Specifications

Chapter 1 Introduction Installation and Operation Manual
1-4 Overview Airmux-200 Ver. 1.750
the alarm trap. The ODU sends the alarm within less than a second from actual
alarm trigger.
The alarm connector is available as an ordering option for the IDU.
Link Compatibility
Airmux-200 indicates the version compatibility via software traps. As new
hardware is added to existing networks compatibility issues may arise. Trap
messages indicate the problem and suggest upgrades as appropriate.
Optional External Antenna
Airmux-200 supports configuration of an external antenna. In this configuration,
the outdoor unit is supplied with an N-type connector that connects through a
coax cable to the external antenna.
An external antenna can extend the range of the link, and in some cases, may
help to reduce environmental interferences. Various external antennas are
available for the Airmux-200 operating frequencies.
For example, an optional flat panel 28 dBi external antenna increases the
operation range of Airmux-200 up to 80 km (50 miles).
Hub Site Synchronization
When several Airmux-200 units are collocated at a common hub site interference
may occur from one unit to another. Airmux-200 ODU units are supplied with
special hardware for the collocation of up to eight units.
Using a method called Hub Site Synchronization (HSS) an external cable is
connected to all collocated Airmux-200 ODUs, this cable carries pulses sent to
each ODU, which synchronize their transmission with each other. (See
Appendix F
for more details).
E1 Trunk Redundancy
IDU-R units have a secondary E1 input which may be connected to external
equipment other than the ODU. This provides backup in the event of failure of
either the air interface link of the Airmux-200, or the secondary E1 link.
The user configures which of the two links is the main link and which is the
backup link.
VLAN Management
VLAN management allows the separation of user traffic from NMS traffic. The
user decides if such a separation is required. Both the headquarters and remote
sites are configured with VLAN management.