Việt
tổng dài kép
tổng đài nối tiếp
Anh
tandem office
tandem central office
tandem exchange
transit exchange
Đức
Knotenvermittlung
Pháp
central tandem
centre de transit
centre nodal
tandem central office,tandem exchange,tandem office,transit exchange /IT-TECH/
[DE] Knotenvermittlung
[EN] tandem central office; tandem exchange; tandem office; transit exchange
[FR] central tandem; centre de transit; centre nodal