We have adopted a series of connectivity reference models including large Co-Location (Green Field), large Co-Location (Brown Field), Hyperscale and Large Enterprise/Multi-Hall scenarios. These models include campus or cluster cabling, internal Data Center trunk cabling and connections from cable entry all the way to the customer space or edge network equipment.

In this example, we look at the large Co-Location (Green Field) reference model, adopting a simplified version of the standards.


In our large Co-Location (Green Field) Reference Model, three Co-Location Data Centers are located within a campus and connected with two or more diversely routed cables.

Cables run in ducts from External Network Interface (ENI) rooms to other ENI rooms, with fiber counts often in excess of 1000 and link lengths running from 100 meters to several kilometers.



In our Co-Location reference model, the network design adopted, provides maximum flexibility of connectivity between all spaces within the data center building and also to the other data centers on the campus. The design can be split into two discreet sections – the backbone and the horizontal cabling.


In the horizontal cabling, all of the equipment racks are cabled back to the Main Distribution frames using medium fiber count cables.



In the backbone cabling all of the MDs on the campus are interconnected, using very high fiber count cables. This allows a client in any space on the campus to be connected to a service provider located anywhere on the campus, scaling the campus into a single Hyperscale space.




The MD connections to the ENI, to the other MD within the data hall and to the other MDs within the data center building are often referred to as the data center backbone. These are typically linked with high density cable of 144 fibers to 864. Due to the routing of the high fiber cables through walls and between floors, routes are usually run as bare cable and fusion spliced at the termination points. Alternatively, they can be installed as single end pre-terminated cable , with the free end, pulled (or blown) from the source to the destination.