User Manual

AirLink VoiceXtender VX64 Modem Installer’s Guide
Glossary
C-4 Rev. A - 8/97
REN Ringer Equivalent Number. Older model phones typically have
a REN=1. Some electronic phones and other devices have a lower
REN.
RF Radio Frequency. Electromagnetic waves propagated without
guide (wire or cable) in free space.
Send Timing A timing mode where the transmit timing is provided internally
by the modem.
Simplex Operating a channel in one direction only with no ability to
operate in the other direction.
Slave Modem The slave modem is the modem which is under control of the
master modem. The slave modem always transmits a burst in
reaction to a received burst from the master modem. The slave
modem is incapable of initiating any activity of its own.
Synchronous Data
Transmission
The transmission of data in which both stations are
synchronized. Timing codes are sent from the transmitting station
to the receiving station to establish the synchronization. The
data is then transmitted in continuous streams.
System Gain The overall signal gain from input to output of a device or several
devices connected as a system.
Terminal Timing A timing mode where the transmit timing is provided to the
modem via an externally wired path. Generally, this path is a
loop through the DTE.
Transmitter Output Power The amount of transmitted signal strength measured at the
antenna post of the modem.