuring the dialing plan 174
- Dialing plan examples 193
- Figure 62 195
- Figure 63 196
- Figure 64 197
- Figure 65 199
- Figure 66 201
- Figure 67 202
- Figure 68 203
- Figure 69 206
- Normal and Local Mode 206
- Figure 70 207
- Figure 71 209
- Figure 72 212
- Figure 73 214
- Universal Dialing Plan 216
- Figure 74 217
- UDP using location codes 217
- Figure 75 218
- Figure 77 221
- Contents 225
- Testing the ESDN number 238
- Description 241
- Firmware upgrade 242
- Scenarios 245
- List of terms 251
- Survivable Remote Gateway 50 260
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