Terms that are related to structured cabling in data centers – Part 1
It is a metal structure used to form L,T,X or Y shaped intersections quickly without cutting or bending trays.
This equipment is used to give curves to cables at the intersection.
Network Patch Cable
It is an electrical or optical cable that is used to connect two electrical/electronic devices can be connected using patch cables.
It is a category of cable that forms a part of structured cabling for networks. It can carry many other signals such as basic voice services and token ring. It is an enhanced version of Cat5 that adds specification for far end crosstalk.
Attenuation Crosstalk Ratio (ACR)
The difference between attenuation and crosstalk measured in dB, at a given frequency. A quality factor for cabling to assure that signal sent down a twisted pair is stronger at the receiving end of the cable than any interference imposed on the same pair by crosstalk from other pairs. DAS Dual Attachment Station. Term used with FDDI networks to denote a station that attaches to both the primary and secondary rings.
Graded Index Fiber
A multimode fiber optic cable design in which the index of refraction of the core is lower toward the outside of the core and progressively increases towards the center of the core, thereby reducing modal dispersion of the signal.
The slight movement of a transmission signal in time or phase that can introduce errors and loss of synchronization. More jitter will be encountered with longer cables, cables with higher attenuation, and signals at higher data rates. Also, called phase jitter, timing distortion, or intersymbol interference.
A path that the structured cabling takes from the data room to workstations. This path can be horizontal, vertical and backbone pathway. The path of the cable is supported through steel structures to form a continuous pathway for cables. 90 degree L and T-shaped intersections can be created using these metal structures.
It is lighter thinner and more flexible cable used for transmission purposes. A flat cable includes a signal line extending in longitudinal direction, a thin dielectric sheet with which the signal line is coated and that has plasticity a pair of spaced apart group layers extending in the longitudinal direction and sandwiching the dielectric sheet in its thickness direction and insulators that coat the pair of ground layers so that they are not exposed to the outside.
Backbone cabling are multi-stranded fibre or multipair copper cables. Telecommunication enclosures and data centers are connected by backbone cables to the main cross connect.
A Closet is an enclosed space for housing telecommunications and networking equipment, cable terminations, and cross-connect. It contains the horizontal cross connect where the backbone able cross-connects with the horizontal cable.
It is a method of cabling that can be implemented in open office areas with high churn or the data center. The objective of zone cabling is to reduce the amount of cabling disturbed incase the user shifts the workplace. Zone enclosures add flexibility to the network by providing a secure space for consolidation points, active cross connets and wireless access points. Zone enclosures can be used to reduce downtime when work spaces are reconfigured.
Terms that are related to structured cabling in data centers – Part 2