Nortel Networks Corporation

Northern Telecom Limited

Timothy Augustus Kuechler

Robert Barrie Turnbull

David Jeffrey Westergaard

Larry John David

William Allan

Aaron James Bobick

Shane Rogers

Lyle R Button

A telephony system includes a packet-based data network that is coupled to various network elements. The network elements include interface devices that are coupled to corresponding stimulus devices. The stimulus devices may include stimulus telephones or a telephone exchange system. Each interface device receives a stimulus message from a corresponding stimulus device. The stimulus message is encapsulated by the interface device into a packet, such as an Internet Protocol (IP) packet. The packet is communicated across the data network to the target device, which may be another interface device. At the receiving end, the interface device receives the packet, decapsulates the packet to retrieve the stimulus message, and sends the stimulus message to a corresponding stimulus device.

Transporting telephony signaling over a data network

A circuit and method is described enabling a telephone having two or more lines to have the capability of initiating two simultaneous calls, where there is two-way communication on one of the calls (the collaborating call'), and active monitoring of the second call (the 'teleconference'). A router is used so that the outbound audio signal of the user can easily be switched between the teleconference and the collaborating call. At all times, the transmit path of one of the calls is muted to ensure privacy of the other call.

Collaborative conferencing circuit

A circuit for use with a SCWID adjunct to remove A.C. in-band signaling tones from the voice path to a telephone apparatus serially connected to the adjunct. The A.C. signal component is carried on top of the D.C. voltage used to power the telephone. The circuit includes means to monitor the D.C. voltage level and to pass this voltage substantially unchanged to the telephone. The A.C. signal in the form of a FSK tone, received from the central office, is used by the adjunct to provide a subscriber with call feature information such as the identity of a calling party while the telephone is off-hook.

Method and apparatus for removing FSK in-band signaling

Growing community of inventors

Calgary, Canada

Timothy Augustus Kuechler