Abstract: A method for training line drivers in a communication system; each driver coupled with at least one communication line configured for communicating with subscriber equipment using at least one tone-set; includes the steps of: (a) selecting a test driver; (b) selecting a test line coupled with the test driver; (c) establishing synchrony with subscriber equipment on the test line; (d) applying a test signal to the test line using a selected tone-set; (e) determining noise on the test line; (f) evaluating whether noise on the test line plus a noise margin is within a predetermined range; (g) when noise is acceptable, designating the selected tone-set for operational employment; (h) repeating steps (b)-(g) until sufficient lines are evaluated for the test driver; and (i) repeating steps (a)-(h) until sufficient drivers are evaluated.

Abstract: A method for training line drivers in a communication system; each driver coupled with at least one communication line configured for communicating with subscriber equipment using at least one tone-set; includes the steps of: (a) selecting a test driver; (b) selecting a test line coupled with the test driver; (c) establishing synchrony with subscriber equipment on the test line; (d) applying a test signal to the test line using a selected tone-set; (e) determining noise on the test line; (f) evaluating whether noise on the test line plus a noise margin is within a predetermined range; (g) when noise is acceptable, designating the selected tone-set for operational employment; (h) repeating steps (b)-(g) until sufficient lines are evaluated for the test driver; and (i) repeating steps (a)-(h) until sufficient drivers are evaluated.

Abstract: The apparatus for provides power to selected line drivers in a communication system. Each selected line driver has a respective inherent internal voltage drop. Each selected line driver is coupled with a respective communication loop for providing a respective minimum operational voltage to the respective communication loop. The apparatus includes: (a) a control means coupled with the selected line driver devices for controlling supply voltage to the selected line drivers; and (b) a power supply means coupled with the control means and with the selected line driver devices and cooperating with the control means to deliver a respective supply voltage to respective selected line driver devices. The respective supply voltage is at least equal with the respective minimum operational voltage less the respective inherent internal voltage drop for each respective selected line driver device.

Abstract: A bidirectional telephony (POTS or ISDN) system utilizes RF technology to move the signalling away from the baseband frequency. The method translates baseband telephony signalling into one or more RF signals over twisted pair copper channels, in conjunction with an ADSL or VDSL signal on the same medium.

Abstract: An apparatus for generating a supply signal at a predetermined frequency comprises a digital synthesizer connected with an oscillator and a processor; and a temperature sensor connected with the processor. The oscillator provides a periodic excitation signal to the synthesizer, which responds by recurrently accumulating bits in quantum bit step amounts to a maximum bit capacity and returning to a starting bit count in a bit accumulating period. The synthesizer generates the supply signal based upon the bit accumulating period. The processor provides a control signal to the synthesizer to control the quantum bit step amount. The temperature sensor and the processor cooperatively employ a predetermined temperature parameter-correction factor relationship to adjust the control signal to set the quantum bit step amount to establish the bit accumulating period appropriately for the predetermined frequency.