Since Session Initiation Protocol (SIP) was originally defined as a signaling protocol for multimedia sessions, SIP has grown beyond its targeted use as an IP-based telephony messaging medium to conferencing and instant messaging. A service provider infrastructure focused on supporting IP-based telephony services is necessarily more complex than simple, web-based services. This makes ensuring reliable, scalable services more difficult. This paper addresses the challenges and solutions when providing high-availability and scalability for SIP services.

Junction Networks’ hosted PBX service is named OnSIP, and the company claims to have a unique platform that is built using standards-based components, is 100-percent SIP-compliant, leverages no underlying proprietary components, and is scalable to support thousands of users.

It looks like this summer is shaping up to be a hot one for voip phone manufacturers. Thanks to the rapid adoption of standards based open source and open source based VoIP systems, the emergence of HD Voice and the rebounding of prosumer spending, a plethora of manufacturers will have a new Voip phone hitting the streets over the next three months.

Research firm Dell’ Oro Group recently reported that though overall carrier investment in infrastructure has dropped by as much as 25 percent in Q1 2009 from Q1 2008, there are a few bright spots — perhaps most notably the SIP Trunking market.

If you want to be able to communicate easily and cheaply anywhere in the world via your Windows mobile, then Windows mobile SIP is the fancy thing that will let you do it. If you are within range of a wireless network you can use Windows mobile SIP to communicate with anyone you like without using your cell phone minutes.

Eyeing a move that brings its UC product in direct competition with new business-directed VoIP offerings from Skpe, officials at Microsoft Corp. reportedly say they’ve certified Interoute as the first European service provider to supply a SIP trunking solution for Microsoft Office.

When the topic of video conferencing is broached, the majority of information technology (IT) or telecommunications operations managers usually cringe based on past experiences. One only has to look at the dust-covered legacy systems tucked out of the way in many a conference room to admit there were failings with past promises.

SIP Print announced it has formed a separate organization and associated certification program to test and verify interoperability between various VoIP phone systems and the SIP Print call recording system.

With all the excitement surrounding Skype’s release of VoIP (Voice over Internet Protocol) for iPhone, Blackberry RIM users may have felt a bit left out. Even though BlackBerry VoIP has been around for some time now, the Skype announcement reinvigorated the market and there has been renewed interest in the whole topic of BlackBerry VoIP.

Effective May 15th, 2009, BICSI recognizes The SIP School training for the following BICSI Continuing Education Credits (CECs).”