DATA COMMUNICATION BYPASS APPARATUS

摘要

A low speed channel bypass appartus is described for reprovisioning the time slot multiplexer (52) associated with an add/drop multiplexer so as to insure that particular low speed channel(s) within a high speed channel are passed through the add/drop multiplexer via the time slot multiplexer (52) when the operation of an associated non-redudant network controller (56) is determined to be faulty. The low speed channels bypass apparatus is particularly directed for use with a high speed channel conforming to the synchronous optical network communication standard (SONET). A watchdog timer (46) is used to monitor the performance of the non-redudant network controller (56). The watchdog timer (46) when timed out not only associated reprovisioning appartus (50) to instruct the time slot multiplexer (52) to connect through selected channel(s) from the east high speed interface (26) to the west high speed interface (28).