Control & data sovereignty
On-premise phone system for business
Your data, always-on encryption, no cloud dependency.
Pentacomm runs on your hardware or in your private cloud — an appliance you own, with PBX, call center and compliant recording. Calls, recordings and customer data stay within your perimeter, under your control. No third-party cloud component on the call path.
The problem
“Cloud only” isn't the only option — and not always the right one.
The market pushes everything to the cloud, but for many businesses telephony data — recordings, numbers, customer data — has no place on someone else's infrastructure. Regulation in finance, healthcare and the public sector, data-sovereignty requirements, or simply the desire for control make on-premise the right choice. The problem: most vendors frame on-premise as “expensive and outdated”, because their business model is the cloud subscription.
Pentacomm looks different: a modern appliance, on-premises or in a private cloud, with the same features you'd expect from a cloud platform — one install, a web console, tested releases — but with your data fully in-house and encryption that can't be turned off.
Why on-premise
Full control, no compromise on features
The same capabilities as a modern cloud platform — but under your control.
- Data never leaves your perimeter — Calls, recordings and customer data on your hardware or in a private cloud; nothing passes through a third-party cloud.
- Always-on encryption — TLS for signaling and DTLS-SRTP for media, mandatory, under your control.
- Sovereignty & compliance — Fit for finance, healthcare and the public sector: on-premise control, GDPR compliance and a full audit trail.
- One appliance, the whole stack — PBX, call center, SBC, recording and firewall / IPS in one install, managed from a web console.
- No vendor lock-in — Open SIP and WebRTC: keep your carriers, numbers and phones; you're not tied to any vendor's roadmap.
- Predictable cost — You own the platform — no ever-growing monthly per-user subscription.
- Modern to operate — A single install with a first-boot wizard stands up the whole stack; tested releases via a managed package channel.
- Runs anywhere — Bare-metal, VM (VMware / Proxmox / KVM) or your private cloud — you choose where the data lives.
Comparison
On-premise vs. cloud PBX (SaaS)
The same telephony features — the difference is where the data lives and who controls the platform.
| Criterion | Cloud PBX (public SaaS) | Pentacomm (on-premise / private cloud) |
|---|---|---|
| Where the data lives | On the vendor's infrastructure, in locations you don't control. | Within your perimeter — on your hardware or in your private cloud. |
| Control & access | The vendor has technical access to the platform and potentially the data. | You own and manage the appliance; we don't access your calls or recordings. |
| Encryption | Variable; depends on the vendor and plan. | Mandatory end to end (TLS + DTLS-SRTP), under your control. |
| Sovereignty & regulation | May raise data-residency and compliance concerns. | Data stays under your jurisdiction and control — fit for regulated sectors. |
| Cost model | Recurring monthly subscription, usually per user. | You own the platform; modular licensing bound to the appliance. |
| Vendor lock-in | Migration can be hard; data and config in the vendor's format. | Open SIP and WebRTC — keep your carriers, numbers and phones. |
| If the internet goes down | Depends on the connection to the vendor's cloud. | Internal calls and local trunk calls can keep working on your network even if the internet is down. |
The bottom line
The same features as the cloud — but your data stays with you, encrypted, under your control. That's a modern on-premise phone system.
Frequently asked
On-premise phone system
What is an on-premise phone system?
It's a phone system that runs on your infrastructure — on a server at your site or in your private cloud — not on a vendor's infrastructure. You own the platform, and calls and data stay within your perimeter.
On-premise vs cloud: which is safer for company data?
On-premise gives you full control: data never leaves your perimeter and stays under your control. For businesses in regulated sectors or with data-sovereignty requirements, that's often the deciding argument. Pentacomm adds mandatory encryption on top of that control.
Can I run Pentacomm in a private cloud, not just on my own hardware?
Yes. Pentacomm runs bare-metal, as a virtual machine (VMware, Proxmox, KVM) or in your private cloud. “On-premise” here means “under your control”, wherever you choose to host it.
Do I lose features compared to a cloud solution?
No. You get PBX, integrated call center, SBC, compliant recording and firewall — in one appliance, with a web console and tested releases, just like a modern cloud platform.
What happens to calls if the internet goes down?
Because the platform runs on your side, internal calls and calls over local trunks can keep working on your network even when the internet connection is down — unlike a fully cloud solution.
Am I tied to a single vendor?
No. Pentacomm uses open SIP and WebRTC, so you keep your carriers, numbers and compliant phones. There is no proprietary protocol-level lock-in.
Want your telephony data fully in-house?
Talk to us about an on-premise or private-cloud proof-of-concept — or about early pilot access. We'll show you the platform running wherever you choose.
Contact us for early access