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Glossary
Radio Control Board
One of the circuit boards plugged into the backplane, which provides the
interface between the controller and a radio transmitter and receiver
combination or any other audio signal source and destination, such as an IRLP
node or telephone interface.
Port
Generic term for one full duplex connection to the controller. This could be a
repeater, a link to another site, and IRLP node, or a remotely controller
transceiver (remote base).
Physical Port Number
The Radio Control board farthest to the left in the card cage, and next to the
CPU board is designated physical port number 0, the Radio Control board
immediately to the right of physical port number 1, and so on.
Logical Port Number
Users need to control the system by commanding specific ports, using the port
number. For example, the user may want to disconnect Link 1 at the San
Francisco Bay area Black Mountain site which links to another site at Crystal
Mountain. He would issue the Link 1 OFF command to do this. There may be
situations where the port number that a user associates with a particular link
cannot be the same as the physical port number. As a system grows, or if there
is a problem with the hardware for one of the links, it is undesirable to change
the logical port number for a link to some particular other site, but it may be
necessary to change the physical port number attached to that link. The
controller provides a logical to physical port mapping that can be used to
make the logical and physical port numbers different.
Repeater or Local Radio or Repeater Port
A port which is configured to operate as a repeater. Signals coming in on its
receiver will be repeated back out its transmitter.
Link or Link Radio or Link Port
A port which is configured to operate as a link. Signals coming in on its
receiver will not normally be repeated back out its transmitter, but only to
other ports which are connected (“linked”) to this port.
IRLP Port
A port which is configured to operate as a restricted link, normally used for
IRLP or other voice over IP connections into the site.
Remote Base Port
A port which is configured to operate a remotely controlled transceiver. It
invokes special telemetry, and is most commonly used in a simplex mode. The