I've been getting different answers to this from friends and supposed pros:
I have DSL, via my AT&T landline, from another ISP provider, using my own DSL modem (with only a hard connection, i.e., it's not a Wi-Fi modem, as I didn't want one). If the power goes out 'locally', e.g., my neighborhood only, i.e., not affecting the local AT&T central office from which the DSL line comes (originally from my ISP), and if I have attach a battery to provide appropriate DC voltage/amperage directly to my DSL modem (until the power comes back on to power it--by the way, I have a laptop which has batteries, so I don't have to worry about that being powered for a few hours), and, supposing that there is nothing else wrong with my land line from AT&T, i.e., I can still make/receive voice calls, then can I expect that I'll still be able to access the Internet via my DSL over the land line, or does somehow (how I can't imagine) the DSL go away (so I can't resync the modem after connecting the battery when the power goes out) even though I've power to the modem again now and an active voice capability on my land line.
Again, I ask this because my ISP (whom I pay for the DSL line) says I should be able to use DSL under these circumstances, but a friend in another part of the county, who uses the same ISP for his DSL and even has the same model of modem, who powered his modem when his power went out once, says he could talk on his line but could NOT use his DSL.
Thanks for the help!
Software/Hardware used: just a Toshiba laptop and an Actiontec modem (doesn't take a battery, so I'd need to buy one and somehow adjust for the proper voltage/amperage)