VitalPBX is heading to ClueCon 2026, and this year the team isn’t just attending — it’s on stage. Joseph Montes, of the VitalPBX engineering team, will present “Making a Class 4/Class 5 Environment Using FreeSWITCH w/ SW” on Tuesday, August 11, 2026, from 4:30 PM to 5:00 PM CT.
If you build, sell, or manage VoIP infrastructure — MSP, ITSP, system integrator, or carrier — this session (and VitalPBX’s presence at ClueCon in general) is worth your calendar. Here’s what the talk covers, why Class 4/Class 5 architecture matters, and how to catch VitalPBX in Chicago this August.
What Is ClueCon, and Why It Matters for the VoIP Industry
ClueCon is the annual conference built around FreeSWITCH and the real-time communications ecosystem, hosted by SignalWire. It draws the engineers, carriers, and open-source maintainers who actually build the infrastructure behind modern VoIP, SIP trunking, and — increasingly — voice AI. The 2026 agenda spans four days of technical sessions covering FreeSWITCH internals, Kamailio and OpenSIPS engineering, SIP security, carrier billing, and the fast-moving world of real-time voice AI.
It’s not a vendor trade show. It’s a room full of the people who keep the phone network running, which makes it one of the most credible stages in the industry for a deep technical talk.
The Session: Making a Class 4/Class 5 Environment Using FreeSWITCH w/ SW
Joseph Montes’s session is scheduled for the final afternoon slot on Tuesday, August 11 — a 30-minute walkthrough of building a combined Class 4/Class 5 environment on FreeSWITCH, referencing SignalWire (SW), the company behind FreeSWITCH and the host of ClueCon.
Session details:
- Speaker: Joseph Montes
- Date: Tuesday, August 11, 2026
- Time: 4:30 PM – 5:00 PM CT
- Event: ClueCon 2026
This is exactly the kind of session that resonates with the audience VitalPBX builds for: MSPs and ITSPs who need infrastructure that can handle wholesale carrier traffic and local subscriber services without duct-taping two separate platforms together.
What “Class 4” and “Class 5” Actually Mean
If you’re newer to telecom terminology, these terms come from the traditional switched telephone network but still describe two distinct jobs a VoIP platform can perform:
- Class 4 switching handles wholesale, carrier-to-carrier call routing — moving large volumes of traffic between networks, least-cost routing, and interconnection with other providers. Think of it as the backbone layer.
- Class 5 switching handles the end-user layer — extensions, voicemail, IVRs, call queues, and the day-to-day features a business or subscriber actually interacts with.
Historically, carriers ran these as separate systems. Building both on the same open-source real-time communications stack — the subject of Joseph’s talk — is a more efficient, more flexible approach, and it’s exactly the kind of architecture that matters to VoIP providers scaling past a single tenant or a single customer.
Why This Matters for the MSPs and ITSPs VitalPBX Serves
VitalPBX is built on Asterisk, not FreeSWITCH — but the architectural challenge Joseph is presenting on is one VitalPBX customers deal with constantly. VitalPBX’s own Multi-Tenant plan exists to solve a version of this same problem: giving resellers, MSPs, and ITSPs a way to host multiple independent PBX environments — and route carrier-grade trunk traffic into them — from a single server, without the per-instance server sprawl that platforms like 3CX require.
Having a VitalPBX engineer presenting original technical work at ClueCon says something about the depth of engineering behind the product. This isn’t a marketing team repackaging someone else’s research — it’s the team that builds VitalPBX actively working through carrier-grade telephony architecture with the people who build the underlying open-source real-time communications tools. That’s the kind of technical credibility that doesn’t show up on a pricing page, but it’s exactly what system integrators and ITSPs are evaluating when they choose a platform to build their business on.
Where to Find Joseph Montes at ClueCon 2026
ClueCon 2026 runs Monday, August 10 through Thursday, August 13, with Joseph Montes’s session on Tuesday, August 11, from 4:30 PM to 5:00 PM CT. If you’re attending, that’s the slot to plan around. It’s also a good excuse to introduce yourself to the VitalPBX team in person — ask about the Multi-Tenant plan, the Sonata Suite, or anything else on the roadmap.
Full schedule details are available on the official ClueCon 2026 agenda.
Frequently Asked Questions
What is ClueCon 2026?
ClueCon is the annual real-time communications conference built around the FreeSWITCH project and hosted by SignalWire. It brings together engineers, carriers, and open-source contributors for technical sessions on VoIP, SIP infrastructure, telephony billing, and voice AI. The 2026 edition runs August 10–13 in Chicago.
When is VitalPBX speaking at ClueCon 2026?
VitalPBX’s Joseph Montes presents “Making a Class 4/Class 5 Environment Using FreeSWITCH w/ SW” on Tuesday, August 11, 2026, from 4:30 PM to 5:00 PM CT.
What is a Class 4/Class 5 environment in telephony?
Class 4 refers to wholesale, carrier-to-carrier switching — routing large volumes of calls between networks and providers. Class 5 refers to end-user telephony services like extensions, voicemail, and call queues. Combining both on a single platform lets a provider handle carrier-grade trunking and subscriber-facing features without running two separate systems.
Does VitalPBX use FreeSWITCH?
No. VitalPBX is built on Asterisk, the world’s most widely deployed open-source VoIP engine. Joseph Montes’s ClueCon session covers FreeSWITCH-based architecture as part of the broader open-source real-time communications community that ClueCon serves, not as a description of VitalPBX’s own technology stack.
Who is Joseph Montes?
Joseph Montes is a member of the VitalPBX engineering team, presenting original technical work on Class 4/Class 5 telephony architecture at ClueCon 2026.
How can I meet the VitalPBX team at ClueCon 2026?
Attend Joseph Montes’s session on Tuesday, August 11, from 4:30 PM to 5:00 PM CT, or look for the VitalPBX team throughout the conference at ClueCon’s networking events. If you can’t make it in person, you can still book a demo with the VitalPBX team.
Does VitalPBX support multi-tenant deployments like the ones discussed at ClueCon?
Yes. VitalPBX’s Multi-Tenant plan lets MSPs and ITSPs host multiple independent PBX instances on a single server — up to a practical limit of around 100 tenants per server due to the underlying Asterisk engine — without the one-server-per-instance requirement some competing platforms impose.
Want to see how VitalPBX handles carrier-grade, multi-tenant telephony for yourself? Compare VitalPBX plans or book a demo with the team.
