B1) single pair 22-14awg unscreened
Flexible single pair data cables without electrical screening, Belden equivalent 8205, 8743, 8442, 9740, 8471.
B2) single pair 22-14awg overall foil screened
Flexible data cables with collective aluminum tape (CAT) screening. Belden equivalent 8451, 8719, 8720, 8760, 8761, 8762.
