Cloud Phone Systems
SIP Trunking for Your Existing Phone System
Vulcan Telecom SIP trunking connects the phone system you already own to our carrier-class voice network over your internet connection – replacing traditional phone lines with savings of up to 40%.

What is a SIP trunk?
SIP (Session Initiation Protocol) is the standard that voice over IP uses to set up calls. A SIP trunk is a virtual phone line delivered over a broadband connection instead of copper lines from the phone company. Your on-premises phone system (PBX) connects to Vulcan's voice network, and your calls travel over the internet.
SIP trunking or hosted PBX?
If your phone system is recent and paid for, SIP trunking lets you keep it and cut the cost of the lines. If the phone system itself is old, a hosted VoIP phone system usually makes more sense: the phone system moves to the cloud and there is no equipment to maintain on site. We will tell you honestly which fits your situation.
Plans for any size business
From small businesses looking for the flexibility and cost savings of VoIP to mid-sized businesses that want business continuity, disaster recovery and unlimited calling, Vulcan has a SIP trunking plan to fit. Call (205) 699-8090 and ask for an account executive to talk through the options.
SIP Trunking
What SIP trunking gives you
Lower line costs
Up to 40% savings over traditional telephone lines.
Keep your phone system
Connect the PBX you already own.
Keep your numbers
Your existing numbers ported to the trunk.
Business continuity
Calls can be rerouted if your office or connection goes down.
“My company has worked with Vulcan Telecom for years. Keith and Joseph and everyone at Vulcan have always been prompt to respond to all of our questions and crazy situations.”
“I’ve used Vulcan Telecom for a large medical office telecom project. Large or small they are down to earth and easy to talk to. Keep everything in real terms. I’ve moved 300 miles away but Ive still consulted with Vulcan about issues I couldn’t get resolved by local vendors. Great service”
“Stared using Vulcan telecommunication. I was tired of the big box names making false promises. Vulcan has been so easy to deal with always love Working with a business that enjoys working with other businesses. I would highly recommend contacting them for all your telecommunication needs.”
“Superb customer service! Keith returns phone calls promptly and answered all of my questions about converting to the new system. I was very pleased with the pricing and the ease of transition!”
“From the moment I reached out, their customer service was top-notch—friendly, knowledgeable, and genuinely helpful. The service exceeded my expectations and is highly recommendable. If anyone is looking for quality, reliability, and great customer care, they truly go above and beyond!”
“We have used Vulcan for years for our dermatology practice. They are excellent. Always respond asap . Very easy to work with and great customer service !!”
FAQ
SIP Trunking questions
Will SIP trunking work with my phone system?
Most modern IP-capable phone systems support SIP trunks. Older systems may need a gateway. Tell us the make and model and we will check.
How much can I save?
Compared with traditional telephone lines, SIP trunking offers up to 40% savings, depending on your current lines and calling.
Should I choose SIP trunking or a hosted phone system?
If your phone system is recent, SIP trunking keeps it and cuts line costs. If it is old or hard to maintain, a hosted phone system is usually the better choice.
Free quote
Planning a project? Let’s talk it through.
Tell us briefly what you need – new cabling, a phone system or IT help. We’ll get back to you, or just call – a real person answers.
- Call us(205) 699-8090

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