Frame relay system capable of handling both voice and data frames
First Claim
1. A frame relay communication system capable of transmitting both digital data frames and voice frames, said system comprising a plurality of nodes interconnected by communication links, at least one of said nodes including:
- means for receiving a frame on an oncoming link;
means for detecting whether said frame is a digital data frame or a voice frame;
means responsive where said frame has been identified as a voice frame to perform an error checking operation only on a first set of fields of the frame, said first set of fields excluding data fields, said means being responsive to said frame having been identified as a data frame to perform an error checking operation on a second set of fields, said second set of fields including data fields.
1 Assignment
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Accused Products
Abstract
Modifications to existing frame relay communication protocols are described which permit both voice and data frames to be handled in an integrated frame relay system. A Voice Frame Identifier bit is defined in the address field of a frame. When an intermediate node detects a voice frame, a CRC operation is performed using only the frame header; that is, voice information is excluded from the computation. The frame is flagged for priority processing in the node. When the intermediate node detects a data frame the CRC operation uses both the header and the data fields.
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Citations
4 Claims
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1. A frame relay communication system capable of transmitting both digital data frames and voice frames, said system comprising a plurality of nodes interconnected by communication links, at least one of said nodes including:
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means for receiving a frame on an oncoming link; means for detecting whether said frame is a digital data frame or a voice frame; means responsive where said frame has been identified as a voice frame to perform an error checking operation only on a first set of fields of the frame, said first set of fields excluding data fields, said means being responsive to said frame having been identified as a data frame to perform an error checking operation on a second set of fields, said second set of fields including data fields. - View Dependent Claims (2)
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3. In a frame relay communication system comprising a plurality of nodes interconnected by communication links, a method of processing both digital data frames and voice frames in at least one node comprising the steps of:
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receiving a frame from an incoming link; identifying the frame as a voice frame or a data frame; if the frame is a voice frame, performing an error check only on a first set of fields in the frame, said first set of fields excluding data fields; and if the frame is a data frame, performing an error check on a second set of fields in the frame, said second set of fields including data fields. - View Dependent Claims (4)
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Specification