0ur opinion:

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The DUALjack is a wireless extension of the telephone jack and plugs into any standard power outlet. The DUALjack has a built-in feature to ensure that voice calls initiated from any telephone in the house are given priority over modem/data calls initiated via a DUALjack Extension unit. The lntercom capability is useful in situations where there are two or more Extension units in the house. The lntercom function is disabled when any Extension unit is engaged in a call with the outside telephone line. lf a telephone attached to an Extension unit is engaged in a voice call with the outside telephone line, a barge-in tone will be heard on that phone when a second Extension unit goes off-hook. Up to two Extension units can be joined together with the outside line at any one time. Energy efficient design saves electricity DUALjack works with - Corded&Cordless Phones, Answering Machines, Fax Machines, PC Modems, Digital Video Recorder / Tivo, Satelite/DirectTV/Dish, VolP Adapters DUALjack is compatible with - Caller lD, Call waiting, 3-way calling, Conference calling, Speed dialing

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Buyer's feedback: - * EXCELLENT PRODUCT!!! ...
Without a doubt this is one of the best product out there. Any other product, other than this one, will have a good chance of disapointing you. Since it is works on a 2.4ghz radio frequency there less chance of you getting that annoying "buzzing", noisy line sound you get with the other powerline phone jacks.

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Buyer's feedback: - Had it almost 1 year and works great! Price has more than doulbled!
Brought this product almost a year ago and it works great. Don't buy anything else. This product works. I guess the manufacturer knows it's a great product also... it now costs more than twice what I paid for it.

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Buyer's feedback: - * Fits my needs exactly ...
I purchased this product to provide remote phone and fax service now that I have switched to Vonage. I plugged it in, connected the phone lines, and it went to work. That simple and quick.

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Buyer's feedback: - EXCELLENT RTX DUALjack RTX3241S - white; THIS PRODUCT IS DIGITAL AND HAS ENCRYPTION.
THIS HAS 128 BIT ENCRYPTION.[WHICH WAS NOT ADVERTISED.] THIS ITEM IS GREATTT !!! YOU CAN AT ANY TIME CHANGE ENCRYPTION CODE IN 30SECONDS; JUST PLUG AND UNPLUG BOTH BASE AND EXTENSION UNITS AT SAME TIME !! I GOING TO BUY MORE!

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Buyer's feedback: - * RTX Dual jack works ...
After reading multiple reviews here at amazon, i decided to buy the RT Dual Jack and it sure didn't disappoint. Like others i got mine to avoid the dish satellite connectivity fee. Setup is instant and with caller-id enabled, i can see who's calling in my TV set. Receiver Jack is 1 floor and 30 feet away and there is no issue in signal. Highly recommended.