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Old 04-03-2025, 08:33 AM
Bill14564 Bill14564 is offline
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Quote:
Originally Posted by retiredguy123 View Post
I don't think that is correct. Why does Amazon sell an adapter that doesn't work? Read the product description below and the reviews:

Amazon.com

I had a VIOP system years ago, and I used a regular cordless phone with it. Also, see Post No. 8.
Package includes:
2 * 6 inch RJ45 to RJ11 cables
2 * RJ45 Coupler female to female
This enables you to use the internet wiring in your home to carry your public switched telephone network (PSTN, RJ11, "regular" telephone line). Look at the details in the Connection Schematic (third image down).

If you have:
- VOIP phone service through Xfinity
- An Xfinity router that has an RJ11 jack for plugging in a phone to the phone service
- A home wired for internet with RJ45 jacks

Then you can use the wires and couplers provided by this kit to move the RJ11 connection from the modem through your house to wherever you want your plain old telephone to be.

In the VOIP system you had before, you plugged your regular cordless phone base station into the system using an RJ11 cable. Maybe you plugged your Modem into the phone jack in the wall using an RJ11 cable. You were able to do that because you had RJ11 throughout your home.

This adapter works for "smart homes" that are wired for RJ45 rather than RJ11. Why would anyone do that? Because no one uses a regular phone anymore, everyone uses a cell phone instead. But what if you're not "everyone" and you do have a regular phone? Well, this kit allows you to use the RJ45 wiring in your smart home.

NOTE: You would probably need a third Coupler to make this work. One coupler would connect the RJ11 from the modem to the RJ45 in the wall. The second coupler would connect the RJ45 from the wall to the RJ11 on your phone. But both of those wall connections need to be connected together in the wiring closet and for that you would need a third coupler.


POST #8:
This post suggests using an OOMA box. If you taped the OOMA box to the back of a plain telephone then you would have a less expensive version of the VOIP phone in the room. Both the VOIP phone and the OOMA box would connect to the ethernet connection in the wall. Both the VOIP phone and the OOMA box have a handset that you speak into. Importantly, both the VOIP phone and the OOMA box MUST connect to a management server that speaks ethernet on one side and PSTN on the other to provide a phone number and a dial tone. The server for the VOIP phone is likely in the basement of the facility while the server for the OOMA box is at OOMA headquarters.

The VOIP phone has a telephone number associated with it. To use an OOMA device would require either porting that number to OOMA, which is not likely to be allowed by the current VOIP provider, or getting a new phone number. If someone wanted to go that route, great, but at that point it would be simpler to just get a cell phone. The ONLY thing OOMA features that a cell phone does not is that it works over wires rather than relying on a cell signal and cell tower. On the other hand, if the facility provides wifi then the cell phone can be configured to use wifi-calling and take advantage of both the mobile network and the internet.

NOTE 2: This is one limitation to having phone and internet through T-Mobile: Both use the same cell tower so if cell service is poor to the phone then it is also poor to the internet and wifi-calling doesn't help.
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Last edited by Bill14564; 04-03-2025 at 08:45 AM.