SIP or PRI Trunks - Which Should You Choose?

Posted on Thu, Jan 3, 2019 @ 08:08 AM by Irvin Rodriguez

Both, SIP (Session Initiation Protocol) and PRI (Primary Rate Interface) trunks play important roles in the telephony Businessman holding digital icons, Cloud computing conceptworld of business. They provide access for voice and data to be delivered to your business. According to Mike C. Smith, contributing author for Computerworld, "ISDN PRI still works fine, but it simply cannot compete with the DR capability of SIP trunking."

If you are just starting out or need to upgrade your current equipment, we'll breakdown what you need to know.

PRI has been around for many years. It is used by medium to large businesses who need multiple lines to handle their incoming and outgoing calls and digitally transmitted data. The necessary hardware installed will need periodic maintenance or perhaps eventual replacement down the road. It can get pretty pricey over the long haul.

SIP is the newest wave of technology in telephony, breaking the costly barriers of PRI trunks. In fact, Frost & Sullivan, a research and consulting organization for businesses that has always focused on the "next big thing," predicts that market revenues for SIP and VoIP services are expected to grow at a compound annual growth rate (CAGR) of 21.5% from 2015 to 2020, and a user base at a CAGR of 18.1%. In short, this wave of technology may well grow to tsunami levels as it sweeps across the telephony industry.

Operating in the cloud, cost for installation is considerably less expensive than the hardware associated with old school PRI equipment. And that is just the initial perk! VoIP (Voice over Internet Protocol) has made great strides in reliability. Crystal clear voice transmissions with each call your business makes or receives, speedy data transmissions and a vast array of functions available to businesses could, easily, make it well worth deciding to go with SIP over PRI for your telephony needs.

Much like HTTP (Hypertext Transfer Protocol) or SMPT (Simple Mail Transfer Protocol), SIP is a networking telephony protocol rather than a telephone technology like PRI. And, because SIP trunks are virtual, there is no additional hardware to install. A business can use SIP for voice without need for an existing PBX since many SIP providers offer hosted PBX. As with PRI, SIP is capable of delivering multiple voice lines to a single organization.

One of the greatest benefits to SIP is flexibility. At the same time, this is one of PRI's biggest drawbacks. With a SIP trunk, as your business and telephony needs grow, you can add more SIP trunks easily. It will probably take no more than a call or online contact to a SIP provider and the deal is done. In the case of a hosted PBX service, upgrading your service subscription to include more users or lines. Upgrading your PRI system will entail on-site equipment installation and, possibly, another PRI circuit installed or maintenance to your existing equipment.

Since SIP trunking requires little-to-no hardware deployment, it is often viewed as the more cost-effective of the two. Some providers, of either type of trunk, charge on a per-usage basis as with a typical phone bill, while others offer a flat rate.

There is a con with SIP that most would consider huge—when your Internet goes down, your telephone system goes down, too. But, that doesn't have to be an issue. Redundancy can be achieved with a failover Internet connection such as LTE or WiMAX.

At nexogy, we strive to be on the cutting edge of the newest technology. You can trust us when we say VoIP is the way to go! We are ready and able to provide you with the information that allows you to make informed decisions regarding your business telephony needs. And, when you see all that we have to offer, we feel certain you will entrust us to provide those needs for years to come.

Our customer service team is at the ready.

Contact us today!

Topics: hosted VoIP, pri trunk, sip trunk

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About the Author

Irvin Rodriguez
Irvin Rodriguez
Irvin is a perceptive, results-driven, focused Engineering professional with outstanding success directing a broad range of engineering projects while participating in planning, analyzing and implemen...read more