Cisco Technology, Inc.

Vijay Arumugam Kannan

Parameswaran Kumarasamy

Sandeep Singh Kohli

Paul Edwin Jones

Jayesh Chokshi

Kavithadevi Parameswaran

Sabita Jasty

Yosef Rizal Tamsil

Paul R P Chu

Sunila R Ainapure

Yaan Mirng Jeffrey Chen

Sheshadri V Shalya

Faisal Sivayudeen

In one implementation, an intermediary receives a message from an endpoint, includes a flow around address and a flow through address to a second network device listed in the first message. The intermediary requests another endpoint to perform a connectivity test to determine the reachability of the originating endpoint. The connectivity test may be performed using methods such as ping, probe, interactive connectivity establishment (ICE), or session traversal utilities for network address translation (STUN). The intermediary may request originating endpoint a similar connectivity check and establish a media stream based on results of the connectivity tests. The media stream may be a voice over internet protocol (VoIP) call.

System for establishing a media stream

A method for interworking supplementary call services between different VOIP protocols is provided. The method comprises receiving, during a call between a first end device and a second end device, a first message in a first protocol format for the second end device to transfer the call to a third end device; determining interworking information to interwork the first message to a second message in a second protocol format; generating the second message based on the interworking information, such that the second message initiates the call transfer to the third end device.

Interworking supplementary call services between different communication protocols

In one embodiment, interworking procedures between H.323 and SIP ensure that in-band tones and announcements, along with local and remote ringback, are properly played or generated.

Properly playing in-band tones before call establishment when performing protocol interworking

An apparatus and method for negotiating media capabilities is described. The method may comprise receiving an invite to establish a connection between a caller endpoint device and one of a plurality of callee endpoint devices of a shared line and identifying an initial common media capability between the caller endpoint device and the plurality of endpoint devices. Thereafter, the method may comprise negotiating a connection between the caller endpoint device and the callee endpoint device using the common media capability and determining if the caller endpoint device and the callee endpoint device have a common enhanced media capabilities. The connection may be re-negotiated using the enhanced media capability.

Utilization of media capabilities in a mixed environment

Various embodiments provide a method and apparatus for providing secure blast calls. An example embodiment includes a secure blast call apparatus including a blast component to determine if a secure or a non-secure call connection is needed and to blast a call connection invite to a plurality of destination endpoints; and a connection component to determine if a responding destination endpoint is a secure or a non-secure destination endpoint, to establish a connection with a secure destination endpoint if a secure call connection is needed, and to establish a connection with a non-secure destination endpoint if a non-secure call connection is needed.

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Milpitas, CA, United States of America

Vijay Arumugam Kannan