IP PBX and Its Uses

The integrated voice features, for example unified messaging and click-to-dial, became available with circuit-switched PBX systems. Complex coordination of voice and data networking environments are required. IP network level however, eliminates much of this complexity, attaining results which are lower costs from consolidating equipment and rapid integration with business applications. The requirements necessary for IP PBX systems to successfully integrate with a packet network are:

-Reliability to minimize the loss of voice packets and control network delay.
-Quality of Service (QoS) to ensure that voice packets are transmitted through each network element with the correct priority relative to other types of packets.

Real Time Protocol (RTP)
RTP uses a set of Internet Engineering Task Force (IETF) standard protocols for reliably transporting voice, video, and data among participating parties across a packet network. Comments requests include:

-The RTP protocol (RFC 2550), carrying voice that has been encoded using ITU G.711 or an alternative codec system. The protocol includes time stamps and sequence numbers, jitter management.
-RTP for dual tone multi-frequency digits carries encoded tones used in interactive voice response (IVR) applications.
-RTP for redundant audio data specifies a mode of transporting same sequenced audio patterns to effectively reduce the number of packets transmitted.

H.323
H.323 - a set of related ITU recommendations that describe the architecture for multimedia communication over a packet-switched network. Key factors:

-H. 323, defining the multimedia infrastructure, including the role of devices, gateways and gate keepers.
-H. 245, specifying the call control processes for establishing and terminating a multimedia session, which includes the exchange of the capabilities supported by client devices.
-H. 450, specifying a set of supplementary devices, like call transfer, hold, message waiting etc. This protocol is useful communication between clients without the aid of a switch.

Session Initiation Protocol (SIP)
SIP is an IETF standard protocol helpful for initiating an interactive user session that carries multimedia subjects. The SIP architecture comes with a method for delivering connections for users at any location where he/she is registered. In contrast to the H.323, SIP uses an extensible text-based format, similar to HTTP. SIP, being the basis for multi applicable programs including instant messaging and gaming. It can function as a standalone call control protocol or together with H. 323.

返回首页

IP PBX and Its Uses

Lastest Update

·Cell Phone Celebrities: Stars on your cell phone

·VoIP - Why Some People Use It

·SMS GATEWAY

·Cut Your Business Overhead With VoIP

·VOIP For Business, Unleashed!

·Gizmo offer free calls with a but

·A Look At The Sleek Motorola RAZR Wireless Phone

·How To Choose The Right Phone And Keep Up With The Times

·Mobile & Cell Phone Information

·VoIP - Does It Live Up To All Of The Hype?

·Can Infrared Spy Cameras Protect Your Property?

·Samsung Z540

·Traveling this Summer? Technology Can Help You Keep in Touch

·Breaking Away From Your Cable Or Satellite Provider For Something A Lot Less Expensive

·Stay in Touch, but Out of Reach

·Why VOIP?

·Make Moving Announcements A Priority For Your Next Move

·Pros And Cons Of Broadband And T1 Service

·Satellite Internet Exchange: Nayasat

·The Real Basics Of VoIP

·The Great Melting Pot - What Most Mobile Companies Dont Know.

·Creative Uses Of Video & Web Conferencing, Part 2

·A Look At Ringtones

·Nokia Ringtones For Everyone

·Camera Phone - Say Cheese

·Satellite TV Review - Compare DIRECTV and DISH Network

·A Look At Mobile Phone Games

·The VoIP Insurgency

·Texting the Summer Away With Your Teen

·Online Radio vs. Conventional Radio Stations

·Tips for Getting the Best from Your Cable Service

·The Games People Play On Mobiles

·Mobile phone reinventing itself with time!

·Now Your Video Entertainment Goes Where You Go

·Video Conferencing It Finally Works

·Telemedicine Treating Patients through Video Conferences

·Wireless Video Conferencing - How The Smithsonian Went Wireless

·Video Conferencing - Courthouses Are Making the Change

·Video Conferencing - How Law Firms Can Benefit

·Send branded SMS messages to your customers Today

·Phones - How To Find The Cheapest Phone Calling Card

·Make Traveling and Navigation a Safe, Enjoyable Experience!

·Business VoIP an Absolute Must

·Tracking Your Fleet With GPS Tracking

·Voice Over Ip What Is It And What Are The Choices?

·The Benefits Of Conference Calling for Businesses

·VoIP - Should I Or Shouldnt I?

·Tracking Your Teens With GPS Tracking

·GPS - Never Get Lost Again With Satellite Navigation

·Cheap mobile phones are easily available