Chapter 7 Wireless 128
Parameters description
WMM (Wi-Fi Multi-media) is a wireless QoS (Quality of Service) protocol making
packets with higher priorities to be transmitted earlier. This ensures better QoS
of voice and video applications over wireless networks.
APSD (Automatic Power Save Delivery) is a WMM power saving protocol created
by Wi-Fi Alliance.
Enabling APSD helps reduce power consumption. By default, this mode is
disabled.
It specifies the minimum strength of received signals acceptable to this device.
If the strength of the signals transmitted by a wireless device is weaker than this
threshold, the wireless device cannot connect to this device.
If there are multiple CPEs in a network, setting a proper value helps wireless
devices connect to WiFi network with better WiFi signal.
It specifies a group of bits located at the beginning of a packet to enable a
receiver of the packet to perform synchronization and prepare for receiving
data.
By default, the Long Preamble option is selected for compatibility with old
network adapters installed on wireless clients.
To achieve better synchronization performance of networks, you can select the
Short Preamble option.
With this function enabled, the CPE can achieve bidirectional transparent
transmission, solving the problem that the NVR cannot detect IP cameras.
Only available in AP, Client, and Universal Repeater modes.
IMAX is IP-COM's proprietary Time Division Multiple Access (IMAX) polling
technology. It assigns time slots for each device communication to avoid the
“hidden node” problem, which occurs when a node is visible from a wireless AP,
but not from other nodes communicating with the originating AP.
IMAX improves overall performance in Point‑to‑MultiPoint (PtMP) installations
and noisy environments, because it reduces latency, and offers better tolerance
against interference. Because of its advantages, IMAX also increases the
maximum possible number of users that can associate with an AP that uses
IMAX.
If IMAX is enabled, the device operates in IMAX mode and only accepts
connections from IMAX devices. And you cannot connect standard Wi-Fi
devices, such as laptops, tablets, or smart phones, to the CPE.
It specifies the wall penetrating capability of the CPE.
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