| Bell 202 Modem |
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In North America (and perhaps elsewhere), Bell 202 modulation is used to transmit Caller ID information on the Public Telephone Network . It is also employed in some commercial settings. Surplus Bell 202 modems were used by Amateur Radio operators to construct the first Packet Radio stations, and despite its low Signalling Speed , Bell 202 modulation remains the standard for amateur VHF operation in most areas. Notably, Automatic Position Reporting System transmissions are most often encoded this way. RELATED TECHNOLOGY The ITU-T V.23 communications standard defines a similar modulation scheme. SEE ALSO |
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