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US 7,035,294 B2Granted
Backplane bus
AssigneeCalix Networks, Inc.
InventorsJason Dove, Brian Semple, Andre Tanguay
Life of this patent
Estimating the term…
Abstract
A point-to-point system for connecting a line card to a switching card using a transmission rate measured in gigabits per second.
Claims37
A method of transmitting traffic from a line card to a switching card comprising:
- receiving traffic in at least one line card;
- directing the traffic to an outgoing port of the line card;
- organizing the traffic into a 6 millisecond superframe;
- allocating the traffic among a plurality of channels in the 6 millisecond superframe wherein the 6 millisecond superframe operates at a fixed line rate of about 3.1104 Gbps;
- transmitting the traffic from the at least one line card to a switching card.
2 more elements
A method of transmitting a signal encoded with a message of fixed size from a line card to a switching card comprising:
- receiving serial traffic in a line card;
- directing the traffic to an outgoing port of the line card;
- converting the traffic from serial to parallel;
- organizing the parallel traffic into a 6 millisecond superframe;
- allocating the parallel traffic among a plurality of channels in the 6 millisecond superframe;
- converting the traffic from parallel to serial;
- and
- transmitting the serial traffic from the line card to a switching card.
5 more elements
A system comprising:
- a plurality of line units;
- and
- a switch for connecting traffic coming from a plurality of outgoing ports on the plurality of line units to a plurality of incoming ports on the plurality of line units;
- and
- a bus carrying at least one 6 millisecond superframe transporting data between at least one line unit of the first plurality and the switch.
2 more elements
A bus based on a 6 millisecond superframe, comprising:
- packetized traffic;
- and
- frame traffic wherein the bus operates at a fixed line rate of 3.1104 Gbps.
A shelf comprising:
- a plurality of line units selected from the group consisting of POTS, DS1, SONET, POTS/DSL;
- a switch for directing traffic to an intended destination;
- and
- a plurality of 6 millisecond superframes wherein there is at least one 6 millisecond superframe between each line unit in the plurality of line units and the switch.
1 more element
A method of transmitting traffic from a line card to a switching card comprising:
- transmitting traffic in a plurality of 125 microsecond frames in the 6 millisecond superframe, wherein the 6 millisecond superframe operates at a fixed line rate of about 3.1104 Gbps, each frame having a number of overhead bytes, including an overhead byte used to denote a state of configuration, and another overhead byte that monotonically changes across frames;
- and
- rebooting said line card when said monotonically changing byte reaches a predetermined limit after an active reset signal is received.
Dependencies are inferred from the claim text.