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Chapter 6 Broadband
AMG1302/AMG1202-TSeries User’s Guide
89
Sustained Cell Rate (SCR) is the mean cell rate of each bursty traffic source. It specifies the
maximum average rate at which cells can be sent over the virtual connection. SCR may not be
greater than the PCR.
Maximum Burst Size (MBS) is the maximum number of cells that can be sent at the PCR. After MBS
is reached, cell rates fall below SCR until cell rate averages to the SCR again. At this time, more
cells (up to the MBS) can be sent at the PCR again.
If the PCR, SCR or MBS is set to the default of "0", the system will assign a maximum value that
correlates to your upstream line rate.
The following figure illustrates the relationship between PCR, SCR and MBS.
Figure 25
Example of Traffic Shaping
6.5.1 ATM Traffic Classes
These are the basic ATM traffic classes defined by the ATM Forum Traffic Management 4.0
Specification.
Constant Bit Rate (CBR)
Constant Bit Rate (CBR) provides fixed bandwidth that is always available even if no data is being
sent. CBR traffic is generally time-sensitive (doesn't tolerate delay). CBR is used for connections
that continuously require a specific amount of bandwidth. A PCR is specified and if traffic exceeds
this rate, cells may be dropped. Examples of connections that need CBR would be high-resolution
video and voice.
Variable Bit Rate (VBR)
The Variable Bit Rate (VBR) ATM traffic class is used with bursty connections. Connections that use
the Variable Bit Rate (VBR) traffic class can be grouped into real time (VBR-RT) or non-real time
(VBR-nRT) connections.
The VBR-RT (real-time Variable Bit Rate) type is used with bursty connections that require closely
controlled delay and delay variation. It also provides a fixed amount of bandwidth (a PCR is
specified) but is only available when data is being sent. An example of an VBR-RT connection would
be video conferencing. Video conferencing requires real-time data transfers and the bandwidth
requirement varies in proportion to the video image's changing dynamics.
Содержание AMG1202-T series
Страница 4: ...Contents Overview AMG1302 AMG1202 TSeries User s Guide 4 ...
Страница 13: ...13 PART I User s Guide ...
Страница 14: ...14 ...
Страница 20: ...Chapter 1 Introduction AMG1302 AMG1202 TSeries User s Guide 20 ...
Страница 28: ...Chapter 2 Introducing the Web Configurator AMG1302 AMG1202 TSeries User s Guide 28 ...
Страница 61: ...Chapter 4 Tutorials AMG1302 AMG1202 TSeries User s Guide 61 Tutorial Advanced QoS Class Setup ...
Страница 64: ...Chapter 4 Tutorials AMG1302 AMG1202 TSeries User s Guide 64 ...
Страница 65: ...65 PART II Technical Reference ...
Страница 66: ...66 ...
Страница 72: ...Chapter 5 Connection Status and System Info Screens AMG1302 AMG1202 TSeries User s Guide 72 ...
Страница 120: ...Chapter 7 Wireless LAN AMG1302 AMG1202 TSeries User s Guide 120 ...
Страница 144: ...Chapter 10 Quality of Service QoS AMG1302 AMG1202 TSeries User s Guide 144 Figure 64 QoS Class Setup Add Edit ...
Страница 150: ...Chapter 10 Quality of Service QoS AMG1302 AMG1202 TSeries User s Guide 150 ...
Страница 160: ...Chapter 11 Network Address Translation NAT AMG1302 AMG1202 TSeries User s Guide 160 ...
Страница 172: ...Chapter 14 Filters AMG1302 AMG1202 TSeries User s Guide 172 ...
Страница 194: ...Chapter 16 Parental Control AMG1302 AMG1202 TSeries User s Guide 194 ...
Страница 200: ...Chapter 17 Certificate AMG1302 AMG1202 TSeries User s Guide 200 ...
Страница 206: ...Chapter 19 Traffic Status AMG1302 AMG1202 TSeries User s Guide 206 ...
Страница 208: ...Chapter 20 User Account AMG1302 AMG1202 TSeries User s Guide 208 ...
Страница 212: ...Chapter 21 TR 069 Client AMG1302 AMG1202 TSeries User s Guide 212 ...
Страница 216: ...Chapter 22 System Settings AMG1302 AMG1202 TSeries User s Guide 216 ...
Страница 222: ...Chapter 24 Backup Restore AMG1302 AMG1202 TSeries User s Guide 222 ...
Страница 234: ...Chapter 25 Remote Management AMG1302 AMG1202 TSeries User s Guide 234 ...
Страница 238: ...Chapter 26 Diagnostic AMG1302 AMG1202 TSeries User s Guide 238 ...
Страница 244: ...Chapter 27 Troubleshooting AMG1302 AMG1202 TSeries User s Guide 244 ...
Страница 280: ...Appendix C Pop up Windows JavaScripts and Java Permissions AMG1302 AMG1202 TSeries User s Guide 280 ...
Страница 294: ...Appendix D Wireless LANs AMG1302 AMG1202 TSeries User s Guide 294 ...
Страница 304: ...Appendix E IPv6 AMG1302 AMG1202 TSeries User s Guide 304 ...
Страница 320: ...Index AMG1302 AMG1202 TSeries User s Guide 320 ...