User's Manual

GSM/802.11b RadioFrame System Method of Procedure
Appendix A: Glossary
RadioFrame Networks, Inc.
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Appendix A Glossary
Acronym Term Description
10BaseT
10BaseT is the most common form of Ethernet cabling. The
cable is thinner and more flexible than the coaxial cable used
for the 10Base2 standard. 10BaseT is also known as
unshielded twisted-pair (UTP). 10BaseT cables support
speeds up to 10 Mbps. The maximum distance per segment is
500 meters.
ACU
Airlink Chassis Unit
The central baseband processing unit for the RFS. Rx/Tx
airlink traffic to/from RFUs.
APC
Airlink Processing Card
Interface to the RIC for the control of RFU components and the
transfer of voice I/Q samples to/from RFUs.
BCU
Base Chassis Unit
The central network processing unit for the RFS. Also central
management entity for managing configuration and User
Information.
BLIC
RadioFrame LAN
Interface Card
Provide the Ethernet switch fabric to route packets to/from
ACUs. Also hosts a micro-P serving as primary controller of
BPCs.
BPC
Baseband Processing
Cards
Interface to the BLIC for the bi-directional transfer of voice I
and Q samples to/from RFUs.
CRIC
Common RadioFrame
Interface Card
When a CRIC is installed in a chassis unit, it looks to see if
there is a PERTM. If there is a PERTM, the CRIC acts as a
RIC (see RIC). If there is not a PERTM, the CRIC acts as an
BLIC (see BLIC).
CSU
Channel Service Unit
The CSU provides the T-1 connection between the RFS and
the telephone company that provides the T-1 line.
DLC
Digital Line Card
EIA
Electronic Industries
Alliance
The EIA organization establishes electronic interface
standards.
EAS
Environmental Alarm
System
The EAS provides a central location for site alarm signal
processing. The EAS monitors environmental conditions of the
site, including power, smoke alarms, and intrusion alarms.
ERTM
Ethernet Rear Transition
Module
Located in the BCU, provides clock and data to the ACU.
ESD
Electrostatic Discharge
The dissipation of electricity, commonly known as a shock.
ESD can destroy semiconductor products, even when the
discharge is too small to be felt.
FRU
Field Replaceable Unit
Any unit (module, board, or card) that can be “hot-swapped”,
that is, replaced with another unit while the power is connected
to the item housing the unit.
GSM
Global System for
Mobile Communications
PERTM
Powered Ethernet Rear
Transition Module
Located in the ACU, provides power, clock, and data to the
RFUs.
RB
RadioBlade Provides the airlink interface for the GSM standard.
RFN
RadioFrame Networks Equipment designer and manufacturer of RFS equipment.