Specifications

Installation and Operation Manual Chapter 1 Introduction
Airmux-200 Ver. 1.750 Overview 1-3
Initial encryption and authentication is based on a user-defined master key (Link
Password). While standard wireless LAN encrypts only the Ethernet payload,
Airmux-200 encrypts both the source and destination MAC addresses.
Management
Airmux-200 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.
Alternatively each site can be configured or monitored via a Telnet terminal.
Diagnostics and Performance Monitoring
Airmux-200 supports activating local and remote loopbacks on E1/T1 links.
Airmux-200 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 Airmux-200 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. Airmux-200
performs channel monitoring and selects the channel with the lowest
interference for the transmission. Airmux-200 operation complies with ETSI
requirements where the ETSI version has been purchased.
Adaptive Modulation
Airmux-200 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.
Transmit Power Control
The Transmit Power Control (TPC) function, provides the capability of defining the
transmit power in order to comply with the ETSI standard requirement of 30 dB
maximum. See
Table 4-1 for full details of transmit power control.
Alarm Connector
The IDU-E has eight external alarm inputs and outputs in the form of dry-contact
relays. The Alarm interface is located on the front panel of the IDU-E. The user
enables or disables each of the alarms and configures the text that appears in