SIP Trunking will provide you the phone service that you have always counted on while significantly lowering your monthly expenses.

Benefits of SIP Trunking far out weigh that of traditional phone service: it will add flexibility, mobility, redundancy and failover. Things you just don't get from your old legacy phone lines.

What is SIP Trunking

Simply put, Phone Lines. SIP Trunking allows you to connect your phone system to the Public Switched Telephone Network and routes all calls over internet. Some of the most significant advantages of SIP Trunking is its ability to reduce your monthly costs, add flexibility, add redundancy and add failover to your phone service.

VOIP Phone System with SIP Trunking

Most businesses with a VoIP phone system use SIP Trunking for inbound and outbound calls. Those systems come pre-equipped to handle SIP Service without having to add additional hardware. This gives you the flexibility to choose a provider you trust will give you a great product with great service at the best value.

Additionally, with SIP trunks, its less expensive to buy Direct Inward Dialing numbers (DID) or a local, vanity or toll-free phone number.

What is SIP Trunking


Customer Service Customer Service

Customer Service

We have simplified the quote, order and support process but we have not compromised on the customer experience.

Secure Secure


In this cyber-attack world, we believe security must lie at the core of your communication platform. Our SIP Trunking comes with 100% security to keep internet attacks at bay.

Resilience Resilience


Regardless of the emergency, natural disaster, or other; we stay with you to keep your phone system running and maintain the flow of your customer calls.

24/7/365 Support 24/7/365 Support

24/7/365 Support

Issues are common in internet-based devices. We offer 24/7/365 support to keep your business going.

Why Choose Us

We will bring you into the Modern Era!

Often times businesses are on the lookout for the most cost-effective solution to run their company without compromising efficiency. These businesses hire passionate employees, take care of interior designing, use high tech devices to make sure employees show up to work, and follow the advice of others to keep their business up to date. But they overlook the most important part of any company: The Phone System.

Despite living in a high-tech world and knowing its benefits, many businesses still rely on traditional phone systems to receive calls from clients. But those who have embraced VoIP are enjoying a 40% cost reduction on local calls and 90% on international calls.

How do you beat competition if your communication system is not ready to meet the increasing number of customers?

SIP Trunking transforms your business into a high-tech brand, enabling you to meet the growing needs of your customers.

  • Business Growth
  • Resilience
  • Business Continuity
  • Compatible with PBX platforms
  • Cost Saving
  • Flexibility
Why Choose Us

Cost Reduction

Legacy phone service needs wiring, hardware, and circuit boxes to maintain a PSTN connection. SIP Trunking, on the other hand, is installed virtually on your internet connection. Thus, completely eliminates the need to connect to Legacy phone lines. This single quality of SIP saves you a lot from physical installation costs. In fact, you will see on your Legacy phone bill, the cost of your service rising to as much as $100/Line or more. Your current provider wants you off of that Legacy service because it is so expensive for them to maintain.

With Legacy phone lines, there is a vast difference between charges of local calls and international costs. SIP Trunking is based on the internet, so the charge difference is much shorter. An additional benefit of SIP Trunking is that you only pay for lines you use as opposed to traditional systems where you have to pay for all phone lines, no matter if you use them or not.

Reliability and Security

Do your Legacy phone lines have built-in disaster recovery in case of emergencies? And how would stay connected with your customers and remote team if something goes wrong with your Legacy phone lines?

Being connected through wired phone line systems are as good as the conditions allow. The moment a disaster strikes, all your connections are lost. SIP Trunking forms a virtual connection between your business and your clients. Consider it invisible so physical issues won’t affect it as much. Even if something happens out of the blue, SIP reroutes the data or call to an available mobile phone or remote office to keep your business going despite all odds.


Legacy phone line systems do feel like a real headache when it comes to add, moves or changes to those phone lines. It requires the phone service technician to go through an entire procedure of making changes to the existing system (hardware purchase, installation and maintenance cost) and charge you for their Time & Materials.

The more you grow, the more you have to pay for extra trip and installation charges. And the more time you have to wait before the system starts working to meet your needs. With SIP Trunking, you just request us to add additional channels to your system. The work will be done in a matter of minutes. There are no extra charges or waiting for the installation guy to arrive and complete his work.

Minimized Maintenance

Since there are no requirement for physical connection like wiring or circuit boxes, your maintenance time and charges are reduced significantly. There’s no need maintain an analog or IP infrastructure as a ritual of keeping your phone system alive and increase the bills in the name of maintenance.

How does it work?

How does it work?

To understand SIP Trunking, you first have to know how the traditional phone system works:

You simply dial the number, it passes through Your Phone System, crosses over a PRI or copper lines and to finally reach the phone you are calling. The process is the same when a customer wants to call you. A PRI lines holds a maximum capacity of 23 calls at a time. That is, it.

SIP Trunking, instead of copper lines or PRI’s, carries all your calls through an internet connection which gives it an infinite capacity to make multiple calls with multiple channels over a properly sized internet connection.

Important terms to understand:

PBX stands for Private Branch Exchange (also known as traditional or legacy phone system).

PRI (Primary Rate Interface) connects one call to another via copper lines. It has a maximum capacity of 23 concurrent phone calls.

Rest Assured, You or Your Company is Covered

Multiple calls from clients not getting thought to your system? Employees can’t keep up with each call they receive? Your phone bills are piling up and increasing every month?

STRATUS' SIP Trunking service will save you money, increase flexibly and add redundancy to your phone system. Our SIP Trunks are compatible with almost all leading IP PBX Platforms and VoIP Phones.

How does it work?

Frequently Asked Questions

If you put continuous effort into your business, it grows naturally. The problem arises when you can’t keep up with the growing demand of customers and employees. Each needs their own attention and desire a quick response. Also, remote teams want constant connectivity to your business to stay up to date with what is happening. With its qualities such as increasing channels at any time and low maintenance costs, SIP Trunking allows your business to keep up with the pace.
Legacy phone service costs you a fortune if you relocate your business to another city. Also, the cost of wiring, installation, area code changes, phone number changes, etc., cut into your valuable time and money. Our service is in the Cloud, so SIP Trunking allows you to keep your existing numbers when you move to your new location. No hassles at all.
STRATUS provides high call quality by supporting G.711, G.729, u-Law, and a-Law Codecs for your SIP Trunking services.
Want to be available everywhere in the country, but unable to expand your branches? SIP Trunking covers you there as well. It creates virtual local presence of your business with local numbers in cities where you don’t have physical presence. For example, if your office is located at Los Angeles, SIP Trunking creates local numbers for Dallas, New York, Miami, etc., and redirects them to your Los Angeles office.
Our system works easily with Asterisk, NEC, Elastix, FreePBX, 3CX, Allworx, SwitchVox, Ips Mars, TrixBox, Cisco and so many others.
With a SIP Trunking, you need to figure out how many “concurrent” calls will be made on daily basis, and then buy an appropriate number of trunks. For example, your company has 20 employees, and you only expect about 8 people to be on a call at any given time. In that case, you should buy 10 SIP lines, leaving some room for adjustment, if ever needed.

Contact Us

Want a quote or more information? Feel free to contact us.

(888) 60 STRATUS - (888) 607-8728
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