Odd-order low-pass pots device microfilter

Odd-order low-pass POTS device microfilter

Optical coupling circuit for a data access arrangement (DAA)

Optically-coupled data access arrangement and transhybrid

Optimization of a DSL-compatible POTS line card

Optimization of adaptive filter tap settings for subband acousti

Optimized interface between audio/modem board and sound board

Optimized multilayer wiring housing

Opto-coupling device between a modem and a telephone line

Output current and voltage regulating interface for remote...

Output stacking architecture for an amplifier

Over-current verifier circuit for an enhanced subscriber line in

Over-voltage protection circuit for use with a telephone...

Overlapping look-up-and-add echo canceller requiring a smaller m

Overload protection circuit for a telephone subscriber line feed

Overvoltage protection circuits

Overvoltage protection scheme for subscriber loops and method of