Patent ID: 6222854
Filing Date: 2001-04-24
Classification: H04L

Abstract:
A method for monitoring a link connection within a sublayer of a node connected to a network, the method comprising the following steps:(a) entering an evaluate link state and starting an idle timer;(b) in the evaluate link state, if a carrier event is detected before expiration of the idle timer, entering an evaluate carrier state;(c) in the evaluate carrier state, starting a valid carrier timer;(d) in the evaluate carrier state, if a status error is detected or if the carrier event completes before expiration of the valid carrier timer, entering an increment criteria state;(e) in the increment criteria state, incrementing a false carrier count; and,(f) in the increment criteria state, if the false carrier count, after being incremented, is equal to a false carrier count limit, entering a link down state.