10 of the Most Popular SIP Trunking Features

We’ve written a lot about the cost benefits of SIP trunking. There is no doubt that reduced business communications expenses is a leading driver of the massive migration from traditional PRI lines to SIP trunking. Of course, people wouldn’t (or couldn’t) take advantage of the cost savings if SIP didn’t offer the features necessary to meet the needs of the business. Here’s a look at some of the most popular and important features offered by the best SIP trunking vendors.

Toll-Free Numbers

In addition to having local direct inward dial numbers (DIDs), SIP Trunking also supports 800 and other toll free numbers for businesses that need them.

Multiple DID Options

SIP trunking uncouples the physical location of the phone from the phone number, making it possible for businesses to have phone numbers that appear local to a specific market without having a physical office in the area.

Remote Offices with Local Numbers

In the same way, SIP trunking makes it possible for employees to work from anywhere and still have a phone number that is local to wherever the business is headquartered.

Call Data Records

Call Data Records (CDRs) help users understand their communication needs and provide insight into business activities. The best solutions make CDRs available in near real-time and make it easy to review call history for up to a year in the past.


A service called “nomadic 911” or “e911” gives users the peace of mind that their calls to 911 will be automatically routed to the local emergency center associated with their physical address.

Caller ID

SIP trunking customers enjoy inbound Caller ID as well as customizable outbound Caller ID that lets them set the individual or business name.


Because SIP is the industry standard protocol for voice, it is supported by most modern VoIP equipment and software including IP PBX systems, desk phones, and VoIP gateways. You can choose the hardware and software combination that is right for your business.


Advanced voicemail features that are included in many PBX systems, such as voicemail to email, are supported by SIP trunking.

Disaster Recovery

In an emergency, power outage, or other event that prevents employees from getting into the office, SIP trunks can be rerouted to other locations so that business can continue uninterrupted.

International Toll Fraud Prevention

Be sure to select a SIP trunking provider that offers automated toll fraud protection. These systems are designed to recognize suspicious calling patterns and temporarily suspend international calling to reduce the impact of fraudulent attacks.

Customers who choose SIP trunking don’t have to make a compromise between value and functionality. SIP is designed to support modern communications and offer businesses all of the features they need to be productive and profitable.


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