The transceiver form factor will be different as speeds increase. In Table2, we see that different data transmission schemes in the left most column are supported by various form factors. The form factors, themselves, are spelled out by industry Multi Source Agreements(MSA’s). When reviewing the table, it is apparent that…
STRUCTURED OR NOT for Data Center
The broad advantages of structured cabling over point to point cabling (such as that used on top of rack configurations in a data center) are seen as:
- improved energy efficiency
- increased switch port utilization
- quicker system adaption
- greater scalability
- easier network expansion
- less maintenance and administration
- less expensive switches
- overall lower cost of ownership.
Disadvantages cited include the fact that more cables and racks are needed leading to higher cross-connect copper cabling costs, lower suitability for high-density blade servers and length restrictions on cross-connect copper cabling.
The structured cabling system can make a network easier to manage and make it easier also to identify and deal with specific points of failure. It divides up the network into manageable blocks and works on a defined hierarchy of management. The data center is divided into distribution cabling sub-systems – main, intermediate and local. The main distribution cabling sub-system will house the main cross-connects and the core networking equipment. Intermediate sub-systems will house the cross-connect to the equipment areas. Industry consensus suggests a structured cabling system makes additions and modifications easier to achieve and allows for flexibility in connections.
The deployment of data center modules is increasingly common as a means of building data centers based on the principle that it is more cost effective to construct and fit out a data center as demand grows. The nature of ‘structured’ cabling and the use of standards and specifications agreed between suppliers and industry associations have to some extent already created a modularity within network and cabling systems, which means they can be connected and upgraded as the requirement for the network changes. Cabling systems now take the form of modular plug-in/snap-in systems where the cabling may have been pre-terminated and pre-tested before leaving the factory.