User manual

Chapter 3 Basic Settings 31
Bridge (CSMA): The DAP-3860 connects to another wireless device within the same networking
program using CSMA protocol. CSMA ensures that only one node is transmitting on the network at any
one time. Under this mode, both PTP and PTMP are available. It is highly recommended to use this
mode when the distance between two nodes is less than 20km.
Bridge (TDMA)
: The DAP-3860 connects to another wireless device within the same networking
program using TDMA protocol. TDMA divides each cellular channel into multiple time slots to increase
the amount of data that can be carried; hence increase the throughput. Under this mode, only PTP is
available and is suggested to use when the distance between the two DAP-3860s is greater than
20km.
Wireless Band
The DAP-3860 can only communicate with wireless devices of 802.11a.
Channel/Frequency
Channel varies much as the available band differs from country to country. Select a proper operating
channel in the drop-down list according to your situation.
Data Rate
Usually “Best” is preferred. Under this rate, the DAP-3860 will automatically select the highest
available rate to transmit. In some cases, however, like where there is no great demand for speed, you
can have a relatively-low data rate for compromise of a long distance.
Band Width
Four levels are available: 20MHz and 40MHz. Among them, 40MHz can enhance the data rate more
effectively, but will take more bandwidth, thus cause possible interference.
WMM
WMM (Wi-Fi Multimedia) is a subset of 802.11e. It allows wireless communication to define a priority
limit on the basis of data type, thus those time-sensitive data, like video/audio data, may own a higher
priority than common one. To enable WMM, the wireless client should support it.
Super Mode
Super mode is an effective way to enhance performance. It can boost the transmission data rate up to
108Mbps. To enable Super Mode, the remote DAP-3860 should enable the function as well.