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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.

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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

Chapter 26 Diagnostic

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238

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

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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

.