Method and apparatus for verifying signaling and bearer channels in a packet switched network
AssigneeTellabs Vienna, Inc.
InventorsJeffrey A. Rosenwald, Joseph D. Kralowetz
Life of this patent
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Abstract
A computer-implemented method and apparatus verifies integrity of a Voice over Internet Protocol (VoIP) virtual connection at an analog terminal adapter (ATA) at an edge of an Internet Protocol (IP) network. A VoIP transaction is initiated toward a cooperating test unit across the IP network, establishing a VoIP virtual circuit. The test unit responds by transmitting a digital representation of or information representing a test tone across the IP network to the ATA. By evaluating the test tone at the ATA, integrity of a bearer channel of the virtual circuit can be verified directly, and integrity of a signaling channel of the virtual circuit can be verified indirectly.
Claims21
A method of verifying integrity of a logical channel traversing a Voice over Internet Protocol (VoIP) network, the method comprising:
- transmitting, via a signaling channel, a signal known to cause a device to respond with bearer information via a bearer channel over the VoIP network;
- generating pulse code modulation (PCM) signals as a function of the bearer information;
- transmitting the PCM signals to a subscriber line interface circuit (SLIC) via a bus;
- and
- evaluating the bearer information based on the PCM signals to verify integrity of the bearer channel on the VoIP network.
An apparatus for verifying integrity of a channel traversing a Voice over Internet Protocol (VoIP) network, the apparatus comprising:
- a control processor configured to transmit, via a signaling channel, a signal known to cause a network device to respond with bearer information via a bearer channel over the VoIP network, and the control processor further configured to evaluate the bearer information to verify the integrity of the bearer channel;
- a digital signal processor (DSP) configured to generate pulse code modulation (PCM) signals as a function of the bearer information and transmit the PCM signals via a bus;
- and
- a subscriber line interface configured to receive the PCM signals via the bus and provide data to the control processor about the bearer information to verify integrity of the bearer channel.
Dependencies are inferred from the claim text.