If you've made the break and use a VoIP service as your only landline, you may have noticed one of the main downsides of the option (especially if you live in a rural or isolated area): if the power goes out, so does your phone line. Hooking up a UPS can help, but can also be expensive and may not provide power for more than an hour or so. However, help is on the way, at least if you get your VoIP access as part of a bundled plan from Comcast. The company plans to offer Motorola's SBV5220 cable modem to at least some of its customers as part of its $39.95 Digital Voice service. The SBV5220 includes its own lithium-ion backup battery, which provides up to 8 hours of power. Of course, if you use a cordless phone and it isn't fully charged before the lights go off, this may not do you a whole lot of good, so be sure to keep those phones charged.

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