Cisco Technology, Inc.

Mohammed Taher Shaikh

Parameswaran Kumarasamy

Jayesh Chokshi

Vinay Jayant Pande

Paul R Chu

Viraj Raut

Xiaode Xu

Ilya Umansky

Maulik Shah

Sabita Jasty

Kevin J Connor

David Wayne Mills

Henry Louis Fourie

Vipin Palawat

Paul R P Chu

Radhika Padmanabhan

Todd M Baker

Sunila R Ainapure

Paul Antinori

Da Lin

Farrukh Hassan

Joseph L Duffy

Sairam Yadlapati

Janet Helen Byron

Raghunath Dendukuri

Mohanan Chalilputhenpurayil

Rashad Azhar

Kevin Joseph Connor

In accordance with at least one embodiment of the present invention, a communication apparatus includes a communication unit configured to send and receive messages on a network. Each message has a message header configured to include a plurality of header fields, where the message header includes a suppression header field that indicates a request to suppress at least one header field in at least one subsequently sent or received message. The communication apparatus is configured to establish a suppressed header field message exchange session with a peer on the network so that at least one subsequent message exchanged between the communication apparatus and the peer is free of at least one suppressible header field.

Method and system to enhance performance of a session initiation protocol network and its elements

Techniques and systems for inter-working between different protocols are disclosed. In one embodiment, a protocol inter-working system can include: (i) a first server that can connect to a first gateway, where the first server and the first gateway can operate in a first protocol; (ii) a second server that can connect to a second gateway, where the second server and the second can operate in a second protocol; and (iii) a controller that can connect to the first and second gateways, where the controller can translate a first indicator in the first protocol to a second indicator in the second protocol. The first and second protocols can include H.323 and session initiation protocol (SIP), for example. The first and second indicators can each include a message waiting indicator (MWI), for example.

Techniques for message waiting indication support across different protocols

In an example embodiment, a Voice over IP (VoIP) system that provides for media forking at the caller's (ingress) gateway. The gateway receives data with a first address on a recording server for sending forked caller stream media and a second address on the recording server for sending forked called party stream media. The gateway sends forked media from the caller stream to the first address and forked media from the called party media to the second address. This provides a recording from the caller's perspective. By using this technique, the recording can include for example call transfer data and interactive voice response (IVR) data.

Media forking

A contact center is provided. The contact center includes a processor; and a memory in communication with the processor. The memory includes computer code executable with the processor. The computer code is configured to place a phone call through a media gateway to a communication device, receive a tone message from the media gateway, the tone message including a call progress event that defines a type of tone that was detected in the audio stream, determine a call treatment as a function of the communication device status, and perform call treatment for the phone call.

Call progress analysis on the edge of a VoIP network

A network device has a H.323 interface to communicate under a H.323 standard of the International Telecommunications Union. The device also has a Session Initiation Protocol (SIP) interface. A processor converts signaling messages between H.323 and Session Initiation Protocol to establish a fax session for communication of packetized fax signals and data.

H.323 to SIP fax interworking

Techniques for determining media statistics for a communication from a first device to a second device are provided. The techniques include receiving media traffic for the communication at a network device configured to receive the media traffic from the first device. The network device is also configured to transmit the media traffic to the second device. A copy of the received media traffic is also forked to a processor. The received media traffic is sent to the second device while the forked copy of the media traffic is analyzed at the processor to generate media statistics about the media traffic.

Techniques for measuring media statistics on forked media using a DSP

Methods and systems for optimizing interworking between various communication protocols are provided. The method comprises establishing a communication connection between a first endpoint and a second endpoint, wherein the first endpoint communicates over a first communication protocol and wherein the second endpoint communicates over a second communication protocol; and monitoring communication between the first and second endpoints such that communication messages that are transmitted by the first endpoint over the first communication protocol can be mapped to counterpart messages to be received by the second endpoint over the second communication protocol, and communication messages that are transmitted by the second endpoint over the second communication protocol can be mapped to counterpart messages received by the first endpoint over the first communication protocol.

Optimized interworking between different communication protocols

Techniques for providing a bulk refresh of sessions in a network are provided. A plurality of session identifiers for sessions that were created are determined. These session identifiers may be included in a bulk refresh message. The bulk refresh message is sent to a device configured to determine if sessions associated with the plurality of session identifiers are active or inactive. The device then sends a response to the refresh requestor. The response can be used to determine which sessions are active or inactive. After the determination, actions can be taken in order to clear the hanging session. For example, the session may be torn down or a BYE message may be sent to end the session on a peer device.

Techniques for bulk refresh of sessions in IP networks

A device and method provides a means for monitoring a media segment of a Real-time Transport Protocol (RTP) media stream without interfering with end-to-end monitoring of the RTP media stream. The device includes a media segment monitor to generate segment control messages associated with a selected segment of the RTP media stream transmitted between a source endpoint and a destination endpoint in a packet network. The device further includes an interface to transmit and receive the segment control messages; and a processor to process the segment control messages, the segment control messages including call quality metrics related to the selected segment of the RTP media stream.

Media segment monitoring

Negotiation of RSVP reservations prior to the setup of a call, rather than negotiating reservation parameters during the call. RSVP reservation parameters are negotiated prior to ringing a device, rather than after. In some embodiments, this is achieved by including information in the initial call signaling elements. This added information allows negotiation with each device in the proposed data path to determine, prior to ringing the terminating device in the data path, whether each of the devices can support the proposed data link.

Dynamic multi-hop negotiations

To provide for interoperability of Session Initiation Protocol (SIP) and H.323 for Secure Realtime Transport Protocol session establishment, a transmit key is received in a first protocol from a first endpoint. The transmit key is mapped from the first protocol to a second protocol and sent in the second protocol to a second endpoint to establish a secure communication session between the first endpoint and the second endpoint.

System and method providing for interoperability of session initiation protocol (SIP) and H.323 for secure realtime transport protocol (SRTP) session establishment

Systems and techniques to determine that a VoIP call is an inactive media call. One or more counters may be used to determine information indicative of an elapsed time since the last valid media packet sent/received. When the elapsed time exceeds a threshold time, the call is determined to be an inactive media call. The call may be designated as inactive, may be terminated, or other action may be taken based on the determination that the call is an inactive media call.

Growing community of inventors

Fremont, CA, United States of America

Mohammed Taher Shaikh