Datasheet

WLAN
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.
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.
IEEE 802.11u
The effective distances and transmission rates that can be achieved are depending of the site RF conditions*) 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.
Client 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.
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.
Adaptive Noise Immunity
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.
MIMO
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%.
MAC Aggregation and Block
Acknowledgement
Coding method according to IEEE 802.11n. The Space Time Block Coding improves reception by coding the data stream in blocks.Space Time Block Coding (STBC)
Low Density Parity Check (LDPC) is an error correcting method. IEEE 802.11n uses convolution coding (CC) as standard error correcting method,
the usage of the more effective Low Density Parity Check (LDPC) is optional.
Low Density Parity Check (LDPC)
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.
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%
Short Guard Interval
WLAN operating modes
Infrastructure mode (autonomous operation or managed by LANCOM WLAN controller)WLAN access point
Use of the LAN connector for simultaneous DSL over LAN, IP router, NAT/Reverse NAT (IP masquerading) DHCP server, DHCP client, DHCP relay
server, DNS server, PPPoE client (incl.Multi-PPPoE), PPTP client and server, NetBIOS proxy, DynDNS client, NTP, port mapping, policy-based routing
based on routing tags, tagging based on firewall rules, dynamic routing with RIPv2, VRRP
WLAN router
Transparent WLAN client mode for wireless Ethernet extensions, e.g. connecting PCs or printers by Ethernet; up to 64 MAC addresses. Automatic
selection of a WLAN profile (max. 8) with individual access parameters depending on signal strength or priority
WLAN client
Wireless ePaper Displays
The device is equipped with a radio module for the update of LANCOM Wireless ePaper Displays in the 2.4 GHz frequency band.Support of LANCOM Wireless ePaper Displays
iBeacon
The device is equipped with a BLE radio module and can thus transmit a configurable iBeacon. The UUID as well as the major and minor ID are
configurable. On top of that, all three radiated powers are supported (near, immediate, far).
Support of iBeacon technology
Firewall
Incoming/Outgoing Traffic inspection based on connection information. Trigger for firewall rules depending on backup status, e.g. simplified rule
sets for low-bandwidth backup lines. Limitation of the number of sessions per remote site (ID)
Stateful inspection firewall
Check based on the header information of an IP packet (IP or MAC source/destination addresses; source/destination ports, DiffServ attribute);
remote-site dependant, direction dependant, bandwidth dependant
Packet filter
Network Address Translation (NAT) based on protocol and WAN address, i.e. to make internal webservers accessible from WANExtended port forwarding
N:N IP address mapping for translation of IP addresses or entire networksN:N IP address mapping
The firewall marks packets with routing tags, e.g. for policy-based routing; Source routing tags for the creation of independent firewall rules for
different ARF contexts
Tagging
LANCOM L-151E Wireless
Features as of: LCOS 9.04