PESA RCP-CSD, Manual

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RCP-CSD
50 Glossary
Port
Any of the serial communications bus interface connectors on the 3500Plus System Controller.
Port names are one to eight characters in length and are constructed using uppercase letters,
numbers, and spaces. The first character must be a letter. Port names are optional because a port is
identified by its address.
PRC Device
A device designed to be compatible with the PESA Routing Control (PRC) protocol.
The Ocelot, Cougar, Jaguar, and Tiger routing switcher families are PRC devices.
See also: RM5 Device.
Protect
A property placed on a destination that prevents all panels and ports from taking a switch on that
destination, unless taken from a panel or port that has the same requester code as the panel or port
that protected it.
Destination protection may be cleared by any panel or port that has the same requester code and
lock priority as the panel or port that protected the destination, that has a higher lock priority, or
that has a lock priority of 0 (zero).
See also: Lock, Lock Priority, Requester Code.
Protect Priority
See: Lock Priority.
Protocol
The format to be used when sending data between two devices.
Protocol names are one to eight characters in length and are constructed using uppercase letters,
numbers, and spaces. The first character must be a letter.
Readback
Information received from a routing switcher reporting which physical input is currently switched
to a specified physical output.
To ensure that the configuration in the controller, and the actual state of the physical switches in a
routing switcher agree, the routing switcher can be made to read back the status of each physical
output. Where the routing switcher reports a different physical input from that expected by the
controller, a readback error is declared.
Readback Error
See Readback.