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| IEVref: | 714-09-08 | | ID: |
| Language: | en | | Status: Standard |
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| Term: | voice-frequency signalling
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| Synonym1: | vf signalling
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| Definition: | an analogue signalling method in which the signalling information is represented by alternating current signals which have frequencies in the telephone speech band
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| Publication date: | 1992-04 |
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