Why SIP? Nine Benefits of SIP Trunking

Posted by Sam Mountstephens on Dec 1, 2017, 4:09:00 PM

According to a recent study, the average employee uses 36 cloud-based applications in their job. As the growth of cloud-based applications continues, more organizations are seeking efficiency.

SIP trunking, which is a method of delivering voice communication over VoIP, fits the bill. The advantages for businesses of all sizes are apparent - from cost savings, to scalability and the elimination of unnecessary infrastructure. Below is a detailed list of benefits that helps to explain the growing popularity of SIP trunking:

1) Consolidation of Overlapping Networks and Costs

Instead of operating separate voice and data networks, companies can consolidate all operations and expenses on one IP-based network that manages all voice and data capabilities. In addition, as a company grows, the required infrastructure is already in place. This eliminates the need for any physical additions in the future.

A single SIP trunking account can serve an entire organization, regardless of the size. Similarly, multi-site locations can use a the same SIP trunking account rather than multiple sub PRI connections. This represents a huge cost saving opportunity. 

2) Elimination of PRIsSIP trunking helps to improve efficiency and increase productivity in the workplace

SIP trunking eliminates the need to purchase PRIs (Primary Rate Interfaces) or local PSTN gateways helping to lower telephony costs. It’s much easier and less costly to extend the system over IP. Due to the fact that the SIP trunk connects directly to the chosen internet telephony service provider, there is no need to pay for these subscription fees.

Instead of purchasing lines in blocks of 24 or 32, the flexibility and scalability of SIP trunking means that lines can be purchased as needed and at a more affordable price.

3) An Increase in “Local Calls”

All calls are still rated based on local and long distance but if a company uses a hosted PBX system with SIP trunks, offices can be easily connected without having to pay for long distance calls. Traditionally, dialling an extension number for a co-worker at a location on the other side of the country would incur long distance charges, but with SIP trunking this call is considered on-net and therefore is classed as local.

Similarly, companies can mask their phone number with a local area code. While this does not change the type of charges the company will have to pay for, it helps to provide a local presence.

4) The Decline of Toll-Free Numbers

Instead of providing standardized toll-free numbers that are often associated with large companies lacking a local presence, SIP trunking providers can set up numbers with local area codes. Any calls made to these customized numbers can be terminated locally and routed over the internet to the company’s call center or head office.

5) Unified Communications

By eliminating the need for separate voice and data connections, SIP Trunking provides an opportunity for businesses to create an IP-based UC system. This can bring together voice, data, instant messaging and other cloud-based applications, ensuring real-time and non real-time communication can be easily handled on one platform.

6) Increased Productivity 

SIP trunking allows employees in different locations to contact each other with ease. A seamless connection between multiple offices, remote workers and employees on the move can streamline communication and ensure projects remain on time and on target.

In addition, as the SIP trunking is an outsourced service, a traditional on-premises system is no longer the single point of failure. So if the business site experiences downtime, it won’t be a problem for the SIP service provider to reroute numbers and calls immediately.

7) Scalability

Unlike POTS and PRI lines, SIP trunks can be scaled as needed for growing businesses

As we’ve established, SIP trunking relies on a connection over the internet. This means that lines and services can be added or modified with ease. Unlike traditional POTS and PRI lines, SIP allows companies to pay for only the lines that they require so there’s no need to purchase surplus lines in preparation for temporary peak times.

8) Reliability

SIP trunking with VoIP adds a layer of redundancy. In the event of a system failure or local power outage, SIP trunking providers can automatically reroute services to other locations, cell phones or wherever you desire. Your business can continue to function as normal.

9) User Experience

Employees benefit from a simple interface that allows them to place and receive calls, whether internally and externally, with ease. Similarly, businesses can scale up or down without having to incur significant capital expenses or charges. This means that regardless of current business size, SIP trunking can be an easy way to manage phone services.


SIP trunking is a powerful service for any organization. The advantages are valuable for all organizations, regardless of size. An enterprise organization can maintain a local presence thanks to the capabilities of SIP trunking, while a small business can appear large and professional.

Ultimately, cost savings and efficiencies experienced as a result of deploying any system are what matter most. SIP trunking can certainly achieve these.

To find out more about SIP trunking and VoIP services from One Ring Networks, please contact us at 404-303-9900 or email our team at sales@oneringnetworks.com