Evaluating Symptoms and Solutions

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Table 6 Symptoms, Causes, and Solutions

Symptom

Possible Cause

Solution

Sending e-mail is occasionally slow when more than one workstation is sending e-mail to the same SMTP server.

Compression does not work

A limitation of NAT, the SMTP server uses a different port number than the one requested by the workstations sending e-mail so the LAN Modem does not know which of the 2 (or more) workstations to forward the response to. Therefore, the request is discarded.

After 30 seconds, the SMTP server responds, this time using the port number specified by the workstation allowing the e-mail to be sent.

Compression is not configured.

Co-ordinate the sending of your e-mail with the other workstations, or have each workstation use a different SMTP mail server.

Go to the appropriate Service Provides page and ensure compression is enabled.

Compression negotiation was not

Although compression is enabled on the LAN Modem,

successful.

the device the LAN Modem is dialing into must also

 

have compression enabled and also support the same

 

type of compression (hi/fn LZS) otherwise compression

 

negotiation will not be successful.

 

 

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3Com 3C892 manual Negotiation will not be successful