A network device may include multiple line cards and a switch fabric assembly electrically connected to the line cards. The switch fabric assembly includes: for each of the line cards, a line card connector providing electrical connectivity between the line card and one or more cables; a cable mesh assembly including the cables, the cables providing electrical connectivity between each line card connector and multiple switch connector groups; and multiple switch application specific integrated circuits (ASICs), each of the switch ASICs being electrically connected to one of the switch connector groups.

A network device may include multiple line cards and a switch fabric assembly electrically connected to the line cards. The switch fabric assembly includes: for each of the line cards, a line card connector providing electrical connectivity between the line card and one or more cables; a cable mesh assembly including the cables, the cables providing electrical connectivity between each line card connector and multiple switch connector groups; and multiple switch application specific integrated circuits (ASICs), each of the switch ASICs being electrically connected to one of the switch connector groups.

Data center rack systems are described. A data center rack system can include a rack having switches. A removable chassis can include an arrangement of interconnect such that a topology for a switch network can be implemented when the removable chassis is coupled with the switches.

Data center rack systems are described. A data center rack system can include a rack having switches. A removable chassis can include an arrangement of interconnect such that a topology for a switch network can be implemented when the removable chassis is coupled with the switches.

Aspects and techniques of the present disclosure relate to a fiber optic communications network that includes a loop back connector in conjunction with one or more distribution devices daisy chained together to index optical fibers within the network. The network includes a central office that sends signals in one direction. The loop back connector can be mounted at the end of the chain to allow un-used live indexing optical fibers corresponding to active fiber positions to be looped back to feed signals to dead indexing optical fibers corresponding to inactive fiber positions. The dead indexing optical fibers can be optically connected to progressively dropped fibers or reverse ports in the indexed network.

Data center rack systems are described. A data center rack system can include a rack having switches. A removable chassis can include an arrangement of interconnect such that a topology for a switch network can be implemented when the removable chassis is coupled with the switches.

Data center rack systems are described. A data center rack system can include a rack having switches. A removable chassis can include an arrangement of interconnect such that a topology for a switch network can be implemented when the removable chassis is coupled with the switches.

The teachings of the present disclosure relate to bus systems. Various embodiments thereof may include bus coupling units, for example a bus coupler comprising: four ports comprising input/output connections to which bus cables of a two-wire bus are connectable, wherein both electrical energy and data are transmissible via both bus cables. The first port and second port are bus coupler-internally electrically conductively connectable by means of a first connection path. The third port and fourth port are bus coupler-internally electrically conductively connectable by means of a second connection path. The first connection path and second connection path are bus coupler-internally electrically conductively connectable by a bridge path.