(n) (comp) subscriber line
(n) (comp) public network
(n) (comp) single-wire line
(n) (comp) physical line
physical circuit
(n) (comp) access line
(n) (comp) analog line (circuit)
(n) (comp) digital line
(n) (comp) communications line resale
(n) (comp) DCE
Data Circuit Termination Equipment
Digital Service Unit
line terminating equipment
DSU
LTE
(n) line discipline
(n) (comp) line switching
(n) (comp) line utilization rate
(n) (comp) data transmission circuit
(n) (comp) digital line
(n) (comp) metallic line
metallic circuit
(n) (comp) tandem data circuit
(n) (comp) data circuit transparency
(n) (comp) data circuit-terminating equipment
DCE
(n) (comp) line interface
(n) (comp) line interface module