room-to-room telephone; internal communication system; house phone (в учреждении, гостинице xakepxakep); extension (one of the phones in a large building that have their own numbers and are connected to a switchboard (= a piece of equipment used to direct all phone calls): "Please give me a call back at extension 1247. "Can you put me through to Jan Robert's extension, please? CBED Alexander Demidov); interoffice telephone

busin.

interphone

comp., MS

PBX phone (A proprietary phone connected to a PBX)

Makarov.

house telephone (не имеющий прямого выхода в город – в гостинице, учреждении и т.п.); housephone (не имеющий прямого выхода в город – в гостинице, учреждении и т.п.)

oil

internal telephone

tel.

inside line (источник – Speak better Russian. A conversation manual. George Rubinstein; ссылка –