3com 3C886 Manuel D’Utilisation

C

HAPTER

 8: T

ROUBLESHOOTING

 

AND

 M

AINTENANCE

Sending SMTP mail is slow.

Only one workstation to one 
server is supported at one time 
for SMTP mail.

If more than one workstation starts an SMTP mail 
session to the same remote server at the same time, 
the mail transfer rate for each additional workstation 
will be slowed.

Although multiple service 
providers are configured, all 
calls are going to the same 
service provider which is a 
private network

You may not have configured the 
IP address and the subnet mask 
in the Private Network 
Parameters window.

From the 56K LAN Modem’s home page, click  Service 
Providers  and then select the private network profile 
you already configured. Enter the IP address and the 
subnet mask for the private network.

The Windows 95 “Connect 
To” window opens upon 
launching a Web browser.

Dial-Up Networking is setup for 
use with a serial port modem.

To bypass the “Connect To” window: 

1 Double-click the  Internet  control panel.

2 Click the  Connection  tab.

3 Check the “Connect to the Internet using a local 

area network” radio button.

4 Click OK.

This allows all outgoing connections to run directly 
through your LAN Modem.

ALERT LED remains lit

An internal failure.

Notify your reseller or technical support that the 56K 
LAN Modem has failed the self-test.

ALERT LED continues to flash

Self test failure or LAN Modem is 
in firmware download mode

Power cycle the LAN Modem. If the ALERT LED 
continues to flash, the ISDN LAN Modem has failed the 
self test. Contact your network supplier. If the ALERT 
LED is not flashing, then the LAN Modem is now 
operating correctly.

ALERT LED continues to fast 
flash.

This may occur as a result of 
replacing a workstation on the 
LAN with a new computer.

The DHCP server has issued all 
of the available IP addresses, and 
is unable to fulfill a request for a 
new IP address.

From another computer attached to the LAN Modem, 
go to the LAN Modem’s main configuration page. 
Click Workstations . Select the name of computer you 
removed and then click  Select . Click Release 
Workstation Entry . Reboot the workstation. The newly- 
added workstation can now be assigned an IP address.

When the handset of a 
telephone attached to the 56K 
LAN Modem is lifted, a dial 
tone cannot be heard.

The telephone line cable, power 
cable and/or phone cable may 
not be firmly connected.

Check all cables and connectors to ensure that they are 
inserted securely.

Telephone cable may not be 
inserted into the correct port.

Ensure that the incoming analog telephone line has 
been connected the port labeled “LINE” on the LAN 
Modem’s back panel.

A data call may be in progress.

Disconnect any data calls currently in progress.

CD LED does not remain green.

The user name and/or password 
for this service provider may not 
be entered properly.

Make sure that the user name and password for this 
service provider are entered accurately on the Service 
Provider page.

A connection has been 
established (CD LED remains lit) 
but data cannot be sent.

There is an interoperability 
mismatch between the local and 
remote applications.

Make sure that the local and remote data applications 
have communications capability and are properly 
configured.

(continued)

Table 8   Symptoms, Causes, and Solutions