Agilent-technologies N2620A Bedienungsanleitung Seite 125
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Voice Testing with the FrameScope Pro 3
N2620A User’s Guide 107
Core Services
Audio input and output
The Megaco/H.248 Voice Test captures the environment sound
or speech as well as the playback network audio data received.
The supported audio format is 8 kHz-16 bits-Mono.
Call setup and call control
The Megaco/H.248 IP Phone MG implementation supports two
operating modes.
• Active mode - acts as an IP phone MG and initiates calls to
other phone via the MGC on demand
• Passive mode - acts as an IP phone MG and answers incoming
calls from other MGC
Data transmission and receiving
The Megaco/H.248 uses the RTP stack (RFC 1889 or RFC 3550)
to transmit and receive audio (speech) data over UDP only.
Voice quality measurement
During the VoIP transactions, RTCP (RFC 1889 or RFC 3550) is
used to exchange QoS information among the senders and
receivers. Some of the information, such as the total packet
sent, inter-arrival jitter, packet loss ratio, and network
round-trip delay, will be displayed as the reference of the voice
quality.
R-Factor or MOS calculation
During the VoIP transactions, the R-Factor (Network-based) and
MOS (CQE) values are periodically calculated based on the
RTP/RTCP and audio codec information collected (such as the
packet loss ratio, inter-arrival jitter, round trip delay, and used
audio codec). The result is displayed to indicate voice quality.
- Agilent N2620A 1
- FrameScope Pro 1
- Network Performance 1
- Analyzer 1
- Safety Symbols 3
- General Safety Information 4
- Environmental Conditions 5
- Regulatory Markings 6
- N2620A User’s Guide VII 7
- VIII N2620A User’s Guide 8
- In This Guide… 9
- X N2620A User’s Guide 10
- Contents 11
- XII N2620A User’s Guide 12
- N2620A User’s Guide XIII 13
- XIV N2620A User’s Guide 14
- 7 System Operations 15
- XVI N2620A User’s Guide 16
- 9 Specifications 17
- 10 Glossary 17
- XVIII N2620A User’s Guide 18
- Introduction 20
- Laser Class 1 Label 21
- Front Panel 22
- Side Panels 23
- Standard Purchase Items 25
- Inspection and Maintenance 26
- Battery requirements 27
- Battery disposal 27
- The Main Menu at a Glance 28
- Getting Started 30
- Running a Test 33
- Saving a Test 33
- About Help 33
- Software Upgrade 34
- Localization 34
- Technical Support 35
- 18 N2620A User’s Guide 36
- 20 N2620A User’s Guide 38
- Network Testing Overview 39
- Examining the Network 40
- Detailed List 41
- Running an Autotest 42
- Using the Stations List 45
- 28 N2620A User’s Guide 46
- N2620A User’s Guide 29 47
- Performing a Ping Test 48
- N2620A User’s Guide 31 49
- N2620A User’s Guide 33 51
- Performing SNMP Queries 52
- N2620A User’s Guide 35 53
- 36 N2620A User’s Guide 54
- Setting Up an HTTP server 55
- Setting Up an FTP server 58
- Viewing Statistics 59
- Generating Network Traffic 62
- 46 N2620A User’s Guide 64
- N2620A User’s Guide 47 65
- N2620A User’s Guide 49 67
- Performing RFC 2544 Tests 68
- RFC 2544 Frame Loss Rate Test 69
- RFC 2544 Back-to-Back Test 69
- 52 N2620A User’s Guide 70
- 62 N2620A User’s Guide 80
- RFC 2544 Test Results 82
- 68 N2620A User’s Guide 86
- N2620A User’s Guide 71 89
- N2620A User’s Guide 73 91
- 74 N2620A User’s Guide 92
- N2620A User’s Guide 75 93
- Viewing the Error Log 96
- WireMap Testing 98
- WireMap Adapter Operation 99
- Procedure for WireMap Testing 99
- 82 N2620A User’s Guide 100
- Using the Test Database 101
- 84 N2620A User’s Guide 102
- Using the Network Database 103
- The valu es 105
- Locating Switch Ports 107
- 90 N2620A User’s Guide 108
- Agilent Technologies 109
- Voice Testing Overview 110
- Test Port Settings 111
- Audio Codec Support 111
- FrameScope Pro as the Caller 112
- FrameScope Pro as the Callee 112
- SIP Voice Testing 113
- Running the Test 116
- N2620A User’s Guide 99 117
- Interpreting Results 118
- N2620A User’s Guide 101 119
- 102 N2620A User’s Guide 120
- N2620A User’s Guide 103 121
- N2620A User’s Guide 105 123
- 6 Press OK 123
- Megaco/H.248 Voice Testing 124
- Core Services 125
- Megaco/H.248 test 128
- • Select for callee mode 129
- • Clear for caller mode 129
- • Select for live audio 129
- 114 N2620A User’s Guide 132
- N2620A User’s Guide 115 133
- 116 N2620A User’s Guide 134
- VoIP Traffic Overview 136
- RTP Header 137
- Measuring VoIP Parameters 137
- Generating Voice Traffic 138
- N2620A User’s Guide 121 139
- 122 N2620A User’s Guide 140
- DSL Testing Overview 142
- Connecting the Test Setup 143
- Connecting inside the gateway 144
- N2620A User’s Guide 127 145
- Getting xDSL Performance Data 146
- N2620A User’s Guide 129 147
- 130 N2620A User’s Guide 148
- Getting Further Information 149
- 132 N2620A User’s Guide 150
- Configuring the DSL Test 151
- 134 N2620A User’s Guide 152
- Advanced Settings for VIT-A2 153
- 136 N2620A User’s Guide 154
- N2620A User’s Guide 137 155
- 138 N2620A User’s Guide 156
- IPTV Testing Overview 158
- Supported Protocols 159
- Test R ep or ti ng 160
- Configurable Parameters 160
- Measurement Overview 161
- Stream Receiving 162
- Stream Quality Measurement 162
- Test Mod es 162
- Terminate mode 163
- Running an IP Video Test 164
- N2620A User’s Guide 147 165
- Downloading Video Channels 168
- N2620A User’s Guide 151 169
- Options screen 171
- 154 N2620A User’s Guide 172
- Detailed Test Result Screen 174
- Saving and Retrieving Results 176
- System Operations 177
- The Status Display Area 178
- The System Menu 179
- System Information 180
- License Details 181
- Storage Setup 183
- Battery Status 184
- Time and Date Setup 185
- User Interface Setup 186
- Touchscreen Calibration 187
- Restore Default Settings 188
- System Operations 7 191
- N2620A User’s Guide 173 191
- N2620A User’s Guide 175 193
- N2620A User’s Guide 177 195
- N2620A User’s Guide 179 197
- N2620A User’s Guide 181 199
- N2620A User’s Guide 183 201
- Boot Password 203
- Remote Control 207
- Starting remote control 209
- RFC 2544 Test 211
- Demo Mode 212
- SNMP Settings 213
- Network Performance Analyzer 215
- Reference 215
- 198 N2620A User’s Guide 216
- Network Connection 217
- Network Database 218
- Device Details 219
- Active Discovery Process 219
- Network Performance Autotest 221
- The Default Autotest Suite 222
- Editing Tests 222
- Deleting Tests 222
- Adding Tests 223
- 206 N2620A User’s Guide 224
- Web Server 225
- 208 N2620A User’s Guide 226
- Test setup 227
- 210 N2620A User’s Guide 228
- N2620A User’s Guide 211 229
- 212 N2620A User’s Guide 230
- FTP Server 231
- N2620A User’s Guide 215 233
- 216 N2620A User’s Guide 234
- Novell Server 235
- E-mail Server 236
- N2620A User’s Guide 219 237
- Print Server 238
- DNS Server 239
- DHCP Server 241
- 224 N2620A User’s Guide 242
- Primary Domain Controller 243
- Backup Domain Controller 244
- SNMP Agent 246
- Workstation 247
- TCP Test 248
- Running Autotest 249
- Changing the Autotest Metrics 250
- Autotest Results 251
- Statistics 252
- Top Transmitters 253
- Error Mix 253
- Protocol Mix 254
- Network Tools 255
- SNMP Query 256
- Locate Switch Port 256
- Performance Tests 256
- Traffic Generation 257
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- 242 N2620A User’s Guide 260
- N2620A User’s Guide 243 261
- 244 N2620A User’s Guide 262
- Memory Requirements 263
- 246 N2620A User’s Guide 264
- Specifications 265
- Physical 266
- Environmental 266
- Electrical 267
- Glossary 269
- Glossary 10 271
- N2620A User’s Guide 253 271
- N2620A User’s Guide 255 273
- N2620A User’s Guide 257 275
- N2620A User’s Guide 259 277
- 260 N2620A User’s Guide 278
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