Appeal No. 1998-1473 Page 3
Application No. 08/493,741
More specifically, the custodial nodes are first commanded to
perform their inverse operations so that the repaired link
again connects the custodial nodes. A path verification
process is next performed to ensure the integrity of the newly
repaired path. Once the integrity of the repaired path is
confirmed, each of the tandem nodes is commanded to perform
their inverse operations to disconnect cross-connected ports
within the tandem nodes.
Claim 1, which is representative for our purposes,
follows:
1. In a telecommunications network having a
plurality of nodes interconnected by a plurality of
working and spare links, after functionality of at
least one failed working link is restored by a
distributed restoration scheme, a method of
automatically reconfiguring said network to the
topology it had before said one working link failed,
comprising the steps of:
(a) identifying each of the nodes having
performed two cross-connect operations for rerouting
traffic traveling on a route including said one
failed working link to an alternate route as
custodial nodes bracketing said one failed working
link;
(b) identifying at least one node to which
respective connections via corresponding spare links
were made by said custodial nodes to establish said
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