can a dsl modem be used for dial up?
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Mr. Smartypants
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No, it works completely differently. In fact a DSL 'modem' is not a modem at all--'modem' is short for 'modulator-demodulator' and a DSL device works totally differently.
efflandt
Dial up works using the landline (voice). DSL is a higher frequency on the same wire, so different type of modem (even though PPP and PPPoE are somewhat related). If you do connect a dial up modem to a phone line with DSL, the line to the dial up modem should have a DSL filter on it (to avoid interference between DSL and voice signals).
Note that AT&T DSL includes dial up access, but that is primarily for travel or in the rare case of DSL going down and does not use the same modem.
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dsl modems are not dialup, they use a splitter to seperate the data from your voice calls, no dialup is necessay as it is always on as long as you have a connection to the central office of you local service provider (as cable pair of twisted wire). dsl modems do not have an DTMF functions to make a call out to sync up with the remote modem to download data at the really slow rates of 56k. most laptops have a fax/modem capability which you could use for dialup access, but you must be subscribed for the service and have the dialup access number.