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Page 236 / 320 Scroll up to view Page 231 - 235
Chapter 26 Diagnostic
AMG1302/AMG1202-TSeries User’s Guide
236
26.3
The DSL Line Screen
Use this screen to view the DSL line statistics and reset the ADSL line. Click
Maintenance >
Diagnostic
>
DSL Line
to open the screen shown next.
Figure 126
Maintenance > Diagnostic > DSL Line
The following table describes the fields in this screen.
Table 93
Maintenance > Diagnostic > DSL Line
LABEL
DESCRIPTION
ATM Status
Click this to view your DSL connection’s Asynchronous Transfer Mode (ATM) statistics.
ATM is a networking technology that provides high-speed data transfer. ATM uses fixed-
size packets of information called cells. With ATM, a high QoS (Quality of Service) can be
guaranteed.
The (Segmentation and Reassembly) SAR driver translates packets into ATM cells. It also
receives ATM cells and reassembles them into packets.
These counters are set back to zero whenever the device starts up.
inPkts
is the number of good ATM cells that have been received.
inDiscards
is the number of received ATM cells that were rejected.
inF4Pkts
is the number of ATM Operations, Administration, and Management (OAM) F4
cells that have been received. See ITU recommendation I.610 for more on OAM for ATM.
inF5Pkts
is the number of ATM OAM F5 cells that have been received.
outPkts
is the number of ATM cells that have been sent.
outDiscards
is the number of ATM cells sent that were rejected.
outF4Pkts
is the number of ATM OAM F4 cells that have been sent.
outF5Pkts
is the number of ATM OAM F5 cells that have been sent.
ATM Loopback
Test
Click this to start the ATM loopback test. Make sure you have configured at least one PVC
with proper VPIs/VCIs before you begin this test. The AMG1302/AMG1202-TSeries sends
an OAM F5 packet to the DSLAM/ATM switch and then returns it (loops it back) to the
AMG1302/AMG1202-TSeries. The ATM loopback test is useful for troubleshooting
problems with the DSLAM and ATM network.
Page 237 / 320
Chapter 26 Diagnostic
AMG1302/AMG1202-TSeries User’s Guide
237
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 AMG1302/AMG1202-TSeries 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 AMG1302/
AMG1202-TSeries is using to transmit to the ISP.
attenuation downstream
is the reduction in amplitude (in decibels) of the DSL signal
coming into the AMG1302/AMG1202-TSeries 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!"
Table 93
Maintenance > Diagnostic > DSL Line (continued)
LABEL
DESCRIPTION
Page 238 / 320
Chapter 26 Diagnostic
AMG1302/AMG1202-TSeries User’s Guide
238
Page 239 / 320
AMG1302/AMG1202-TSeries User’s Guide
239
C
HAPTER
27
Troubleshooting
This chapter offers some suggestions to solve problems you might encounter. The potential
problems are divided into the following categories.
•
Power, Hardware Connections, and LEDs
•
AMG1302/AMG1202-TSeries Access and Login
•
Internet Access
27.1
Power, Hardware Connections, and LEDs
The AMG1302/AMG1202-TSeries does not turn on. None of the LEDs turn on.
1
Make sure the AMG1302/AMG1202-TSeries is turned on.
2
Make sure you are using the power adaptor or cord included with the AMG1302/AMG1202-TSeries.
3
Make sure the power adaptor or cord is connected to the AMG1302/AMG1202-TSeries and plugged
in to an appropriate power source. Make sure the power source is turned on.
4
Turn the AMG1302/AMG1202-TSeries off and on.
5
If the problem continues, contact the vendor.
One of the LEDs does not behave as expected.
1
Make sure you understand the normal behavior of the LED.
Section 1.5 on page 17
2
Check the hardware connections.
3
Inspect your cables for damage. Contact the vendor to replace any damaged cables.
LABEL
DESCRIPTION
WPS LED
Green: successful connection
Off: connection failure
WIFI LED
Green: WIFI active
Off: WIFI inactive
Page 240 / 320
Chapter 27 Troubleshooting
AMG1302/AMG1202-TSeries User’s Guide
240
4
Turn the AMG1302/AMG1202-TSeries off and on.
5
If the problem continues, contact the vendor.
27.2
AMG1302/AMG1202-TSeries Access and Login
I forgot the IP address for the AMG1302/AMG1202-TSeries.
1
The default IP address is
192.168.1.1
.
2
If you changed the IP address and have forgotten it, you might get the IP address of the AMG1302/
AMG1202-TSeries by looking up the IP address of the default gateway for your computer. To do this
in most Windows computers, click
Start > Run
, enter
cmd
, and then enter
ipconfig
. The IP
address of the
Default Gateway
might be the IP address of the AMG1302/AMG1202-TSeries (it
depends on the network), so enter this IP address in your Internet browser.
3
If this does not work, you have to reset the device to its factory defaults. See
Section 1.7 on page
19
.
I forgot the password.
1
The default admin user name and password can be found on the cover of this User’s Guide.
2
If this does not work, you have to reset the device to its factory defaults. See
Section 1.7 on page
19
.
I cannot see or access the
Login
screen for the web configurator.
1
Make sure you are using the correct IP address.
•
The default IP address is
192.168.1.1
.
•
If you changed the IP address (
Section 8.2 on page 123
), use the new IP address.
•
If you changed the IP address and have forgotten it, see the troubleshooting suggestions for
I
forgot the IP address for the AMG1302/AMG1202-TSeries.
2
Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick
Start Guide.
3
Make sure your Internet browser does not block pop-up windows and has JavaScripts and Java
enabled. See
Appendix C on page 273
.

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