Abstract:
In one embodiment, a first end device associated with a first user and a second end device associated with a second user may be participating in a call. During the call, the second user may wish to transfer the call to a third user. The second user has the choice of using a blind transfer or a consult transfer. In one embodiment, a gateway determines interworking information that is needed to interwork an H.450.2 message for the H.323 protocol to a SIP REFER message, and vice versa, to allow the call transfer.
Abstract:
Various embodiments provide methods and systems operable to receive a VoIP signaling packet, the VoIP signaling packet including information indicative of a request for trace information, to append trace information to the VoIP signaling packet; and to route the VoIP signaling packet with the trace information to a next network element on a path to a destination node. If an error condition is encountered, the VoIP signaling packet with the trace information is routed to a previous network element on a path to a source node.
Abstract:
We describe a system embodiment comprising generating a Secure Real-Time Transport Protocol (SRTP) encapsulated packet and including a secure media indicator into the SRTP encapsulated packet. The method further comprises inserting the SRTP encapsulated packet into an SRTP voice stream associated with an active call between a source and a destination endpoint and indicating an end-to-end secure call between the source and destination endpoints responsive to the secure media indicator.And we describe a method embodiment comprising transmitting a request message from a source endpoint to a destination endpoint participating in an active call and setting a secure media flag in the request message at each node in a signaling path associated with the active call. The method further comprises returning a response message from the destination endpoint to the source endpoint responsive to the request and indicating an end-to-end secure call between the two endpoints.
Abstract:
In a particular embodiment, a network device receives, from a first device, a first call request for a second device. The network device may then send the first call request to a redirect server, which can determine where to send the call. The network device receives a response from the redirect server indicating an address to redirect the call request to. The network device then determines a redirect ID for the redirect. The network device sends a message to the first device with the redirect ID where the message indicates that a redirection occurred to the third device. The network device then receives a second call request from the first device that includes the redirect ID. The network device determines if the call was part of a previous redirect. If so, the second call request is sent to the address associated with the redirect ID.
Abstract:
Various embodiments provide methods and systems operable to provide access to real time control protocol (RTCP) information for improved media quality control. An example embodiment includes a message processor to receive a message, the message including information indicative of an RTP port identifier, and to add to the received message information indicative of an auxiliary RTCP port identifier; and a message communication component to communicate the information indicative of an auxiliary RTCP port identifier to a node.
Abstract:
In one embodiment, a method is provided, including: initiating an interactive voice response (IVR) session between a first endpoint and an IVR system over an IP network; establishing a first media path between the first endpoint and a second endpoint; establishing a second media path between the first endpoint and the IVR system; and receiving at the IVR system a notice of a telephony event from the first endpoint. In another embodiment, a method is provided, including: initiating an interactive voice response (IVR) session between a first endpoint and an IVR system over an IP network; establishing a secure media path between the first endpoint and a second endpoint; and receiving an unsecured notice of a telephony event from the first endpoint.
Abstract:
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.
Abstract:
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.
Abstract:
In one embodiment, a method includes initiating an interactive voice response (IVR) session with a user over an IP network, identifying an imminent secure session event, and initiating an encrypted mode for the IVR session.
Abstract:
Various embodiments provide an apparatus and method for handling dynamic payloads in a heterogeneous network. An example embodiment includes a first node interface to receive a first request for data communication from a first node, the first request being coded in a first protocol and including information identifying a first payload type. The example embodiment includes a second node interface to receive a second request for data communication from a second node, the second request being coded in a second protocol and including information identifying a second payload type. The first node interface of the example embodiment configures a message coded in the first protocol to include the information identifying the second payload type and to send the message to the first node.