| English | Russian |
| PSTN connectivity | связь с ТСОП (Connectivity with the public switched telephone network (PSTN) through integration with an audio conferencing provider) |
| PSTN usage records | режим работы с ТСОП (Public switched telephone network (PSTN) usage records specify a class of call (such as internal, local, or long distance) that can be made by various users or groups of users in an organization) |
| SIP/PSTN gateway | шлюз SIP / ТСОП (A device that translates signaling and media in different formats between the Enterprise Voice infrastructure and a public switched telephone network (PSTN) or private branch exchange (PBX)) |
