without any service interruption this is handled via the fault analysis sw running on the nsp both lan sides lan 0 and lan 1 are active but each carries half the traffic using standard line trunk group ltg message channel distribution i e each task has a different default active standby side if a lan failure occurs the switchover causes the remaining lan to carry the full traffic load according to another embodiment of the present invention the mcps supports redundancy by distributing mct 39 s in such a way that each task has a partner which runs on a different mcp that means that the failure of a single mct results in its functionality being taken over by the u201c partner u201d board ultimately this says that the failure of an mcp board results in the switchover of each mct being carried by that board the signal system network control ssnc redundancy is realized with each unit e g mpu having a redundant partner for example the mp 39 s include two mpu 39 s which run micro synchronously the ssnc is used to perform the signaling gateway functionality the ssnc is a multi processor system with its own maintenance devices disks and optical devices it is preferably u201c loosely.