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Definitions for "Guard Tone"
Keywords:  modem, tone, kingdom, wireline, pstn
Related Terms: Dtmf, Touch tone, Dual tone multi-frequency, Dual-tone multifrequency, Touch-tone, Acoustic coupler, Voice grade, Dial tone, Pots splitter, Micro-filter, Integrated services digital network, Dsl, Isdn - integrated services digital network, Isdn, Isdn line, Asymmetric digital subscriber line, Dsl modem, Asynchronous digital subscriber line, Telephony, Adsl, Asdl, Digital subscriber line, Digital subscriber lines, V.92, Tdd, Telecommunications, Filter, Microfilter, Idsl, Dsu, Xdsl, Asymmetrical digital subscriber line, Switched 56, Adsl - asymmetric digital subscriber line, Hdsl, In-band signaling, Dsu/csu, G.lite, Adsl modem, Sdsl, V.21, Dial, B-isdn, Symmetrical digital subscriber line, V.90, Isdn integrated services digital network, Line noise, Silence suppression, Data service unit, N-isdn
A guard tone is a tone emitted by the modem when it detects a carrier. Different countries use guard tones of different frequencies. For instance, the default guard tone for the United Kingdom is 1800 Hz.
docs.info.apple.com
A tone that an answering modem sends when it first answers the phone, to tell the calling modem that a modem is on the other end of the line.
providencehs.net
A tone generated by a high speed modem dial-up modem to ensure that there is sufficient bandwidth available on the PSTN circuit for transmission.
nettedautomation.com
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