Small is beautiful

“We stole from other technologies to create a new one”   

   Small is beautiful

 
 

Small is beautiful

Small is beautiful

Small is beautiful

 


  

Tight squeeze

Today’s datacenters are increasingly stuffed with cables. To meet the demand for capacity, compactness and flexibility, Fumay patented a multi-pair Cat 6A backbone cable which fits into tight corners, and reduces crosstalk. 

 

Time saver

To install 24 pairs, you usually had to pull 6 cables (4 pairs each) which is time-consuming and results in over-filled cable trays. Here, only one smaller cable is installed. It is contained in a Low Fire Hazard halogen-free, flame-retardant (HFFR) jacket.

 

Cross Wise

The patent originated with the R&D team in Fumay. Their first improvement was to make cables with bundles of four pairs each without individual jackets. This reduced size and weight, but meant that installers still had to remove individual foil screens around each pair one by one. The second improvement was to replace individual screened pairs by a metal cross separator which could house one pair in each of the four sections. This meant that the installer had only to cut one cross instead of four individual foil screens (see illustration). We adapted this cross-solution from our previous LAN cables.

 

Refined assembly

The assembling process generates mechanical distortions (and thus impedance variations) on the pairs. For a normal cabling process with constant lay length, variations are periodic and may cause problems in data transmission. Either we reduce lay length so that the problem occurs at frequencies higher than used by the application, or we use a variable/random lay. The first results in low machine output, whereas the second triples output. We chose the latter solution. Datacenters represent 15–20% of global LAN cable business. These cables were installed in a customer's datacenter, and soon for a second one.