We have blogged previously regarding Internet Telephony Service Providers (ITSP) and the criteria they should meet in order to be considered. A SIP trunk is another service offered by an ITSP that permits businesses that have a PBX installed to use Voice-over-IP (VoIP) also outside the enterprise network by using the same connection as the Internet connection.

SIP stands for Session Initiation Protocol and is an open-standard which allows carrier voice equipment to integrate seamlessly with customer premise equipment. The logical voice channel established between them is referred to as a SIP trunk; a virtual phone line that utilizes a broadband connection for access.

At one time, businesses had to buy a dedicated line from a telephone provider. Thanks to SIP trunking, businesses can now enjoy lower costs, better communication, and an increased ROI for their business. This method can be used for conferencing, three way calling, traditional voice calls, as well as many other applications that a business needs to function.

Specific Benefits of SIP Trunking:

• Converging your local, long distance and broadband Internet services onto a single pipe with dynamic bandwidth allocation
• Reduce toll charges on long distance calls and eliminate them on local and on-network calls
• Reduce hardware costs and leverage your existing legacy system investment with seamless integration
• Leverage dynamic bandwidth allocation to maximize your network
• Instantly, incrementally and infinitely scale your business communications as demand dictates
• Bring all of your communication needs into one location with one bill and one point of contact.
• Choose DIDs from anywhere in the country and serve them to the central PBX simply and efficiently

With SIP trunking, your communications can easily grow as your company grows. We hope this helps you in your search for the right telephony solutions for your company.