User's Manual

GLOSSARY
2003 IPMobileNet, Inc. 38 IPSeries MR User Manual / Rev. A / 04-September-03
4-Level FSK A form of digital modulation in which four (4) discrete levels
of carrier frequency displacement are employed to convey
information.
802.11 Wireless LAN technology specifications, which specifies an
over-the-air interface between a wireless client and a base
station or between two wireless clients. 802.11 provide 2 or
2 Mbps transmission in the 2.5 GHz band using either
frequency hopping spread spectrum (FHSS) or direct
sequence spread spectrum (DSSS).
Analog A classification of signal in which the amplitude of the signal
may take on an infinite number of values.
Backhaul To transmit voice and data traffic from a cell site to a switch,
i.e., from a remote site to a central site.
Bessel Filter A filter with a linear phase response.
Broadband A term, which implies that the equipment can be operated
over a wide (broad) band of frequencies.
bps bits per second
CMOS Complementary Metal Oxide Semiconductor – A type of
integrated circuit with low power consumption.
Collision Tolerant Modem A specially designed modem, which can tolerate
transmissions that overlap in time.
Continuous Duty Indicates that the equipment can be operated 100% of the
time.
CRC Cyclic Redundancy Checksum – An error detection scheme
in which a known algorithm is used to operate on a message
both prior to transmission and after reception. The output of
the operation (the checksum) is compared on both sides of
the link to validate the integrity of the received message.
Data Interleaving A technique in which the order of the individual data bits
within the data to be transmitted is shifted and interleaved so
as to disassociate adjacent data bits in a message. This
scheme is complementary to forward error correction (FEC)
algorithms.