Lucent Technologies Inc.

At+t Corp.

Avaya Inc.

Avaya Technology LLC

Rickie E Meis

Harsh V Mendiratta

Chandra Mouli Ravipati

Norman C Chan

Christopher David Baldwin

Mark T Rolfs

Richard K Lee

Anthony T Ackerman

Donna W Herrick

Barry E Weiss

An initial request is received to establish a communication session. The initial request contains a communication address of a first communication device. A communication server detects that the communication session cannot be established across a primary network. In response, the initial request is repurposed by changing the first communication address to a second communication address. The changed request is sent to a communication system, which adds a field to the changed request that indicates that the changed request is to be sent via a secondary network. The changed request is sent with the field to the communication server. The changed request with the second communication address is sent to a gateway to establish the communication session across a secondary network. A portion of the communication session is established using the second communication address. The first communication address is sent in the portion of the communication session using Dual-Tone-Multi-Frequency (DTMF).

Communication failover in a distributed network

The subject invention is directed to a method and system for removing music or other unwanted noise from a conference call particularly when the music or other unwanted noise is not directly under the control of the telecommunication equipment the user is attached to and using. The method and system detects the unwanted sound, deactivates the sound source or disconnects from the line carrying the sound, monitors the disconnected line for voice energy, and reconnects the line when voice energy is detected. This capability provides the telecommunications equipment user with control over unwanted music sources being provided by equipment located either in the private or public networks.

Method and apparatus for suppressing music on hold

Calls redirected off-net, which includes call forwarding and call coverage, is provided at the switch to which the call is initially directed (the principal party's switch), by monitoring the redirected off-net connection with a call classifier and listening for the appearance of ringback tone and the appearance of voice frequency energy. The call is allowed to be completed to the off-net covering end-point if voice frequency energy is detected before ringback tone appears or if voice frequency energy appears within a predetermined time-out interval. If ringback tone continues beyond a time-out interval, if voice-frequency energy is not detected within the time-out interval, or if a call progress tone other than ringback is detected, further processing of the call is continued at the principal party's switch to determine if another covering point is listed. If no other coverage point is listed, monitoring of the call continues until the calling party hangs up. A simulated bridged appearance is maintained at the originating switch to allow the call to be picked up at the covered station at any time.

Coverage of redirected calls

In a network of telecommunication switches, a first switch redirects a to-be-covered call to a remote call-covering endpoint served by a second switch, without losing control over the call. The first switch accompanies connection of the call to the second switch with signaling that identifies the call as a coverage call. The second switch responds to the signaling by determining the available status of the remote covering endpoint and signaling the status back to the first switch. If the remote covering endpoint is available, the second switch takes steps to connect the call to the endpoint. If the remote covering endpoint is not available, the first switch disconnects the call from the second switch and proceeds to cover the call to an alternative covering endpoint. The net effect is that call coverage works--from a user viewpoint--identically across a network of switches as it does on a single switch.

Arrangement for extending call-coverage across a network of nodes

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Arvada, CO, United States of America

Rickie E Meis