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Chapter 21 Diagnostic
AMG1202-T10A User’s Guide
212
DSL Line Status
Click this to view statistics about the DSL connections.
noise margin downstream
is the signal to noise ratio for the downstream part
of the connection (coming into the ZyXEL Device from the ISP). It is measured in
decibels. The higher the number the more signal and less noise there is.
output power upstream
is the amount of power (in decibels) that the ZyXEL
Device is using to transmit to the ISP.
attenuation downstream
is the reduction in amplitude (in decibels) of the DSL
signal coming into the ZyXEL Device from the ISP.
Discrete Multi-Tone (DMT) modulation divides up a line’s bandwidth into sub-
carriers (sub-channels) of 4.3125 KHz each called tones. The rest of the display is
the line’s bit allocation. This is displayed as the number (in hexadecimal format) 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
certain ADSL transmission rates, and possibly to determine whether particular
specific types of interference or line attenuation exist. Refer to 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. There will be some tones without any bits as there has to be space between
the upstream and downstream channels.
Reset ADSL Line Click this to reinitialize the ADSL line. The large text box above then displays the
progress and results of this operation, for example:
"Start to reset ADSL
Loading ADSL modem F/W...
Reset ADSL Line Successfully!"
Capture All Logs Click this to display information and statistics about your ZyXEL Device’s ATM
statistics, DSL connection statistics, DHCP settings, firmware version, WAN and
gateway IP address, VPI/VCI and LAN IP address.
Table 92
Maintenance > Diagnostic > DSL Line (continued)
LABEL
DESCRIPTION
Содержание AMG1202-T10A
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Страница 6: ...Document Conventions AMG1202 T10A User s Guide 6 Server Firewall Telephone Router Switch ...
Страница 8: ...Safety Warnings AMG1202 T10A User s Guide 8 ...
Страница 10: ...Contents Overview AMG1202 T10A User s Guide 10 ...
Страница 18: ...Table of Contents AMG1202 T10A User s Guide 18 ...
Страница 19: ...19 PART I User s Guide ...
Страница 20: ...20 ...
Страница 26: ...Chapter 1 Introduction AMG1202 T10A User s Guide 26 ...
Страница 32: ...Chapter 2 The Web Configurator AMG1202 T10A User s Guide 32 ...
Страница 36: ...Chapter 3 Status Screens AMG1202 T10A User s Guide 36 ...
Страница 53: ...53 PART II Technical Reference ...
Страница 54: ...54 ...
Страница 84: ...Chapter 6 WAN Setup AMG1202 T10A User s Guide 84 ...
Страница 96: ...Chapter 7 LAN Setup AMG1202 T10A User s Guide 96 ...
Страница 126: ...Chapter 8 Wireless LAN AMG1202 T10A User s Guide 126 ...
Страница 142: ...Chapter 10 Firewall AMG1202 T10A User s Guide 142 ...
Страница 148: ...Chapter 11 Filters AMG1202 T10A User s Guide 148 ...
Страница 152: ...Chapter 12 Static Route AMG1202 T10A User s Guide 152 ...
Страница 158: ...Chapter 13 802 1Q 1P AMG1202 T10A User s Guide 158 ...
Страница 166: ...Chapter 14 Quality of Service QoS AMG1202 T10A User s Guide 166 ...
Страница 202: ...Chapter 19 Logs AMG1202 T10A User s Guide 202 ...
Страница 223: ...Chapter 23 Product Specifications AMG1202 T10A User s Guide 223 ...
Страница 224: ...Chapter 23 Product Specifications AMG1202 T10A User s Guide 224 ...
Страница 264: ...Appendix C Pop up Windows JavaScripts and Java Permissions AMG1202 T10A User s Guide 264 ...
Страница 278: ...Appendix D Wireless LANs AMG1202 T10A User s Guide 278 ...
Страница 286: ...Appendix F Legal Information AMG1202 T10A User s Guide 286 ...
Страница 294: ...Index AMG1202 T10A User s Guide 294 ...
Страница 295: ...Index AMG1202 T10A User s Guide 295 ...
Страница 296: ...Index AMG1202 T10A User s Guide 296 ...