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Control interface protocol for telephone sets for a satellite telephone system

  • US 7,995,460 B2
  • Filed: 04/20/2004
  • Issued: 08/09/2011
  • Est. Priority Date: 11/30/1998
  • Status: Expired due to Fees
First Claim
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1. In a communication system having a plurality of terminals connected to a common node by a digital interface bus, a method for handling error control for packets sent to the terminals by the common node, each packet having modulo-sequential sequence numbers, comprising the steps of:

  • sending a packet from the common node to one of the terminals;

    performing collision checking on the bus; and

    sending a negative acknowledgment (NAK) from said one of the terminals to the common node when an error or unexpected sequence number is detected in said packet, wherein said NAK includes a sequence number of a last valid packet received.

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