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busy signal · Vinony

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EntityQ844317· pop 9· linked from 51 articles

busy signal

type of call-progress tone

Connections

Republic of Ireland

Categories

Telephony signals

Sources

wikipedia.externallinksexternallink

second

Entity

Integrated Services Digital Network

radio broadcasting

European Telecommunications Standards Institute

Dual-tone multi-frequency signaling

business telephone system

Signalling System No. 7

decibel milliwatt

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What links here51 pages

strowger switch

telephone switchboard

bulletin board system

best-effort delivery

Dual-tone multi-frequency signaling