User Manual DEV 1951
14 Copyright DEV Systemtechnik GmbH 2004-2017
3.1.3 Autonomous Switching and Options
Among the broad choice of other switch modules, the DEV 1951 can be equipped
with one or two sensing switch modules or with one or two digital signal switch
modules; a mix of both types of switch modules is supported as well.
The sensing switch modules (and the digital signal switch modules) are special since
they permit the device to switch autonomously (please refer to chapter 5.1.3)
based on the RF level information (and on the digital signal quality information,
respectively) at both input ports of the module.
By default, the DEV 1951 provides autonomous switching capability from the
primary to the secondary input port(s).
With Option 22, the DEV 1951 is delivered with the main backup swap feature, i.e.
the autonomous switching works in both directions instead of switching from the
primary to the secondary input port(s), only.
With Option 28 the DEV 1951 is delivered with the automatic switch back feature
which permits the autonomous switching in both directions as well, but with an
adjustable hysteresis (for sensing switch modules) or with an adjustable delay (for
digital signal switch modules) when switching back from the secondary to the
primary input port(s).
The Web Interface enables the adjustment of the RF threshold levels for each input
port of a sensing switch module and enables the modification of settings for the
automatic switch back option.
3.1.4 TRAC Option
The product can be equipped with the TRAC (stands for Trap Receiver Action
Controller) option (Option 37), which permits the remote controlled switching of
the product based on SNMP traps, or based on the availability or on the absence of
a remote device (IP Monitoring). For more details, please refer to chapter 5.5.7.3.4.
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