Extended automatic protection switching arrangement
View Patent ↗An automatic protection arrangement for a communication system ( 100 ) provides a working line terminal equipment ( 300 and a link ( 1 A) for transmitting bearer traffic from a number of bearer payload processors ( 50 -N) to a switching center ( 10 ). The arrangement also has a protection line terminal equipment ( 35 ) and link ( 2 A) coupled to the switching center ( 10 ). For detected faults, an instantaneous switch over occurs of the bearer traffic of the bearer payload processors ( 50 -N) from the working line terminal equipment ( 30 ) to the protection line terminal equipment ( 35 ).
1. An automatic protection method for a communication system having a switching center coupled to line equipment, the automatic protection method comprising the steps of:
providing a working link for transmitting bearer traffic between the switching center and a first line terminal equipment;
providing a protection link for selectively transmitting bearer traffic between the switching center and a second line terminal equipment;
receiving by the first and second line terminal equipment bearer traffic from a plurality of bearer payload processors;
monitoring by the first and second line terminal equipment each of the plurality of bearer payload processors for failures;
obtaining by the second line terminal equipment a failure indication for each of the plurality of bearer payload processors;
determining whether there is a predetermined number or greater of failures among the plurality of bearer payload processors, wherein if a number of failures of the plurality of bearer payload processors is greater than or equal to the predetermined number, there is further included a step of switching the bearer traffic from the working link to the protection link, wherein if the number of failures of the plurality of bearer payload processors is less than the predetermined number, there is further included steps of:
removing faulty bearer payload processors from service; and
maintaining operation of non-faulty bearer payload processor on the working link.