The BAL-8 is a 1RU interface containing eight
4-pair, transformer-isolated ports. Each port handles two audio signals and two
RS-422 data lines. The unit isolates the connection between Matrix Plus 3 ports
and peripheral devices such as two-way radios.
Each set of input/output connectors has its own slide switch, allowing the port
to be placed into Normal or Interface mode. In normal mode, the data pairs are
unaffected, while in interface mode they are connected to indicate to the system
software that a direct connection is being made. Each channel has a pair of
RJ-45 connectors for input and output.