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| start character; start-of-message character | |||
| answer meter signal; answer metre signal; answer signal (from called station, PABX); off-hook signal | |||
| start signal | |||
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Beginnzeichen : 5 a las frases, 3 temas |
| Comunicaciones | 2 |
| Tecnología | 1 |
| Telecomunicación | 2 |