Blowing Distances
‘Emtelle fibre in Emtelle tube’ is a combination that offers excellent blowing distances.
What do we mean by basic ‘blowing distance’?
It is the microduct length that can be blown in a single blow operation, without the use of range-extending methods.
Note that such a 'microduct length' may contain one or more connectors.
The fibre blows through these, as if the microduct is continuous.
For Access Networks, typical distances from the exchange to customer might be 1500m, 1000m or less. The shorter the distance, the smaller the tube may be.
Of course, for links longer than the basic blow distance, we use the range extending methods, which still preserve the 'unbroken' fibre length
Indicative Single Blow Distances (Emtelle fibre unit*)
(for routes having 'typical' bends and using air pressure 10bar / 15bar):
|
Fibre unit |
3mm m'duct |
5mm m'duct |
8mm m'duct |
|
2f & 4f |
300/500m |
1000/1400m |
1200/2000 |
|
8f |
- |
700/1000m |
1000/1500 |
|
12f |
- |
600/850m |
900/1300m |
Factors which permit greater blow distances:
· Smaller fibre product (lower weight)
· Larger microduct
· More air pressure, eg 13bar instead of 10bar
· Straighter route
· Downwards direction, eg down a building or hill rather than up.
· Improved fibre product/tube design*
*Emtelle improved designs have more than doubled possible blowing distances in recent years.
