Appeal No. 95-4636
Application 08/027,868
6. A data terminal for communications and
testing of subscriber equipment in a telephone
system of the type having a tip and ring connection,
comprising:
a microprocessor;
an EPROM interconnected with said microprocessor to
provide system storage;
dynamic random access memory interactively inter-
connected with said microprocessor and said
EPROM and containing resident MS DOS
operating system program;
an address buss interconnected between said micro-
processor, said EPROM and said dynamic
random access memory;
a data buss interconnected between said microprocessor,
said EPROM and said dynamic random access
memory;
a field programmable gate array receiving a
plurality of control signals,
address signals, data
signals and sensed
signals from around the
data terminal, and
providing a plurality of
gated output signals;
a universal asynchronous receiver-transmitter connected
to an 8-bit data buss that interconnects
with plural gated output digital data ports
from said field programmable gate array and
provides output of modem control signals;
telephone line input circuit providing connection to
the tip and ring connections of
said telephone line and
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