Specifications

FibeAir 4800 Installation and Operation Manual Chapter 1 Introduction
FibeAir 4800 Installation and Operation Guide 1-3
authentication (preventing antispoofing and replay protection) with commercial
encryption, and complies with the IEEE 802.11i (phase iii) security
recommendations.
CCM/AES uses a symmetric 128-bit encryption key (EK), and a nonce, and
provides both message encryption and authenticating signature. The nonce
mechanism enables the receiver to remember already received genuine messages
and reject all replayed messages.
Initial encryption and authentication is based on a user-defined master key (Link
Password). While standard Wireless LAN encrypts only the Ethernet Payload,
FA4800 encrypts both the source and destination MAC addresses.
Management
FA4800 has full local and remote management capabilities. The user-friendly
SNMP-based management tool provides full end-to-end configuration, event log
and performance monitoring capabilities.
Diagnostics and Performance Monitoring
FA4800 supports activating local and remote loopbacks on E1/T1 links.
FA4800 constantly monitors the data transmission process, evaluates received
signal strength, and signal quality. It also monitors received traffic and frame rate
(FPS) for local and remote units.
Automatic Channel Select
Some versions of FA4800 have the Automatic Channel Select feature, which
operates via a Dynamic Frequency Selection (DFS) mechanism. This enables
coexistence with any radar system that may be active in the area. FA4800
performs channel monitoring and selects the channel with the lowest interference
for the transmission.
FA4800 operation complies with ETSI requirements where the ETSI version has
been purchased.
Adaptive Rate Modulation (ARA)
FA4800 changes modulation automatically depending on channel characteristics in
order to guarantee continuation of service. The adaptive modulation enables the
user to maximize Ethernet throughput without degradation of the TDM service
quality. When Ethernet only service is used, the adaptive modulation enables
improving the Ethernet performance in case of air performance degradation
(periodical interference or RSS changes).
In case of interference at one site, there is no need to use a lower modulation at
the other site (as in previous versions). In such a case the actual rate changes
automatically only at the problematic site, while the second side of the link
maintains the highest possible rate (Asymmetric).
Adaptive modulation can be selected in both Installation and Configuration
wizards.