Talk to your house-mates / co-workers over your own private intercom system without ever hitting the Internet. No accounts, logins, etc. required. This is a practical hobby project. Sure, it's a ...

Push-to-talk is a one-way (half-duplex) communication. When you want to talk, you press and hold down a button on the phone, or hold down the mouse button or space bar on the computer. Letting go ...

But a small number of key staffers are using a 4G-powered walkie-talkie-style technology called push-to-talk. Ensuring PTT communications are clear for all parties using the system is a top ...