Teletronics TT 2400 - Manual (Page 31)

802.11d is a wireless network communications specification for use in countries where systems using other standards
in the 802.11 family are not allowed to operate. The 802.11d specification is well suited for systems that want to
provide global Roaming.
ACK Timeout
When a packet is sent out from 802.11 Station A it will then wait for an 'ACKnowledgement frame' from 802.11 Station
B. Station A will only wait for a certain amount of time (ACK timeout) or ACK window. If the ACK is NOT received within
that timeout period then the packet will be re-transmitted from Station A resulting in reduced throughput. When sending
LOTS of packets as in 802.11g and 802.11a the constant re-transmission could cost severe performance degradation
due to the ACK frame not making it back to 802.11 Station A in time. This will have a dramatic impact on the throughput
of the link regardless of the quantity of signal strength and good receiver sensitivity.
Antenna Selection
* Please refer to Appendix G on page 60 for farther information.