公开(公告)号：CA985424A

公开(公告)日：1976-03-09

申请号：CA159299

申请日：1972-12-18

Applicant: IBM

Inventor： BELL NOEL J ,  COOPER RONALD J ,  NAGLE FREDERICK P ,  NEWLIN FRANK A III ,  STADLER WILLIAM M

IPC: H03M7/02 ,  G06F5/00 ,  G06F13/00 ,  H03M5/00 ,  H04L13/06 ,  H04L17/30

Abstract: The described apparatus is interposed between the modem or line adapter of a synchronous transmission line and the data processor and will identify for the processor, the code in which data is being received. The discriminator is particularly useful in a system where any one of a number of data terminals using different transmission codes can be connected to one of the ports of the processor. In use, the discriminator examines, at each bit time, the last grouping of bits it has received to detect the presence of a code identifying character. When it detects one such character, the system waits until another character is received to determine if the second character is consistent with the tentatively identified code. If not, the system resets to continue looking for a new identification character. The system continues hunting until a transmission code is fully identified. The discriminator then notifies the processor of the code in which the data is being received.