These abbreviations have been used to describe the 2468 difference in construction, as well the difference in impedance.. Since such acronyms are used 2469 in many commercial documents a
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2001-10-10
Annex E
2463
(informative) 2464
2465
Acronyms for balanced cables
2466
There is a great variety of cable constructions and a number of systems to describe these 2467
constructions in a shortened form These abbreviations have been used to describe the 2468
difference in construction, as well the difference in impedance Since such acronyms are used 2469
in many commercial documents and have never been clearly specified by a standard, the same 2470
term could mean different kinds of constructions in different context
2471
The intention of this annex is to clarify this situation and give guidance on how to use 2472
abbreviations for the main constructions used for communication cables This document uses 2473
the words balanced cable, unscreened/screened cable and unscreened/screened cable 2474
element for the cable constructions described in this annex
2475
To reduce confusion a more systematic naming is specified in Figure E 1 It is understood that 2476
cable names based on this schema only describe the types of constructions and not any 2477
transmission characteristics such as impedance All screened cables, whether individually or 2478
overall, foiled, braided or both, require matching connecting hardware capable of handling all of 2479
the screens involved
2480
Figure E 2 gives examples of cable constructions and their name based on this schema 2481
xx / xxx
| | |_ balanced element TP
| | element screen U = unscreened
| | F = foil screened
|
| _ overall screen _ F = foil screened
| S = braid screen
|_ SF =braid and foil screen
For example:
SF/UTP = overall braid and foil screened cable with unscreened balanced elements
S/FTP = overall braid screened cable with foil screened balanced elements
Figure E 1 - Cable naming Schema
2482
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2001-10-10
2483
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2500
2501
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2534
Figure E 2 - Cable Types
2535
NOTE - sometimes the letter P in the abbreviation is replaced by Q to characterise a quad construction.
2536
U/UTP:
Cable sheath Pair
Conductor
F/UTP:
Cable sheath Foil screen Pair Conductor
SF/UTP:
Cable sheath Braid screen Foil screen Pair Conductor
S/FTP:
Cable sheath Braid screen Foil pair screen Pair
Conductor
S/FTP:
Cable sheath Braid screen Foil quad screen Quad
Pair Conductor
U/FTP:
Cable sheath Foil pair screen Pair
Conductor
U/FTP:
Cable sheath Foil quad screen Quad
Pair Conductor
U/UTP:
Cable sheath Quad
Pair Conductor