An old, but still-used designation for a twisted-pair cable with foil shield. However, the designation does not specify whether the shield type refers to individual pairs or the cable as a whole.
New and more precise designations are set forth in the ISO/IEC 11801 (2002) E standard and take the form of XX/YZZ, as follows:
XX indicates the overall shield
Y indicates the shielding of the individual pairs
ZZ is the twisting type
Example: An F/STP cable is a Foiled Shielded Twisted Pair (foil shield for overall cable and braided shield for pairs).
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