Inventors:
Holger Opderbeck - Herndon VA
Gulay Sencer - Red Bank NJ
William N. Carr - Newark NJ
Steven J. Byars - Chantilly VA
Assignee:
GTE Communication Systems Corporation - Phoenix AZ
International Classification:
H04J 302
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.