(MPRT) Mini packet receiver transmitter
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United States of America Patent
Stats
-
Jan 3, 1989
Grant Date -
N/A
app pub date -
Sep 16, 1986
filing date -
Sep 16, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The Mini Packet Receiver Transmitter Circuit (MPRT) provides an interface between one or two eight bit microprocessors and a digital subscriber loop interface circuit. The bi-directional communication on a single wire pair is accomplished by alternating the subscriber loop receive and transmit frames controlled by a 'Ping-Pong Protocol' using fixed frame format and bipolar alternate mark inversion (AMI) line encoding. There are two microprocessor ports within the MPRT, a transparent port for voice transmission and a non-transparent port for data trasmission. The MPRT implements the Mini Packet Protocol frame format as a mini packet (MP) of information, for both transparent and non-transparent data.
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