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| service communications | |||
| service traffic (на линиях междугородной связи) | |||
| engineering communication (between service engineers and operators) | |||
| business telecommunication | |||
| engineering circuit; engineering orderwire circuit; engineering speaker circuit; order circuit; orderwire circuit; service circuit (between trunk exchanges); speaker circuit; speaker channel; traffic circuit | |||
| orderwire communication | |||
| official traffic; order-wire service; intercom; intercommunication; orderwire (MichaelBurov); order wire (MichaelBurov); orderwire service (ssn) | |||
| service communication (MichaelBurov) | |||
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| duty room for communication (Bauirjan) | |||
| служебная связь: 131 phrases in 16 subjects |