noun
station-to-station call
Computing term for a direct communication between two stations without operator assistance. Rare in everyday conversation; mainly seen in technical contexts.
このシステムでは、番号通話によって端末同士が直接接続される。
In this system, terminals are connected directly via station-to-station calls.
Compound of 番号 (number) and 通話 (telephone call), literally 'number call'. The exact historical derivation is uncertain; the term is used in computing contexts.