Lancom Systems L-322E Wireless 61576 User Manual
Product codes
61576
WLAN
Extension of power saving according to IEEE 802.11e by Unscheduled Automatic Power Save Delivery (equivalent to WMM Power Save). U-APSD
supports the automatic switch of clients to a doze mode. Increasmed battery lifetime for telephone calls over VoWLAN (Voice over WLAN)
supports the automatic switch of clients to a doze mode. Increasmed battery lifetime for telephone calls over VoWLAN (Voice over WLAN)
U-APSD/WMM Power Save
Maximum transmit and receive bandwith and an individual VLAN ID can be assigned to each WLAN client (MAC address)
Bandwidth limitation per WLAN client
Maximum transmit and receive bandwith can be assigned to each SSID
Bandwidth limitation per SSID
If the link of a chosen LAN interface breaks down, a WLAN module can be deactivated to let the associated clients search for a new base station
Broken link detection
Detection of rogue AP's and the channel information for all WLAN channels during normal AP operation. The Background Scan Time Interval defines
the time slots in which an AP or Router searches for a foreign WLAN network in its vicinity. The time interval can be specified in either milliseconds,
seconds, minutes, hours or days
the time slots in which an AP or Router searches for a foreign WLAN network in its vicinity. The time interval can be specified in either milliseconds,
seconds, minutes, hours or days
Background scanning
Rogue WLAN client detection based on probe requests
Client detection
Authentication of an access point in WLAN client mode at another access point via IEEE 802.1X (EAP-TLS, EAP-TTLS and PEAP)
IEEE 802.1X supplicant
Layer-3 Tunneling in conformity with the CAPWAP standard allows the bridging of WLANs per SSID to a separate IP subnet. Layer-2 packets are
encapsulated in Layer-3 tunnels and transported to a LANCOM WLAN controller. By doing this the access point is independent of the present
infrastructure of the network. Possible applications are roaming without changing the IP address and compounding SSIDs without using VLANs.
encapsulated in Layer-3 tunnels and transported to a LANCOM WLAN controller. By doing this the access point is independent of the present
infrastructure of the network. Possible applications are roaming without changing the IP address and compounding SSIDs without using VLANs.
Layer-3 Tunneling
The WLAN standard IEEE 802.11u (Hotspot 2.0) allows for a seamless transition from the cellular network into WLAN hotspots. Authentication
methods using SIM card information, certificates or username and password, enable an automatic, encrypted login to WLAN hotspots - without
the need to manually enter login credentials.
methods using SIM card information, certificates or username and password, enable an automatic, encrypted login to WLAN hotspots - without
the need to manually enter login credentials.
IEEE 802.11u
Auto WDS allows wireless integration of access points in existing WLAN infrastructure, including managment via WLAN controller.
Auto WDS**
The effective distances and transmission rates that can be achieved are depending of the site RF conditions
*) Note
Only in installations with WLAN controller
**) Note
LANCOM Active Radio Control
WLAN clients are directed actively to the best available access point to provide the best overall load balancing and the highest possible bandwidth
for each client. Client Steering can be based on client number, frequency band, and signal strength.
for each client. Client Steering can be based on client number, frequency band, and signal strength.
Client Steering*
Steering of WLAN clients towards the 5 GHz frequency band by restricting the access to the 2.4 GHz band.
Band Steering*
Automatic selection of optimal WLAN channels. Due to reduced channel overlaps, WLAN clients benefit from an improved data throughput. In
controller-based installations, an automatic selection of optimal channels is conducted for all managed access points.
controller-based installations, an automatic selection of optimal channels is conducted for all managed access points.
RF Optimization*
By using adaptive noise immunity an access point can cut out sources of interferences in the radio field and focusses on clients with a sufficent
signal strength. Therefore, WLAN clients profit by having a higher data throughput available due to less interferences.
signal strength. Therefore, WLAN clients profit by having a higher data throughput available due to less interferences.
Adaptive Noise Immunity
By scanning the entire RF spectrum, interferences in the WLAN can be identified and graphically illustrated. Up to 13 channels (2.4 GHz) or up to
26 channels (5 GHz) (depending on national regulations and manual configuration). Illustration of signal strength on individual WLAN channels
at a certain point of time.
26 channels (5 GHz) (depending on national regulations and manual configuration). Illustration of signal strength on individual WLAN channels
at a certain point of time.
Spectral Scan
Only in installations with WLAN controller
*) Note
IEEE 802.11n Features
MIMO technology is a technique which uses multiple transmitters to deliver multiple data streams via different spatial channels. Depending on the
existing RF conditions the throughput is multiplied with MIMO technology.
existing RF conditions the throughput is multiplied with MIMO technology.
MIMO
Two adjacent 20 MHz channels are combined to create a single 40 MHz channel. Depending on the existing RF Conditions channel bonding doubles
the throughput.
the throughput.
40 MHz Channels
Support of coexisting accesspoints with 20 and 40MHz channels in 2.4GHz band.
20/40MHz Coexistence Mechanisms in the
2.4GHz Band
2.4GHz Band
MAC Aggregation increase the IEEE 802.11 MAC efficiency by combining MAC data frames and sending it out with a single header. The receiver
acknowledges the combined MAC frame with a Block Acknowledgement. Depending on existing RF conditions, this technique improves throughput
by up to 20%.
acknowledges the combined MAC frame with a Block Acknowledgement. Depending on existing RF conditions, this technique improves throughput
by up to 20%.
MAC Aggregation and Block
Acknowledgement
Acknowledgement
Maximal Ratio Combining (MRC) enables the receiver (access point), in combination with multiple antennas, to optimally combine MIMO signals
to improve the client reception at long-range.
to improve the client reception at long-range.
Maximal Ratio Combining (MRC)
The guard interval is the time between OFDM symbols in the air. IEEE 802.11n gives the option for a shorter 400 nsec guard interval compared to
the legacy 800 nsec guard interval. Under ideal RF conditions this increases the throughput by upto 10%
the legacy 800 nsec guard interval. Under ideal RF conditions this increases the throughput by upto 10%
Short Guard Interval
WLAN operating modes
Infrastructure mode (autonomous operation or managed by LANCOM WLAN controller)
WLAN access point
Point-to-multipoint connection of up to 16 Ethernet LANs (mixed operation optional), broken link detection, blind mode, supports VLAN When
configuring Pt-to-Pt links, pre-configured names can be used as an alternative to MAC Adresses for creating a link. Rapid spanning-tree protocol
to support redundant routes in Ethernet networks
configuring Pt-to-Pt links, pre-configured names can be used as an alternative to MAC Adresses for creating a link. Rapid spanning-tree protocol
to support redundant routes in Ethernet networks
WLAN bridge
LANCOM L-322E Wireless
Features as of: LCOS 9.04