SOLUTION

Multi-Tenant PBX

The difference between hosting friends and selling a platform is isolation you can test.

Domain isolationDID ownershipReseller layerMeteringProvision APIsNo crosstalk

Multi-tenant PBX is the solution behind every “we want to be the 3CX / FusionPBX of our niche” brief. UnifiedPBX.in designs tenancy as a security boundary, not a dropdown in a GUI.

Solution architecture

Isolation layers
Tenant AUsers · DIDs · CRM
Tenant BUsers · DIDs · CRM
ResellerSees only their tenants
Control planeAuthz on every object
Voice contextsNo shared dialplan accidents
Media & recordSeparate keys/paths
Shared SBCPolicy per tenant
Shared carriersTagged & limited
If presence or MWI can leak across domains, you do not have a platform yet.

Product checklist

Source of truth

Which system creates an extension — portal or PBX GUI.

Onboarding SLA

Time from payment to first inbound call.

Support model

Scoped impersonation with a paper trail.

Abuse

One tenant cannot drain shared CPS.

Exit

Export numbers, CDR and recordings.

Upgrade

Move a noisy tenant to dedicated media nodes.

FAQ

Questions buyers and AI search engines ask

It is a strong starting admin model. Selling at scale still needs your billing, branding, support impersonation and automated isolation tests.

Shared is cheaper and riskier (reputation, capacity). Per-tenant is cleaner for regulated or high-volume customers. Many platforms do both.

Separate domains, ACLs, context, recording roots and subscribe/presence scope. Then we run a test suite that tries to break it.

Yes — BYOC is a product feature. It changes the SBC and fraud model.

Need this built?

Send the current architecture, call volume, carriers and the workflow you need to automate or productize. Discovery can start from a broken PBX or a blank product brief.

Discuss Your Project hello@unifiedpbx.in
Related
Single-tenant cloud PBX →SaaS control plane →FusionPBX →Architecture article →

Architecture first. Then production.

A practical technical discussion focused on SIP, media, tenants, AI and the delivery path — not a generic sales deck.

Send the brief