All lengths are calculated estimates - without unwinding.
3 / 4.5 / 5 / 8 foot black, 9" / 2 / 6 / 9.5 / 12 foot grey
For phone, fax, modem, DSL etc.
standard "phone"
jack (RJ-11, 2C (means a pair of wires - supports one telephone or fax
line) 6P (indicates room for 6 wires if wanted to add 2 more pair), 12 foot cable is 4P (supports 2 lines)
Modular