Patent ID: 6816509
Filing Date: 2004-11-09
Classification: H04J

Abstract:
A digital information mapper for mapping input information characters into a SONET frame synchronous payload envelope (SPE) wherein said information characters comprise control and/or data information and each said character comprises 9 bits consisting of an 8 bit information octet, being either a control octet or a data octet, and one octet type bit identifying said octet as control or data, said mapper comprising:a processor; and a mapping module configured for performing a mapping algorithm, wherein said mapping algorithm is applied by said processor to sequences of eight said input information characters, said algorithm being operable to map said information octets of said sequences of information characters to eight of a sequence of nine contiguous SPE octets and to map said octet type bits for each said mapped sequence of information octets to the ninth octet of said contiguous SPE octets of said SPE octet sequence.