Installation guide

TD 92408EN
9 December 2011 / Ver. G
System Planning
Ascom VoWiFi System
2
DiffServ Differented Services (TOS field)
dBm Power ratio in decibels (dB) referenced to one m
illiwatt (mW).
DFS Dynamic Frequency Selection
DSCP Differentiated Services Code Point
DTIM Delivery Traffic Indication Message
EAP Extensible Authentication Protocol.
EAP-FAST EAP-Flexible Authentication via Secured Tunnel.
EAP-TLS EAP-Transport Layer Security.
EDCF 802.11e Enhanced Distributed Coordination Function.
ESSID Extended Service Set Identifier:
used in an infrastructure WLAN that includes an AP.
ETSI European Telecommunications
Standards Institu
te.
FCC Federal Communications Commi
ssion.
FSL Free Space Loss.
Greenfield
mo
d
e
A pure high throughput (HT) mode where packets are transmitted
without a legacy-compatible part.
IEEE Institute of Electrical and Electr
onics Engineers
IMS3 Integrated Wireless Messaging and Services:
a Unite module that enables wireless services to and from the VoWiFi
Handsets
in a WLAN system. It also includes the Device Manager.
IP Internet Protocol:
global standard that defines how to send data from one device t
o
another over the wired and wireless media.
MAC Medium Access Control
MIMO Multiple Input Multiple Output. Handles the use of multiple radio
cha
i
ns.
Multipath The receiver not only contains a direct line-of-sight
radio wave, but
also a larger number of reflected radio waves.
OTA Over-the-air
PEAP MSCHAP Protected EAP Microsoft Challenge Handshake Authentication
Pro
tocol.
PoE Power ove
r Ethernet
QoS Quality of Service:
Defines to what extent transmission rates, error rates etc. are
guaran
teed in advance.
RF Radio Frequency.
RFID Radio Frequency Identification.
RSSI Received signal str
e
ngth indication.
RTP Real-time Transport Protocol
SGI Short Guard Interval, a tighter intersymbol time gap in a WiFi
transmission that reduces the idle overhead and may improve
throughput with around 10%
.
SIS
O Single-Input and Single-Output, the use of only one antenna bot
h in
the AP and STA.
SNR Signal-to-noise-ratio.
SSID Service Set IDentifier. The name assigned t
o
a wireless Wi-Fi network.