Sony PCV-W30 VAIO User Guide (primary manual) Manual page 52

About the Modem
Why is my modem connection slow?
Many factors can influence modem connection speed, such as:

Telephone line noise.

Incompatibility with other telephone equipment such as fax machines or other modems.

Internet Service Providers (ISP) connection capability may vary.
If you think your modem is not connecting properly to other PC-based modems, fax machines, or your ISP, check the
following:
 Contact your telephone company and ask them to verify that your telephone line is free from line noise.

If your problem is fax-related, check that there are no problems with the fax machine you are calling and that it is
compatible with fax modems.
 For optimum performance, verify that your ISP point of presence (POP) telephone number is compliant with V.90
standards.
 If you are having a problem connecting with your ISP, check that they are not experiencing technical problems.
 Try connecting your modem through another telephone line, if available.
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