H.323 acts as a wrapper for media control and setup and includes H.225, which establishes communication between two hosts, and H.245, which establishes properties such as audio codecs and logical channels for the media transfer.
- [Instructor] In this graphic showing a complex network,…I'm going to focus on the H.323 signaling…up here in the local area network.…Where you see the call agent, or media gateway controller,…communicating with another call agent.…H.323 signaling is an ITUT recommendation…for audio and video communication across an IP network.…In case you're not familiar with this protocol,…we can go to the source to find out…more detailed information about it.…
I'm at this page here with…the Internet National Telecommunications Unit…where we can see this recommendation H.323.…Keep in mind it's a recommendation, not a law.…It's a guideline for better interoperability.…I then selected the hyperlink for the PDF…and I've opened the document.…Now, there's quite a bit to this document, but as I said,…if you wanted a little bit more detailed information,…you can go to the source.…
H.323 itself isn't a protocol.…It acts as a wrapper for media control…that includes H.225 and H.245.…These are protocols that have a specific role…in the call setup process.…
Lisa Bock compares the traditional Public Switched Telephone Network (PSTN) to VoIP, and discusses the framework and components necessary for VoIP to be possible. She reviews codecs, including characteristics such as bitrate and voice quality; protocols for setup, communication control, and data transport; and media gateways, signaling protocols, and intermediary systems such as translators and mixers. Lisa then reviews business integration and the importance of conducting a needs analysis and network assessment prior to implementation. Learn about the many value-added services UC can provide, such as integrating VoIP with email, billing, management software, and other customer management systems. Lisa wraps up with a discussion on how ensuring quality of service (QoS) in a VoIP network minimizes latency and jitter and the importance of VoIP security to prevent malware, impersonation, hijacking, and denial of service attacks.
- History and evolution of PSTN
- UC overview and components
- Gateways, including signaling gateways, translators, and mixers
- Integrating VoIP and UC into your business network