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Glossary
O
off-hook
A telephone or modem is being used.
on-hook
A telephone or modem is not being used.
Originate mode
The modem is in a state where it is ready to transmit a call. In a
dial network, it is the modem that makes the call.
P
parity
A way of checking data accuracy by counting the number of bits
that have a value of one.
PBX
Telephone switching equipment (Private Branch Exchange)
dedicated to one customer. A PBX connects private telephones
to each other and to the public dial network.
PCMCIA
Personal Computer Memory Card International Association.
Standard used to define the physical and operational
characteristics of a ''credit card" device.
protocol
The rules for timing, format, error control, and flow control during
data transmission.
GL-8
Issue 1 November 1994
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