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Chapter 18 Diagnostic
P-660R-F1 Series User’s Guide
211
18.2
DSL Line Diagnostic
Click
Maintenance > Diagnostic
>
DSL Line
to open the screen shown next.
Figure 136
Diagnostic: DSL Line
The following table describes the fields in this screen.
Table 93
Diagnostic: DSL Line
LABEL
DESCRIPTION
ATM Status
Click this button to view ATM status.
ATM Loopback
Test
Click this button 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 ZyXEL Device
sends an OAM F5 packet to the DSLAM/ATM switch and then returns it (loops it
back) to the ZyXEL Device. The ATM loopback test is useful for troubleshooting
problems with the DSLAM and ATM network.
DSL Line Status
Click this button to view the DSL port’s line operating values and line bit allocation.
Reset ADSL Line
Click this button 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 button to display all logs generated with the DSL line.
Page 212 / 268
Chapter 18 Diagnostic
P-660R-F1 Series User’s Guide
212
Page 213 / 268
P-660R-F1 Series User’s Guide
213
C
HAPTER
19
Troubleshooting
This chapter covers potential problems and the corresponding remedies.
19.1
Problems Starting Up the ZyXEL Device
19.2
Problems with the LAN
Table 94
Troubleshooting Starting Up Your ZyXEL Device
PROBLEM
CORRECTIVE ACTION
None of the
lights turn on
when I turn on
the ZyXEL
Device.
Make sure that the ZyXEL Device’s power adaptor is connected to the ZyXEL Device
and plugged in to an appropriate power source. Make sure that the ZyXEL Device
and the power source are both turned on.
Turn the ZyXEL Device off and on.
If the error persists, you may have a hardware problem. In this case, you should
contact your vendor.
Table 95
Troubleshooting the LAN
PROBLEM
CORRECTIVE ACTION
The LAN lights do
not turn on.
Check your Ethernet cable connections (refer to the Quick Start Guide for details).
Check for faulty Ethernet cables.
Make sure your computer’s Ethernet Card is working properly.
I cannot access
the ZyXEL Device
from the LAN.
If
Any IP
is disabled, make sure that the IP address and the subnet mask of the
ZyXEL Device and your computer(s) are on the same subnet.
Page 214 / 268
Chapter 19 Troubleshooting
P-660R-F1 Series User’s Guide
214
19.3
Problems with the WAN
Table 96
Troubleshooting the WAN
PROBLEM
CORRECTIVE ACTION
The DSL light is
off.
Check the telephone wire and connections between the ZyXEL Device DSL port
and the wall jack.
Make sure that the telephone company has checked your phone line and set it up
for DSL service.
Reset your ADSL line to reinitialize your link to the DSLAM. For details, refer to
Table 93 on page 211
.
I cannot get a
WAN IP address
from the ISP.
The ISP provides the WAN IP address after authenticating you. Authentication
may be through the user name and password, the MAC address or the host
name.
The username and password apply to PPPoE and PPPoA encapsulation only. Make
sure that you have entered the correct
Service Type
,
User Name
and
Password
(be sure to use the correct casing). Refer to the WAN Setup
chapter.
I cannot access
the Internet.
Make sure the ZyXEL Device is turned on and connected to the network.
Verify your WAN settings. Refer to the chapter on WAN setup.
Make sure you entered the correct user name and password.
If you use PPPoE pass through, make sure that bridge mode is turned on.
The Internet
connection
disconnects.
Check the schedule rules.
If you use PPPoA or PPPoE encapsulation, check the idle time-out setting. Refer
to
Chapter 4 on page 43
.
Contact your ISP.
Page 215 / 268
Chapter 19 Troubleshooting
P-660R-F1 Series User’s Guide
215
19.4
Problems Accessing the ZyXEL Device
Table 97
Troubleshooting Accessing the ZyXEL Device
PROBLEM
CORRECTIVE ACTION
I cannot
access the
ZyXEL Device.
The default user password is “user” and admin password is “1234”. The
Password
field is case-sensitive. Make sure that you enter the correct password using the
proper case.
If you have changed the password and have now forgotten it, you will need to upload
the default configuration file. This restores all of the factory defaults including the
password.
I cannot
access the
web
configurator.
Make sure that there is not a Telnet session running.
Use the ZyXEL Device’s WAN IP address when configuring from the WAN. Refer to the
instructions on checking your WAN connection.
Use the ZyXEL Device’s LAN IP address when configuring from the LAN. Refer to for
instructions on checking your LAN connection.
Check that you have enabled web service access. If you have configured a secured
client IP address, your computer’s IP address must match it. Refer to the chapter on
remote management for details.
Your computer’s and the ZyXEL Device’s IP addresses must be on the same subnet
for LAN access.
If you changed the ZyXEL Device’s LAN IP address, then enter the new one as the
URL.
Make sure that pop-up windows, JavaScripts and Java permissions are allowed. See
the appendix for how to enable them.

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