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RAM
Simplex Transmission
Transorb
V.24
V.28
Random Access Memory (RAM) is power dependent (or volatile) read
and write capable memory which accepts downloaded code and then is ac-
cessed by the Central Processing Unit as required for program execution.
Since it is volatile, it must be refreshed continually.
In simplex transmission, data is transferred in one direction only and no
provision is made for transmission in the other direction. (See also Duplex)
A voltage limiter made by pairing two zener diodes. The resulting restric-
tion to voltage is bi-polar and varies according to design.
The CCITT recommended standard defming the signals and their charac-
teristics for use in transmissions on international switched telephone net-
works.
The CCITT recommended standard for the electrical specifications for
use in transmissions on international switched telephone networks.
Reference 6-3
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