H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 12/24 (2006.01) H04L 12/56 (2006.01) H04M 11/06 (2006.01)
Patent
CA 2283611
An apparatus for handling back-to-back maintenance messages in extended superframe t1 telephone circuits includes a FIFO, a byte counter, and a message length register. According to a method of the invention, when messages are placed in the FIFO, the byte counter counts the message length and places the message length in the message length register. A host controller is required to read the message length register in the time interval following complete receipt of a first message before complete receipt of a second message, but is only required to read the contents of the FIFO before it overflows. According to a presently preferred embodiment of the apparatus, a second register is provided for indicating the current depth of the FIFO. The second register sends an interrupt to the host controller when the contents of the FIFO exceed a threshold.
Bartholomay William G.
Bhattacharya Santanu
Varthanan Balaraj Vishnu
Yadav Pushkal
Smart & Biggar
Transwitch Corporation
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