Intra-chassis protection systems and methods for passive optical network optical line terminals
AssigneeARRIS Enterprises LLC
InventorsThomas J. Cloonan, David B. Bowler
Life of this patent
Estimating the term…
Abstract
An optical line terminal is operable in a passive optical network. The optical line terminal includes a chassis. A plurality of optical subsystems are disposed within the chassis. Each optical subsystem is operable to generate optical signals for delivery to a port. Each optical subsystem includes one or more optical switches. When a fault condition is detected at a first optical subsystem preventing the delivery of first optical signals generated by the first optical subsystem to the port of the first optical subsystem, the optical switches switch to deliver second downstream optical signals generated by a second optical subsystem to the port of the first optical subsystem.
Claims12
An optical line terminal (OLT) operable in a passive optical network (PON), the optical line terminal comprising:
- a chassis;
- and
- a plurality of optical subsystems disposed within the chassis, each optical subsystem operable to generate optical signals for delivery to a port of the each optical subsystem and comprising one or more optical switches, wherein the plurality of optical subsystems comprises N optical subsystems arranged in a series from 1 to N;
- the one or more optical switches to, when a fault condition is detected at an Mth optical subsystem in the N optical subsystems, the one or more optical switches are configured to cause delivery of spare optical signals from a subsystem X in the N optical subsystems to an output port of the Mth optical subsystem and to cause remaining optical subsystems in the N optical subsystems to each deliver optical signals generated thereon to another optical subsystem other than the Mth optical subsystem, thereby selectively removing connection of the Mth optical subsystem from the remaining N optical subsystems, wherein M is less than N.
An optical line terminal, comprising:
- a chassis;
- N optical subsystems disposed within the chassis, the N optical subsystems each assigned a value from 1 to N in a series, and each optical subsystem of the N optical subsystems comprising:
- a phototransmitter to deliver optical signals to a port of the respective optical subsystem;
- and
- one or more optical switches;
- the one or more optical switches to, upon sensing a fault condition at a Mth optical subsystem in the N optical subsystems, switch to:
- deliver spare optical signals from a subsystem X in the N optical subsystems to an output port of the Mth optical subsystem;
- and
- cause remaining optical subsystems in the N optical subsystems to each deliver optical signals generated thereon to another optical subsystem other than the Mth optical subsystem, thereby selectively removing connection of the Mth optical subsystem from remaining ones of the N optical subsystem, wherein M is less than N.
Dependencies are inferred from the claim text.