227529 ⎘
Substation equipment, e.g. for use by subscribers; Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
Sub-classes:Image forming apparatus to which noise counter-measure is applied
#2Analog front-end transmitter and a connection method of an X-digital subscriber line having a pre-distortion mechanism
#3Communication circuit employing optocoupler
#4Apparatus, methods, and articles of manufacture to predict vectored digital subscriber line (DSL) performance gains
#5Telephone system having reduced sensitivity to RF interference and related methods
#6Method for correcting telephone signal degradation caused by the length of the analog line via the receiver
#7Telephone system having reduced sensitivity to RF interference and related methods
#8RF PULSE SYNCHRONIZATION FOR DATA ACQUISITION OPERATIONS
#9Method and hybrid circuit for attenuating near-end crosstalk in a bidirectional signal transmission
#10NONLINEAR DEVICE DETECTION
#11Telephone system having reduced sensitivity to RF interference and related methods
#12RF pulse synchronization for data acquisition operations
#13Bridge circuit to suppress echoes in communication devices
#14Telephone system having reduced sensitivity to RF interference and related methods
#15Telephone line interface, side-tone attenuation circuit and method
#16Method and system for controlling potentially harmful signals in a signal arranged to convey speech
#17Transmitter-receiver
#18Nonlinear device detection