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The DDA-4320 is an ASI / SDI / STM-1 data distribution amplifier that incorporates a protection switching facility for switching five outputs to a standby module when a fault is detected.
To facilitate this mode of operation, the
ZDA-4320RH provides all of the required signal and
logic interconnections between two modules.
The individual module alarms are also provided for
remote monitoring purposes.
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Three switched outputs are provided at the rear of the
module with two additional outputs for monitoring
purposes on each module. The primary output is
controlled by relays to provide a bypass signal from
the input during a power failure.
Changeover-inhibit and changeover-request switches
are provided on the front panel for local manual
control. |
