My Modem Connection Is Slow - Sony VGN-S4HP/B User Manual

Only DTMF (Dual Tone Multi Frequency) signalling (tone dialling) is supported.
The internal modem is intended to be used for data and fax communications using DTMF (Dual Tone Multi Frequency)
signalling (tone dialing) on the PSTN (Public Switched Telephone Network) networks in the following countries: Austria,
Belgium, Czech Republic, Denmark, Finland, France, Greece, Germany, Iceland, Ireland, Italy, Luxembourg, Norway,
Portugal, Spain, Sweden, Switzerland, the Netherlands and the United Kingdom.
If your computer is equipped with the flexible modem connector cover, do not pull it too forcefully.

My modem connection is slow

Many factors influence modem connection speed, including telephone line noise or compatibility with telephone equipment (such
as fax machines or other modems). If you think your modem is not connecting properly to other PC-based modems, fax machines,
or your Internet Service Provider, check the following:
Have your phone company check that your phone line is free from any 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.
If you are having a problem connecting with your Internet Service Provider, check that the ISP is not experiencing technical
problems.
If you have a second phone line available, try connecting the modem to that line.
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Troubleshooting