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non facility associated signalling (NFAS)

Non Facility Associated Signalling (NFAS) is a signalling protocol

that is transmitted in a transmission path that is completely separate from the carrier channel. In ISDN, one D channel is sufficient for signalling when several B channels are bundled.

In return, the other D channels can be used for data transmission. NFAS is only possible in conjunction with a basic connection to a T1 line.

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Englisch: non facility associated signalling - NFAS
Updated at: 07.07.2011
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Translations: DE