Abstract: A two wire DDS Transport System is disclosed wherein digital signals are transported over a single channel between transmission line elements transporting digital data between a Network Service Provider and a Customer's Premises. ISDN U-Interface Transceivers having scaled operating frequencies and data buffers are provided in the transmission line elements, such as an Office Channel Unit (OCU) and a Network Interface Unit (NIU) to increase operating distance.

Abstract: A method and apparatus for local provisioning of a network interface unit. The local provisioning is performed by depressing a pushbutton on the front panel for an extended set determined time, at which time the NIU enters into the local provisioning mode. During this mode, a plurality of LEDs, corresponding to specific provision options, are sequentially lit. When the desired LED provision option is lit, the button is pressed to achieve the desired provisioning. The local provisioning mode is automatically exited after scrolling through all the LEDs.