Digital Signal Level 0 (DS-0) means the lowest-level signal in the time division multiplex digital hierarchy, and represents a voice-grade channel operating at either the 56 Kbps or 64 Kbps transmission bit rates. There are twenty-four (24) DS-0 channels in a DS-1.
Day-ahead Settlement Interval means the interval used by settlements, which shall be every one clock hour.
Network Termination Point means the physical point at which a Subscriber is provided with access to a Public Electronic Communications Network and, where it concerns Electronic Communications Networks involving switching or routing, that physical point is identified by means of a specific network address, which may be linked to the Telephone Number or name of a Subscriber. A Network Termination Point provided at a fixed position on Served Premises shall be within an item of Network Termination and Testing Apparatus;
Headend means any facility for signal reception and dissemination on a Cable System, including cables, antennas, wires, satellite dishes, monitors, switchers, modulators, processors for Broadcast Signals, equipment for the Interconnection of the Cable System with adjacent Cable Systems and Interconnection of any networks which are part of the Cable System, and all other related equipment and facilities.
Distribution Network means a 'distribution network' as defined in Special Condition E2A of the Transporter's Licence held by each DN Operator;