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Last week, we bought a new phone modem - Arris TM 3402A. This week I tried to connect a phone to it. No anything. No dial tone. No light on the front of the modem. The phone I used to connect to the modem works when connected to a land line jack.
My Correction #3
My bad. The batteries are expensive...$30!
On page 5 of the PDF version for my statement dated Apr 14, 2018-May 13, 2018:
"...you may order backup batteries from Cox by call (855) 324-7700 or visiting a Cox Solution Store. The cost for an 8-hour battery from Cox currently is $29.99, but subject to change."
"The Cox battery is warranted for one year."
"The battery offered by Cox is designed to fit directly into your specific telephone modem and may not be available at retail stores."
Also on the PDF, Cox repeatedly warns me to purchase "additional" batteries...at $29.99 mind you...as "reserve backup batteries."
Bruce said:On page 5 of the PDF version for my statement dated Apr 14, 2018-May 13, 2018:
That is for phone modems that have normal internal batteries, like the DPQ3212. TM3402A isn't your typical phone modem. It is designed to be used with gigablast fiber internet, which usually use external UPCs for power for the fiber ONT.
meddoc1724 doesn't have a TM3402A. It's also a reference for questions on telephone modem batteries.
How do you know? They only made 1 post and it wasn't even factually correct. You don't need a battery to make a phone modem work. Granted, it's good advice in general, I just didn't want OP calling that number looking for a battery for the 3402. Cox might not even know better and sell them one anyway, and it wouldn't work.