Software-Based VoIP

SOFTWARE-BASED VOIPAND IP PBX

Software-based VoIP and IP PBX systems run on standard server hardware or virtual machines, giving you full control over your phone system without proprietary hardware lock-in. PTG deploys and manages Asterisk, FreePBX, and 3CX for Raleigh-Durham businesses that want enterprise telephony features with maximum flexibility and lower total cost of ownership. With 24+ years of telecom experience, our engineers design systems that scale from ten seats to hundreds.

CMMC Registered Practitioner Org|BBB A+ Since 2003|24+ Years Experience
Advantages

Why Software-Based Phone Systems

Software PBX platforms eliminate the cost and rigidity of proprietary phone systems while delivering the same enterprise features your business requires.

No Proprietary Hardware

Run your phone system on standard servers, virtual machines, or cloud instances. You are never locked into a single vendor's hardware lifecycle or forced upgrade schedule. When your server needs more capacity, you add RAM and CPU rather than buying a new appliance.

Open-Source Options

Asterisk and FreePBX eliminate per-seat licensing fees entirely. Organizations running fifty or more extensions can save thousands per year compared to subscription-based cloud platforms. Invest those savings in professional deployment and managed support instead of recurring license costs.

Full Customization

Build call flows, IVR menus, and API integrations exactly the way your business needs them. Connect your phone system to your CRM, helpdesk, or ERP with custom dialplan logic. Software PBX gives you full access to configuration files and call routing rules with no vendor-imposed limitations.

Managed by PTG

Get open-source savings without DIY risk. PTG handles initial deployment, security hardening, OS and PBX patching, proactive monitoring, and 24/7 support. Our team led by Craig Petronella (CCNA, CWNE) has deployed software PBX platforms for organizations across healthcare, legal, manufacturing, and government contracting.

Platforms

Supported Software PBX Platforms

Open-Source

  • Asterisk -- the most widely deployed open-source PBX engine, powering millions of lines worldwide with full SIP, IAX2, and WebRTC support
  • FreePBX -- web-based GUI for Asterisk that simplifies administration while preserving full dialplan customization for advanced users
  • FusionPBX -- FreeSWITCH-based platform for multi-tenant deployments and high-availability clustered environments

Commercial Software

  • 3CX -- Linux or Windows based PBX with built-in video conferencing, live chat, and Microsoft 365 integration at competitive per-user pricing
  • Zultys MX -- unified communications platform with integrated contact center, MXIE client, and mobile app for on-premises or cloud deployment
  • Microsoft Teams Phone -- Direct Routing with SBC for organizations already invested in the Microsoft 365 ecosystem
Security

VoIP Security Built In

Every software PBX deployment includes security measures that protect your voice communications from eavesdropping, toll fraud, and unauthorized access.

Encrypted Voice

SIP TLS for signaling and SRTP for media encryption ensure that call audio cannot be intercepted in transit. PTG configures certificate-based authentication between endpoints and trunks for defense in depth.

Toll Fraud Prevention

Intrusion detection, fail2ban rules, geo-IP blocking, and call rate limiting prevent unauthorized international calls that can cost thousands overnight. PTG monitors SIP registration attempts and blocks brute-force attacks in real time.

FAQ

Software VoIP Questions

What platforms does PTG support?

PTG deploys and manages Asterisk, FreePBX, 3CX, FusionPBX, Zultys MX, and Microsoft Teams Phone with Direct Routing. We recommend the right platform based on your feature needs, user count, compliance requirements, and budget.

Is software-based VoIP reliable?

Yes. When deployed on enterprise hardware with RAID storage, redundant power, and proactive monitoring, software PBX systems deliver 99.99% uptime matching or exceeding proprietary platforms at a fraction of the cost.

Can we use any SIP phones?

Yes. Software-based systems support any SIP-compliant phone including Yealink, Poly, Cisco, and Grandstream. PTG recommends phones that best match your platform and provisions them with zero-touch auto-configuration so new handsets are ready in minutes.

How does PTG handle updates and patches?

PTG manages patching on a regular schedule with staged rollouts, testing in a lab environment before applying to production, and automated rollback if any issue is detected. Security patches are applied within 48 hours of release for critical vulnerabilities.

Can a software PBX integrate with Teams or Zoom?

Yes. PTG configures SIP trunk interconnects, WebRTC gateways, and direct routing so your software PBX can interoperate with Microsoft Teams, Zoom Phone, and other cloud collaboration platforms. Users can dial between systems seamlessly.

Get Started

Ready for Software-Based VoIP?

Contact PTG for a free assessment and platform recommendation. We evaluate your infrastructure, compare options, and present a solution tailored to your business.