(MPRT) Mini packet receiver transmitter

Details (MPRT) Mini packet receiver transmitter (MPRT) Mini packet receiver transmitter

1986-09-16

1989-01-03

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 29, H04J 302

Patent

active

047962569

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.

REFERENCES:
patent: 4603236 (1986-07-01), Smith et al.
patent: 4627046 (1986-12-01), Bellamy
patent: 4635253 (1987-01-01), Urui et al.
patent: 4654640 (1987-03-01), Carll et al.

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