Telephone is a softphone for macOS developed by 64 Characters. It uses Session Initiation Protocol for communication. Telephone is distributed as free software under the GPL-3.0-or-later license.
 | |
| Developer(s) | 64 Characters |
|---|---|
| Stable release | 1.5.2[1]  / 2 November 2020 |
| Written in | Objective-C, Swift |
| Operating system | macOS |
| Available in | English, German, Russian |
| License | 2016: GPL-3.0-or-later[2] 2008: BSD-3-Clause[3] |
| Website | www.64characters.com/telephone |