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COMSPHERE 3900 Series Modems
GL-10 November 1996 3910-A2-GN32-30
Time Division
Multiplexer (TDM)
A device that enables the simultaneous transmission of multiple
independent data streams into a single high-speed data stream by
simultaneously sampling the independent data streams and
combining these samples to form the high-speed stream.
TMp Trellis Multipoint. Paradyne’s proprietary high speed, fast poll
multipoint modulation scheme.
Top-Level menu The very top of the menu tree that displays modem status and all
Top-Level menu branches.
training
A process where two modems try to establish a connection over
the VF line.
trellis-coded modulation
A modulation scheme developed by Paradyne which uses Forward
Error Correction for multipoint and high-speed point-to-point
applications.
tributary modem Tributary modems in a network receive data from the control
modem, as well as from the network management system in the
network.
UL Underwriter’s Laboratories, Inc.
UNIX Dial
A factory preset configuration area containing the configuration
options most often used in a UNIX
r dial network.
USOC Universal Service Ordering Codes.
upstream modem
A device connected “closer” to the host computer
.
V.32 terbo
A modulation that adds the 19,200 bps and 16,800 bps data rates to
the V
.32bis data rates. It is a Paradyne proprietary modulation, not
a CCITT standard.
VF Voice Frequency. The part of the audio frequency range used to
transmit voice sound (usually 300 Hz to 3400 Hz). This band is
used by the modem for its modulated signal.
XOFF A character that tells the DTE or modem to stop transmitting data.
XON A character that tells the DTE or modem to start or resume
transmitting data.