Abstract: A dial pulse register/sender for use in a telephone system operating in time frames each consisting of a plurality of time slots. The register/sender is capable of detecting and sending supervisory signals in dial pulse format for each time slot. The register/sender includes an integrator for filtering contact bounce, a timer for detecting a change of state in the supervisory signal, a pulse counter for counting the digits received, and sender for sending supervisory signals. Each time slot has one memory location and sequentially uses common logic of the register/sender.

Abstract: A service generator and method for generating a plurality of tones for use in a telephone system operating in time frames each consisting of a plurality of time slots. The service generator includes tone generators for generating each time frame pulse code modulated tone samples for a plurality of tones, a tone multiplexer for multiplexing the tone samples onto a common bus each time frame, matrix means connected to the common bus for connecting selected ones of the tone samples to selected time slots in each frame, and control means connected to control the matrix means for specifying the selected ones of the tone samples and for specifying the specified time slots.

Abstract: Service generator checking apparatus and a method in a telephone system operating in time frames each consisting of time slots. The apparatus sends a tone sample signal in one frame through a system interface having an input portion and an output portion, and compares the sent tone sample signal with a stored sample in a subsequent frame, thereby verifying that the interface is operational.