Method and system for redundancy in a passive optical network

摘要

The present invention is related to redundancy within a passive optical network and may include a first optical line terminal (OLT), a second optical line terminal, a first optical networking terminal (ONT) including an optical port and at least one Ethernet port; and a first two-to-many passive optical splitter. In operation, the first ONT may be registered with the first OLT and the second OLT may have the transmit function of the first optical port turned off. The receive function of the first optical port on the second OLT may be turned on and may be listening to the communication between the first OLT and the first ONT. When the second OLT no longer receives a signal indicating that the first OLT is still registered with the first ONT, the second OLT may turn on the receive function of the first optical port and registers with the first ONT.

主权项

1. A passive optical networking (PON) system comprising:
a first optical line terminal (OLT) including
at least one Ethernet port;a first optical port having a transmit function and a receive function; a second optical line terminal including
at least one Ethernet port;a first optical port having a transmit function and a receive function; a first optical networking terminal (ONT) including an optical port and at least one Ethernet port; a first passive optical splitter including:
a first optical input optically coupled to the first optical port of the first OLT;a second optical input optically coupled to the first optical port of the second OLT; anda plurality of optical outputs, wherein a first optical output is optically coupled to the optical port of the first ONT; andwherein the first OLT cannot directly communicate with the second OLT through the first passive optical splitter; wherein the first ONT is registered with the first OLT and the second OLT has the transmit function of the first optical port turned off, but the receive function turned on and is listening to the communication from the first ONT to the first OLT; and when the second OLT no longer receives a signal indicating that the first OLT is still registered with the first ONT, the second OLT turns on the receive function of the first optical port and registers with the first ONT to allow the flow of traffic from the first ONT to the second OLT.