| 词条 | Bell 212A |
| 释义 |
The Bell 212A modulation scheme defined a standard method of transmitting full-duplex asynchronous serial data at 1.2 kbit/s over analogue transmission lines. The equivalent, but incompatible ITU-T standard is V.22. DeviceThe Bell 212 Dataset is a 1979-vintage modem used for communicating over telephone lines at 300 or 1200 bits per second.[1] See also
References1. ^{{Citation | title = BSP 592-039-100: Data Set 212AR-L1A/2A -- Transmitter-Receiver -- Description and Operation | publisher = American Telephone & Telegraph Co | journal = Bell System Practices | volume = | issue = | pages = | date = June 1979}} {{DEFAULTSORT:Bell 212a}}{{Telecomm-stub}} 2 : Data transmission|Telecommunications-related introductions in 1979 |
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