Voice over IP (VoIP) Enhancements

This feature allows host developers to solicit Call-ID information for outbound SIP calls.

The SIP Call-ID is a globally unique session identifier that you can use for several purposes, including call logging and billing correlation.

The Excel SIP software reports Call-ID information for inbound calls. With this feature, the same capability is provided for outbound calls.

The SIP and H.323 software is enhanced to communicate a list of codecs in outbound SIP and H.323 offers.

Typically, an offer for establishing a media stream consists of a prioritized list of codecs that the originating end-point is willing to support, and an ‘answer’ consists of one codec from within that list that the receiving end-point agrees to support as well. This feature eliminates the limitation that the originating end-point is expected to know the exact codec the receiving end-point will accept.

This feature allows host application developers to control the SIP response code when the CSP rejects incoming registration requests.

Prior to the release of this feature, the SIP stack sent the hard-coded 503 response code when rejecting an incoming registration.

The CNAME field is supported for the IPN-2 and VDAC-ONE cards. The CNAME field will automatically be populated at channel configuration time and included in the RTCP Sender Report. The CNAME field is not configurable.

The data used for the CNAME field is comprised solely of the ASCII character formats for the VDAC/IP module’s source IP address (15 bytes) and source UDP (RTP) port number (5 bytes) for a specific RTP voice session, separated by an ASCII "colon" (":") character (1 byte).

This feature allows the IP Network Interface Series 2 Card to be forced into using a 100 Mb connection by setting a DIP switch on the card. Prior to this release, the default behavior was to auto-negotiate between 10 Mb and 100 Mb connections.

Session-Initiation Protocol. A signaling protocol used for establishing sessions in an IP network. A session could be a simple, two-way telephone call, or it could be a collaborative multi-media conference session.

Internet Protocol. Part of the TCP/IP family of protocols used to route messages and tracks the addresses of nodes.

ITU-T standard defines a set of call control, channel setup, and codec specifications for transmitting real-time voice and video over networks that do not offer guaranteed service or quality of service.

A computer, attached to the Excel platform through an RS-232 or Ethernet link, from which you run the telecommunications application that controls the Excel platform.

Real-Time Transport Control Protocol.

American Standard Code for Information Interchange

Real-Time Transport Protocol. Supports transport of real-time data like interactive voice and video over packet-switched networks.

The protocol used in most local area PC networks. Typically, most Ethernet networks support data transmission speeds up to 10 Mbps, but 100 Mbps is also possible.