I would really like to know if someone could tell if this is a possible solution for a problem we are experiencing.
We have 2 VOIP phones with RJ45 input/output.
1 Switch 5 ports with RJ45 inputs/outputs.
1 Ringer box(that makes the phone ring louder) with 1 input RJ11 and one output RJ45.
I would like to start from the Switch to the Ringer with a cable I found on Ebay that starts in RJ45 and finished in RJ11, then go from the output of the ringer in RJ11 to the VOIP phone in RJ45.
Do you think this would work?
In VOIP how many wires are being used inside an RJ45 cable?
As far as I know a ringer box is an analog device that simply rings when receiving the proper signal on the line. This would not work with a voip phone which is connecting to the switch via a digital connection.
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Bad news I'm afraid, there's no way you'll be able to use this in the way you intend. As Austin said, the signals between a VOIP phone and gateway are completely different to the way an analog phone works.
VOIP uses IP to communicate and placing the ringer in the way will just block the Ethernet frames. Analog phones use voltage on pins to trigger the ringer. The ringing on an analog phone is mechanical, on a VOIP phone it's purely digital (software).
Ideally if you want to amplify a ringer you could find another VOIP capable device and put it on the same extension as the VOIP phone. I can think of a number of ways to do this but they are a bit technical and I'm not sure if you want to pursue some homebrew kit to do this or if you need a consumer device.
You could put a switch at the desk, get a Voip analog box for the ringing and plug it into that. Plug the phone into the switch as well.
Assign both of them an extension, then make a ring group extension and bond the two extensions together within it. Give that ring group extension to people within the office for that desk, and route your external number to that extension.