Added main line apparatus

A ring cadence replicator for use in a system for providing at least two telephone lines over a single pair of conductors between a central office and a customer, the ring cadence replicator comprising central office apparatus and customer apparatus, said central office apparatus and customer apparatus disposed for connection by the single pair of conductors;

• the central office apparatus comprising:
• first and second ring detection means coupled to respective first and second central office telephone lines each of the first and second ring detection means providing respective first and second ring-detect signals;
• and
• encoding means for converting events of the transitions of the first and second ring-detect signals to digital messages and for coupling said digital messages to the single pair of conductors;
• the customer apparatus comprising:
• decoding means for converting said digital messages to first and second ring-enable signals corresponding temporally to the first and second ring-detect signals;
• ring generator means for generating ring voltage;
• and
• switching means for selectively coupling the ring voltage to first and second customer telephone lines corresponding to the first and second central office lines, said switching means coupling and uncoupling the ring voltage to the said first and second central office lines in response to corresponding ones of the first and second ring enable signals;
• whereby the ringing cadence, if any, present at the first and second central office lines is replicated at the corresponding customer telephone line.

Central office apparatus for use in a ring cadence replicator in a system for providing at least two telephone lines over a single pair of conductors between a central office and a customer, the ring cadence replicator comprising central office apparatus and customer apparatus, said central office apparatus and customer apparatus disposed for connection by the single pair of conductors;

• the customer apparatus comprising decoding means for converting digital messages to first and second ring-enable signals;
• ring generator means for generating ring voltage;
• and switching means for selectively coupling the ring voltage to first and second customer telephone lines corresponding to first and second central office lines, said switching means coupling and uncoupling the ring voltage to the said first and second central office lines in response to corresponding ones of the first and second ring enable signals;
• the central office apparatus comprising:
• first and second ring detection means coupled to the first and second central office telephone lines, each of the first and second ring detection means providing the first and second ring-detect signals;
• and
• encoding means for converting events of the transitions of the first and second ring-detect signals to the digital messages and for coupling said digital messages to the single pair of conductors;
• whereby the ringing cadence, if any, present at the first and second central office lines is replicated at the corresponding customer telephone line.

Customer apparatus for use in a ring cadence replicator in a system for providing at least two telephone lines over a single pair of conductors between a central office and a customer, the ring cadence replicator comprising central office apparatus and customer apparatus, said central office apparatus and customer apparatus disposed for connection by the single pair of conductors;

• said the central office apparatus comprising first and second ring detection means coupled to respective first and second central office telephone lines, each of the first and second ring detection means providing respective first and second ring-detect signals;
• and encoding means for converting events of the transitions of the first and second ring-detect signals to digital messages and for coupling said digital messages to the single pair of conductors;
• the customer apparatus comprising:
• decoding means for converting said digital messages to first and second ring-enable signals corresponding temporally to the first and second ring-detect signals;
• ring generator means for generating ring voltage;
• and
• switching means for selectively coupling the ring voltage to first and second customer telephone lines corresponding to the first and second central office lines, said switching means coupling and uncoupling the ring voltage to the said first and second central office lines in response to corresponding ones of the first and second ring enable signals;
• whereby the ringing cadence, if any, present at the first and second central office lines is replicated at the corresponding customer telephone line.