Session Initiated Protocol trunking otherwise known as an SIP trunk is a voice/data delivery system that allows business and enterprise level establishments to receive feature rich phone service while eliminating many traditional costs that previously plagued many companies. By reducing costs on business phone services, a business can see improved ROI on their I.T. within their first two quarters.

The benefits of deploying SIP service can be boiled down to these simple beneficial elements:

1. Reduced business telecommunication costs give you a better ROI on telecom expenses.

2. International long distance calling billed as domestic long distance.

3. Increased redundancy within your call center voice networks.

4. Lowered network PBX hardware expenses.

5. Scalability within the network without extensive labor and rewiring.

6. The ability to utilize both Intranet/Internet data and voice communications through one connected bandwidth (T1, T3, Gigabit Ethernet, MPLS, OC3, etc.) line.

What Does SIP Trunking Replace?

Quite simply, SIP replaces many traditional business phone service applications including the PSTN (Public Switched Telephone Network), ISDN (Integrated Services Digital Network), BRI (Basic Rate Interface), DIDs (Direct Inward Dial), and PRI (Primary Rate Interface). This allows for a business or enterprise to be networked for phone services and utilize necessary business features including video conferencing, call routing, caller ID, and more at a reduced cost.

How Are Costs Reduced?

Costs are drastically reduced due to the traffic routing and hosting of the IP PBX being performed by the ITSP (Internet Telephone Service Provider) itself. Businesses need not spare the expense of connecting to the PSTN themselves with their own PBX phone systems. SIP trunking also eliminates the limits imposed by traditional T1 line and T3 line voice channel partitioning giving businesses more flexibility with scalability whether it is business growth or recession.

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