Twisted Pairs: Stranded tin-coated copper conductor, cross-linked polyethylene insulation, one black and one white conductor cabled to form a pair. Optional binder tape, tin-coated copper braided shield, shield insulation of two sealed polyester tapes. Standard Identification Code by Method 2.

Groups of 7: Stranded tin-coated copper conductor, ethylene propylene rubber or cross-linked polyethylene insulation, 5 black and 2 white conductors cabled to form a group of 7, two sealed polyester tapes, Standard Identification Code by Method 2.

Assembly: Five shielded pairs cabled to form a core. 3 pairs and 8 groups of seven cabled over the core, fillers, binder tape, cross-linked polyolefin jacket, surface marking. LSECMA: same, braided aluminum armor, paint.