phone

127 Articles

How TTY Opened Up The Phones For The Hard Of Hearing

April 30, 2026 by 16 Comments

The telephone was an invention that revolutionized human communication. No more did you have to physically courier a letter from one place to another, or send a telegram, or have a runner carry the message for you. Instead, you could have a direct conversation with another person a great distance away. All well and good if you can speak and hear, of course, but rather useless if you happen to be deaf.

Those hard of hearing were not left entirely out of the communication revolution, however. Well before IP switched networks and the Internet became a thing, there was already a way for the deaf to communicate over the plain old telephone network—thanks to the teletypewriter!

Over The Wires

The teletypewriter (TTY) has been around for a long time. The first device came into being in 1964, developed by James C. Marsters and Robert Weitbrecht, both deaf. Their idea was to create a method for deaf individuals to communicate over the phone network in a textual manner. To this end, the group sourced teleprinters formerly used by the US Department of Defense, and hooked them up with acoustic couplers that would allow them to mate with the then-ubiquitous AT&T Model 500 telephone. Thus, the TTY was born. A user could dial another TTY machine, and key in a message, which would print out at the other end. The receiving user could then respond in turn in the same manner.

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Payphone Tag Is Australia’s New National Sport

April 28, 2026 by 44 Comments

Australia’s payphones are an iconic part of the national landscape, even if they’re not as important as they once used to be. However, they’re having a resurgence of late, in part thanks to a new national pastime—the sport of Payphone Tag!

Created by [Alex Allchin], the game is simple. To play, you first sign up on the website and get your emoji and 5-digit PIN. You then go out and find a payphone, dial the Payphone Tag number, and enter your PIN when prompted. This lets you “capture” the phone, raising your score in the game. If a phone is already captured, no matter—just head out there, dial the number, and key in your own PIN to steal it. You can also push your score even higher by capturing three payphones in a triangle on the map to get bonus points.

It’s a fun geospatial game that’s also free to play, because Telstra made payphone calls free back in 2022. It might cost you a bit to get out to some phones, but there are plenty you can reach with the aid of free public transport at the moment, anyway. Protip—at the time of writing, there are a ton of easy captures to be had on Kangaroo Island. It might just cost you a pretty penny to get out there. Have at it!

We’d love to see some stats from Telstra as to whether this is making a dent in overall payphone usage rates. In any case, there were 800 players in the last 7 days and a full 36,640 captures so far, so a lot is happening out there. We fully expect to see this concept spread to other nations in turn, though it might be less attractive in places where you still need to dig out a coin to make a call.

We’ve featured a few payphone hacks over the years. If you’re doing something rad with these telecommunication devices of yesteryear, we’d love to hear about it on the tipsline.

Old Desk Phone Gets DOOM Port

March 3, 2026 by 2 Comments

Old desk phones are fairly useless these days unless you’re building a corporate PBX in your house. However, they can be fun to hack on, as [0x19] demonstrates by porting DOOM to a Snom 360 office phone. 

The Snom 360 is a device from the early VoIP era, with [ox19] laying their hands on some examples from 2005. The initial plan was just to do some telephony with Asterisk, but [ox19] soon realized more was possible. Digging into a firmware image revealed the device ran a Linux kernel on a MIPS chip, so the way forward became obvious.

They set about hacking the phone to run DOOM on its ancient single-color LCD. Doing so was no mean feat. It required compilation of custom firmware, pulling over a better version of BusyBox, and reworking doomgeneric to run on this oddball platform. It also required figuring out how the keyboard was read and the screen was driven to write custom drivers—not at all trivial things on a bespoke phone platform. With all that done, though, [0x19] had a dodgy version of DOOM running slowly on a desk phone on a barely-legible LCD display.

Porting DOOM is generally a task done more for the technical thrill than to actually play the game on terribly limited hardware. We love seeing it done, whether the game is ported to a LEGO brick or a pair of earbuds. If you’re doing your own silly port, don’t hesitate to notify the tipsline—just make sure it’s one we haven’t seen before.

A Working Intercom From Antique Telephones

February 9, 2026 by 13 Comments

Although it can be hard to imagine in today’s semiconductor-powered, digital world, there was electrical technology around before the widespread adoption of the transistor in the latter half of the 1900s that could do more than provide lighting. People figured out clever ways to send information around analog systems, whether that was a telegraph or a telephone. These systems are almost completely obsolete these days thanks to digital technology, leaving a large number of rotary phones and other communications systems relegated to the dustbin of history. [Attoparsec] brought a few of these old machines back to life anyway, setting up a local intercom system with technology faithful to this pre-digital era.

These phones date well before the rotary phone that some of us may be familiar with, to a time where landline phones had batteries installed in them to provide current to the analog voice circuit. A transformer isolated the DC out of the line and amplified the voice signal. A generator was included in parallel which, when operated by hand, could ring the other phones on the line. The challenge to this build was keeping everything period-appropriate, with a few compromises made for the batteries which are D-cell batteries with a recreation case. [Attoparsec] even found cloth wiring meant for guitars to keep the insides looking like they’re still 100 years old. Beyond that, a few plastic parts needed to be fabricated to make sure the circuit was working properly, but for a relatively simple machine the repairs were relatively straightforward.

The other key to getting an intercom set up in a house is exterior to the phones themselves. There needs to be some sort of wiring connecting the phones, and [Attoparsec] had a number of existing phone wiring options already available in his house. He only needed to run a few extra wires to get the phones located in his preferred spots. After everything is hooked up, the phones work just as they would have when they were new, although their actual utility is limited by the availability of things like smartphones. But, if you have enough of these antiques, you can always build your own analog phone network from the ground up to support them all.

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Meet Me On My Rotary Phone

November 14, 2025 by 8 Comments

We suspect kids today — and some adults — are confused about phone terminology. In today’s world, “hanging up” and “dialing,” for example, are abstract words without the physical reference that older people remember. But some people have a soft spot for the old rotary dial phones, including [Stavros], who wired a rotary phone to his computer for use on online meetings. Check out the video below.

He took an old rotary phone and wanted to program a Raspberry Pi Zero to act as a sound card and a keyboard. That way, he could connect to the meeting by picking up the handset and disconnect by hanging up. He also planned to read the dial and convert that into keyboard input.

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Factorio Running On Mobile

October 15, 2025 by 27 Comments

As a video game, DOOM has achieved cult status not just for its legendary gameplay and milestone developments but also because it’s the piece of software that’s likely been ported to the most number of platforms. Almost everything with a processor can run the 1993 shooter, but as it ages, this becomes less of a challenge. More modern games are starting to move into this position, and Factorio may be taking a leading position. [Point Substantial] has gotten this game to run on a mobile phone.

The minimum system requirements for Factorio are enough to make this a challenge, especially compared to vintage title like DOOM. For Linux systems a dual-core processor and 8 GB of memory are needed, as well as something with at least 1 GB of VRAM. [Point_Substantial]’s Xiaomi Mi 9T almost meets these official minimum requirements, with the notable exception of RAM. This problem was solved by adding 6 GB of swap space to make up for the difference.

The real key to getting this running is that this phone doesn’t run Android, it runs the Linux-only postmarketOS. Since it’s a full-fledged Linux distribution rather than Android, it can run any software any other Linux computer can, including Steam. And it can also easily handle inputs for periphreals including a Switch Pro controller, which is important because this game doesn’t have touch inputs programmed natively.

The other tool that [Point_Substantial] needed was box86/box64, a translation layer to run x86 code on ARM. But with all the pieces in place it’s quite possible to run plenty of games semi-natively on a system like this. In fact, we’d argue it’s a shame that more phones don’t have support for Linux distributions like postmarketOS based on the latest news about Android.

Thanks to [Keith] for the tip!

Acoustic Coupling Like It’s 1985

August 27, 2025 by 19 Comments

Before the days of mobile broadband, and before broadband itself even, there was a time where Internet access was provided by phone lines. To get onto a BBS or chat on ICQ required dialing a phone number and accoustically coupling a computer to the phone system. The digital data transmitted as audio didn’t have a lot of bandwidth by today’s standards but it was revolutionary for the time. [Nino] is taking us back to that era by using a serial modem at his house and a device that can communicate to it through any phone, including a public pay phone.

As someone in the present time can imagine, a huge challenge of this project wasn’t technical. Simply finding a working public phone in an era of smartphones was a major hurdle, and at one point involved accidentally upsetting local drug dealers. Eventually [Nino] finds a working pay phone that takes more than one type of coin and isn’t in a loud place where he can duct tape the receiver to his home brew modem and connect back to his computer in his house over the phone line like it’s 1994 again.

Of course with an analog connection like this on old, public hardware there were bound to be a few other issues as well. There were some quirks with the modems including them not hanging up properly and not processing commands quickly enough. [Nino] surmises that something like this hasn’t been done in 20 years, and while this might be true for pay phones we have seen other projects that use VoIP systems at desk phones to accomplish a similar task.

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