Share internet connection over RJ45 to a modem with phone line input

Question

I need to make a very specific test, this is not for general use, I know it can be slow.

I have a Playstation 2 and bought a old usb modem that was used before Sony release the Network Adapter with RJ45 input.

This modem has a phone line input and a phone output like old modems.

I would like to use it to connect to internet but without using a real phone line, and sharing my connection using a RJ45 from my default router, there's some adapter or other device that can do it?

I found some adapter on amazon and aliexpress, but there's no much information in how it works.

Answer 1

A USB-RJ11 phone modem such as this can be used on PC's which have the proper drivers, e.g., those used by Windows Phone Service. The modem phone connection must be to a POTS copper line that matches the modem's locale. For example, in the USA, the standard is ~600 Ω line, 48 VDC open circuit, ~100 VAC ring signal, etc.

To connect two devices requires two modems and a line simulator, such as this. In the days of the Atari 8-bit computers computers, I made a small 48 VDC supply, with 600 Ω series resistor, to connect two 800XL's with their respective modems, at ~600 bps.

Whether you'd find the throughput of modems sufficient is one question you'd need to answer; ~50 kbps being max for POTS. Whether the Playstation 2 has phone modem drivers is another question.

BTW, I do find a phone modem useful on rare occasion to send a fax, rather than go through an online service to do so.