Powered patch panel
Pre-charging line modem capacitors to reduce DC setup time
Precision, low-power current-sense transmission channel for...
Primary telephone line protector with failsafe
Printed wiring board cable cover
Procedure and device for adaptive digital cancellation of the ec
Process and device for adaptive digital cancellation of the echo
Process and device for adaptive identification and adaptive echo
Process and system for improving echo cancellation within a tran
Process for determining an echo path flat delay and echo cancele
Programmable constant current “off hook” circuit
Programmable device and methods for disabling a ring signal...
Programmable peak detector for use with zero-overhead Class...
Programmable subscriber line circuit partitioned into high...
Programmable subscriber line circuit partitioned into high...
Programmable subscriber line circuit partitioned into high...
Programmable subscriber loop interface circuit and method
Protected telephone network interface device
Protected telephone network interface device
Protected telephone network termination module