RadioFrame Networks Inc DH2 User Manual
Method of Procedure
Appendix A: Glossary
Appendix A: Glossary
138
RFN_3.1 Beta
Appendix A Glossary
Acronym
Term
Description
10Base2
10Base2 is also known as Thin Ethernet. 10Base2 cables
support transmission speeds up to 10 Mbits/second. The
maximum distance per segment is 185 meters.
support transmission speeds up to 10 Mbits/second. The
maximum distance per segment is 185 meters.
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.
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.
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.
transfer of voice I/Q samples to/from RFUs.
CSU
Channel Service Unit
The CSU provides the T-1 connection between the iSC-3 and
the telephone company that provides the T-1 line.
the telephone company that provides the T-1 line.
EIA
Electronic Industries
Alliance
The EIA organization establishes electronic interface
standards.
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.
processing. The EAS monitors environmental conditions of the
site, including power, smoke alarms, and intrusion alarms.
ERTM
Ethernet Rear Transition
Module
Located in the NCU, 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.
ESD can destroy semiconductor products, even when the
discharge is too small to be felt.
ethernet media
converter
Hardware box that converts the 10base2 (coaxial television)
cable to a 10baseT (RJ45) cable. In the RadioFrame System,
this hardware connects the 10base2 cable coming from the
iSC-3 to Port 1 of the NCU.
cable to a 10baseT (RJ45) cable. In the RadioFrame System,
this hardware connects the 10base2 cable coming from the
iSC-3 to Port 1 of the NCU.
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.
that is, replaced with another unit while the power is connected
to the item housing the unit.
GPS
Global Positioning
System
A system that uses geostationary satellites to triangulate the
position of a GPS receiver located on earth.
position of a GPS receiver located on earth.
ground strap
A metal strip placed between the antennas of RadioBlade that
are installed in an RFU. It prevents RF attenuation within the
RFU.
are installed in an RFU. It prevents RF attenuation within the
RFU.
iDEN
integrated Digital
Enhanced Network
Motorola’s proprietary digital technology that combines the
capabilities of a standard analog dispatch system with that of a
cellular interconnect system. iDEN uses an advanced
proprietary modulation technology consisting of a speech
compression scheme enabling three or six communication
paths over a single 25 kHz RF channel.
capabilities of a standard analog dispatch system with that of a
cellular interconnect system. iDEN uses an advanced
proprietary modulation technology consisting of a speech
compression scheme enabling three or six communication
paths over a single 25 kHz RF channel.
iSC-3
integrated Site
Controller
The controller and communications gateway between the RFS
and the RFN customer central network. The iSC-3 is required
for all RadioFrame Networks iDEN installations.
and the RFN customer central network. The iSC-3 is required
for all RadioFrame Networks iDEN installations.