Back to results
US 5,706,336 AGranted
Telephone system circuitry for discriminating between voice and data transmissions
AssigneeElonex I.P. Holdings, Ltd.
InventorDan Kikinis
Life of this patent
Estimating the term…
Abstract
A selective call-waiting system for telephony use samples transmission on a busy line if the line subscribes to the selective call-waiting service, and avoids interrupting the transmission with a call-waiting signal if the transmission is data-type. If the transmission on the busy line subscribing to the selective call-waiting service is voice-type, the system sends a call-waiting signal. Signal analyzers are disclosed, as well as methods for practicing the invention.
Claims3
A signal-analyzer plug-in card comprising:
- an interface adapted for connecting to a subscriber line interface circuit (SLIC);
- discrimination circuitry coupled to the interface and adapted for determining between voice signals and data signals in an ongoing established communication between two active terminals;
- and
- a digital communication port adapted for communication with a CPU;
- wherein the discrimination circuitry determines the voice or data nature of the established communication, and communicates the voice or data nature to the CPU via the digital communication port.
2 more elements
A line card for a telephone switching system, comprising:
- a first interface for connecting the line card to a time-slot switch (TSS) and a second interface for connecting the line card to a subscriber line;
- and
- discrimination circuitry coupled to the second interface and adapted for determining between voice signals and data signals in an ongoing communication;
- wherein the line card is adapted to communicate with a CPU through the TSS to inform the CPU on command of voice or data nature of telephone signals carried by the line card.
1 more element
A trunk card for a telephone switching system, comprising:
- a first interface for connecting the trunk card to a time-slot switch (TSS) and a second interface for connecting the trunk card to a trunk;
- and
- discrimination circuitry coupled to the second interface and adapted for determining between voice signals and data signals in an ongoing communication;
- wherein the trunk card is adapted to communicate with a CPU through the TSS to inform the CPU on command of voice or data nature of telephone signals carried by the trunk card.
1 more element
Dependencies are inferred from the claim text.