IES-1248-51 User’s Guide
Chapter 18 xDSL Line Data
145
Discrete Multi-Tone (DMT) modulation divides up a line’s bandwidth into tones. This screen
displays the number of bits transmitted for each tone. This can be used to determine the quality
of the connection, whether a given sub-carrier loop has sufficient margins to support ADSL
transmission rates, and possibly to determine whether certain specific types of interference or
line attenuation exist. See the ITU-T G.992.1 recommendation for more information on DMT.
The better (or shorter) the line, the higher the number of bits transmitted for a DMT tone. The
maximum number of bits that can be transmitted per DMT tone is 15.
The bit allocation contents are only valid when the link is up.
To open this screen, click
Basic Setting
,
xDSL Line Data
,
Line Data
.
In the screen shown, the downstream channel is carried on tones 48 to 255 and the upstream
channel is carried on tones 16 to 31 (space is left between the channels to avoid interference).
Figure 70
xDSL Line Data
Содержание IES-1248-51
Страница 1: ...IES 1248 51 ADSL2 IP DSLAM User s Guide Version 3 51 ABQ 1 3 2006 ...
Страница 4: ...IES 1248 51 User s Guide 4 Interference Statements and Warnings ...
Страница 22: ...IES 1248 51 User s Guide 22 Table of Contents Index 379 ...
Страница 30: ...IES 1248 51 User s Guide 30 List of Figures ...
Страница 34: ...IES 1248 51 User s Guide 34 List of Tables ...
Страница 47: ...IES 1248 51 User s Guide Chapter 2 Hardware Installation 47 Figure 6 IES 1248 51 Frame Ground Frame Ground ...
Страница 48: ...IES 1248 51 User s Guide 48 Chapter 2 Hardware Installation ...
Страница 62: ...IES 1248 51 User s Guide 62 Chapter 4 MDF Connections ...
Страница 73: ...IES 1248 51 User s Guide Chapter 7 Introducing the Web Configurator 73 Figure 29 Logout ...
Страница 74: ...IES 1248 51 User s Guide 74 Chapter 7 Introducing the Web Configurator ...
Страница 88: ...IES 1248 51 User s Guide 88 Chapter 9 Home and Port Statistics Screens ...
Страница 90: ...IES 1248 51 User s Guide 90 Chapter 10 System Information Figure 44 System Info ...
Страница 98: ...IES 1248 51 User s Guide 98 Chapter 12 User Account ...
Страница 104: ...IES 1248 51 User s Guide 104 Chapter 13 Switch Setup ...
Страница 106: ...IES 1248 51 User s Guide 106 Chapter 14 IP Setup ...
Страница 126: ...IES 1248 51 User s Guide 126 Chapter 16 xDSL Port Setup ...
Страница 140: ...IES 1248 51 User s Guide 140 Chapter 17 xDSL Profiles Setup ...
Страница 154: ...IES 1248 51 User s Guide 154 Chapter 19 VLAN ...
Страница 188: ...IES 1248 51 User s Guide 188 Chapter 28 2684 Routed Mode ...
Страница 192: ...IES 1248 51 User s Guide 192 Chapter 30 Syslog ...
Страница 210: ...IES 1248 51 User s Guide 210 Chapter 33 Alarm ...
Страница 240: ...IES 1248 51 User s Guide 240 Chapter 38 Commands ...
Страница 256: ...IES 1248 51 User s Guide 256 Chapter 40 Alarm Commands ...
Страница 262: ...IES 1248 51 User s Guide 262 Chapter 41 DHCP Relay Commands ...
Страница 282: ...IES 1248 51 User s Guide 282 Chapter 44 IGMP Commands ...
Страница 286: ...IES 1248 51 User s Guide 286 Chapter 45 Packet Filter Commands ...
Страница 292: ...IES 1248 51 User s Guide 292 Chapter 46 IP Commands ...
Страница 302: ...IES 1248 51 User s Guide 302 Chapter 48 SNMP ...
Страница 338: ...IES 1248 51 User s Guide 338 Chapter 49 ADSL Commands ...
Страница 358: ...IES 1248 51 User s Guide 358 Chapter 50 Virtual Channel Management ...
Страница 370: ...IES 1248 51 User s Guide 370 Chapter 51 Troubleshooting ...
Страница 378: ...IES 1248 51 User s Guide 378 ...