# US 2019/0379458 A1 · Optical transceiver having switchable modes corresponding to different data bandwidths > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0379458 A1 - Document ID: US20190379458A1 - Status: Published application - Kind: A1 - Application number: 16/551,310 - Filed: 2019-08-26 - Published: 2019-12-12 - Earliest claimed: 2017-07-31 - Assignees: Hewlett Packard Enterprise Development LP - Applicants: Hewlett Packard Enterprise Development LP - Inventors: Kevin B. Leigh; David Olson - Web page: https://patentgrep.com/patent/US20190379458A1 ## CPC - H04B 10/40: Transceivers - H04B 10/2581: Multimode transmission - H04J 14/0305: {in end terminals} - H04Q 11/0005: {Switch and router aspects} - H04Q 11/0062: {Network aspects} - H04Q 2011/0016: {using wavelength multiplexing or demultiplexing} - H04Q 2011/0075: {Wavelength grouping or hierarchical aspects} - H04B: TRANSMISSION - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) - H04Q: SELECTING (switches, relays, selectors H01H; wireless communication networks H04W) ## Abstract An optical transceiver includes electrical inputs that each correspond to a selected port of a number of network ports and a selected network lane of the selected port. The optical transceiver includes optical transmitters organized in groups to optically transmit data received at the inputs over a plurality of optical transmission fibers to which the groups correspond. The optical transceiver includes multiplexers corresponding to the transmission fibers. Each multiplexer is to wave-division multiplex the data transmitted by the transmitters within the group corresponding to the transmission fiber to which the multiplexer corresponds. The optical transceiver includes hardware logic to differently map the inputs to the transmitters according to a selected mode of a number of switchable modes corresponding to different data transmission bandwidths. ## Claims ### Claim 1 An optical transceiver comprising: a plurality of electrical inputs, each input corresponding to a selected port of a plurality of network ports and a selected network lane of the selected port; a plurality of optical transmitters organized in groups to optically transmit data received at the inputs over a plurality of optical transmission fibers to which the groups correspond; a plurality of multiplexers corresponding to the transmission fibers, each multiplexer to wave-division multiplex the data transmitted by the transmitters within the group corresponding to the transmission fiber to which the multiplexer corresponds; and hardware logic to differently map the inputs to the optical transmitters according to a selected mode of a plurality of switchable modes corresponding to different data transmission bandwidths. ### Claim 2 (depends on 1) The optical transceiver of claim 1, wherein the switchable modes comprise: a first switchable mode corresponding to a base data transmission bandwidth; and a second switchable mode corresponding to twice the base data transmission bandwidth. ### Claim 3 (depends on 2) The optical transceiver of claim 2, wherein the switchable modes further comprise: a third switchable mode corresponding to four times the base transmission bandwidth. ### Claim 4 (depends on 1) The optical transceiver of claim 1, wherein the groups in which the transmitters are organized are equal in number to the transmission fibers, and the multiplexers are equal in number to the transmission fibers. ### Claim 5 (depends on 1) The optical transceiver of claim 1, wherein the switchable modes comprise: a first switchable mode in which the inputs mapped to the transmitters include one lane of each port to realize a base data transmission; and a second switchable mode in which the inputs mapped to the transmitters include two lanes of each port to realize twice the base data transmission bandwidth. ### Claim 6 (depends on 5) The optical transceiver of claim 5, wherein the switchable modes comprise: a third switchable mode in which the inputs mapped to the transmitters include four lanes of each port to realize four times the base transmission bandwidth. ### Claim 7 (depends on 1) The optical transceiver of claim 1, wherein in each switchable mode, different inputs are mapped to each group of the transmitters. ### Claim 8 (depends on 1) The optical transceiver of claim 1, wherein to switch from a current selected mode to a new selected mode, the hardware logic remaps the inputs from the optical transmitters to which the inputs are mapped in the current selected mode to the optical transmitters to which the inputs are mapped in the new selected mode. ### Claim 9 A system comprising: an optical cable having a plurality of optical transmission fibers; a switch-side optical transceiver having a plurality of switch-side electrical inputs and a plurality of switch-side optical outputs corresponding to the optical transmission fibers over which a plurality of optical transmitters of the switch-side transceiver transmit wave-division multiplexed data, each switch-side input corresponding to a selected switch port of a plurality of network switch ports and a selected network switch lane of the selected switch port; and one or more server-side optical transceivers having a plurality of server-side electrical outputs and a plurality of server-side electrical inputs corresponding to the optical transmission fibers over which a plurality of optical receivers of the server-side transceiver receive the wave-division multiplexed data, each switch-side output corresponding to a selected server port of a plurality of network server ports and a selected network server lane of the selected server port, wherein the switch-side transceiver comprises switch-side hardware logic to differently map the switch-side inputs to the transmitters according to a selected mode of a plurality of switchable modes corresponding to different transmission bandwidths, and wherein each server-side transceiver comprises server-side hardware logic to differently map the server-side outputs to the receivers according to the selected mode. ### Claim 10 (depends on 9) The system of claim 9, wherein the switchable modes comprise: a first switchable mode corresponding to a base data transmission bandwidth; and a second switchable mode corresponding to twice the base data transmission bandwidth. ### Claim 11 (depends on 10) The system of claim 10, wherein the switchable modes further comprise: a third switchable mode corresponding to four times the base transmission bandwidth. ### Claim 12 (depends on 11) The system of claim 11, wherein in the third switchable mode: the switch-side hardware logic uses four switch lanes of each switch port in mapping the switch-side inputs to the transmitters, the server-side hardware logic uses four server lanes of each server port in mapping the server-side outputs to the receivers, the one or more switch-side transceivers include just one switch-side transceiver, and the optical cable comprises just one segment corresponding to the just one switch-side transceiver and including all the optical transmission fibers. ### Claim 13 (depends on 9) The system of claim 9, wherein in different of the switchable modes, the switch-side inputs are differently mapped to the transmitters, and the server-side outputs are differently mapped to the receivers. ### Claim 14 (depends on 9) The system of claim 9, wherein the server-side optical transceivers comprise just one server-side optical transceiver, and wherein the optical cable comprises: just one segment including all the optical transmission fibers; a switch-side connector to which the switch-side optical transceiver is communicatively connected; and a server-side connector to which the just one server-side optical transceiver communicatively is connected, wherein the one segment extends from the switch-side connector to the server-side connector. ### Claim 15 (depends on 9) The system of claim 9, wherein the server-side optical transceivers comprise more than one server-side optical transceiver, and wherein the optical cable comprises: a plurality of segments, each segment including just one optical transmission fiber; a switch-side connector to which the switch-side optical transceiver is communicatively connected; and a plurality of server-side connectors, each server-side optical transceiver communicatively connected to a corresponding server-side connector, wherein each segment extends from the switch-side connector to a corresponding server-side connector. ### Claim 16 (depends on 15) The system of claim 15, further comprising a plurality of optical straight cables, each optical straight cable comprising: a first end physically connected to a corresponding server-side connector of the optical cable; a second end communicatively connected to a corresponding server-side optical transceiver; and an optical transmission fiber. ### Claim 17 (depends on 15) The system of claim 15, wherein each server-side connector comprises: a first connector position connected to the optical transmission fiber of the segment to which the server-side connector is connected; and a second connector position not connected to any optical transmission fiber. ### Claim 18 (depends on 9) The system of claim 9, wherein the switch-side optical transceiver and the server-side optical transceiver automatically negotiate with one another the selected mode from the switchable modes, based on a number of servers connected to the server-side outputs and how the servers are connected to the server-side outputs. ### Claim 19 (depends on 9) The system of claim 9, wherein the switch-side optical transceiver and the server-side optical transceiver automatically negotiate with one another the selected mode from the switchable modes, based on a desired data transmission bandwidth. ### Claim 20 (depends on 9) The system of claim 9, wherein the switch-side optical transceiver and the server-side optical transceiver automatically negotiate with one another the selected mode from the switchable modes, based on how the optical cable interconnects the switch-side optical transceiver to the server-side optical transceivers.