US Robotics COURIER User Manual page 195

COURIER HIGH SPEED MODEMS
when the power is turned off. The modem's RAM holds the cur-
rent operational settings, a flow control buffer, and a command
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buffer. -
Remote Access
A feature that allows a remotely-located user to view the
Courier's configuration screens and change the Courier's
configuration. Password protection is available.
Remote Digital Loopback
A test that checks the phone link and a remote modem's trans-
mitter and receiver. Data entered from the keyboard is trans-
mitted from the initiating modem, received by the remote
modem's receiver, looped through its transmitter, and returned
to the local screen for verification.
Remote Echo
ROM
A copy of the data received by the remote system, returned to
the sending system and displayed on the screen. Remote echo-
ing is a function of the remote system.
Read Only Memory. Permanent memory, not user-pro-
grammable. The Courier's factory settings are stored in ROM
and can be read (loaded) into RAM as an operational configura-
tion if DIP switch SlO is ON at power on.
Serial Transmission
The transfer of data characters one bit at a time, sequentially,
using a single electrical path. See Parallel Transmission.
Start/Stop Bits
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The signaling bits attached to a character before the character is -
transmitted during Asynchronous Transmission.
SDLC
Synchronous Data Link Control. A protocol developed by IBM
for software applications and communicating devices operating
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in IBM's Systems Network Architecture (SNA). The protocol -
defines operations at the link level of communications, for
example, the format of data frames exchanged between modems
over a phone line. See Bisync, Protocol, HDLC. _
G-1 O Glossary
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