Patent ID: 7274881
Filing Date: 2007-09-25
Classification: H04J,H04Q

Abstract:
1. A method of operating an optical line terminal (OLT), the method comprising: periodically sending a first message to a first optical device connected to an end of a single cable, the first message including a first identifier; determining whether the first optical device has failed to respond to the first message a predetermined number of times; sending a second message to the end of the single cable when the first optical device fails to respond the predetermined number of times, the second message having a second identifier that represents a second optical device, the second optical device being connected to the end of the single cable after the first optical device has been physically removed from the end of the single cable; determining if the second optical device has responded to the second message with the second identifier; and sending a third message with the first identifier that represents the first optical device when the second optical device fails to respond to a number of second messages.