Psion Teklogix Vehicle-Mount Computer 8255, User Manual, Page: 291 / 348

Teklogix 7035, 8255 & 8260 Terminals User Manual
D-7
Appendix D:Radio Parameters
TRX7431 WaveLAN/IEEE 802.11 DS SS Radios
Initial RTT (Round Trip Time)
Round trip time is the elapsed time between a terminal transmission and an access
point acknowledgement. Each terminal continuously adjusts the acceptable round
trip time, calculating the average elapsed time over a number of transmissions. If
an acknowledgement takes longer to receive than the average round trip time
calculated, the terminal will resend the transmission.
Because terminals cannot calculate an average round trip time without a number of
transmissions, a starting point or “Initial Round Trip Time” is required. The terminal
uses the time assigned to the “Initial RTT” parameter as a starting value for round
trip calculations. Once the terminal begins transmitting and receiving data, this
value will be adjusted to reflect the actual average round trip time between transmis-
sions and acknowledgements.
CIS Data
This sub-menu displays Card Information Structure (CIS) data, manufacturer
information describing the radio installed in your terminal, including the terminal
hardware address.
Lucent Technologies
WaveLAN/IEEE
Version 01.01
Pri:1.1 Sta:2.0
WEP: 128 bit
00:60:1D:03:79:E5
10 - FCC-USA
20 - Industry Canada
CIS Data