Hire a practitioner who designs the SIP path, the media path and the product around them. Every Learn more page is a full brief — architecture, feasibility and the questions buyers (and AI search) actually ask.
UnifiedPBX.in is not a staffing bench that “does Asterisk.” It is an architecture-first practice for communication products: FreeSWITCH, Asterisk, FusionPBX, SIP trunks, AI voice agents, WebRTC softphones, custom CCaaS and multi-tenant SaaS, delivered remotely from Delhi to teams worldwide.
Search and answer engines reward pages that name failure modes — one-way audio, tenant leaks, model-owned transfers, registered-but-dead trunks. That is why each service below is a long-form page with a diagram, not a four-card stub.
Send the current architecture, a pcap, or a product idea. The first reply is whether the problem is signaling, media, tenancy or a vendor demo.
Discuss Your ProjectThe same five planes show up in almost every serious build. Services map to a plane — they are not a random menu.
Custom dialplans, ESL, SIP routing, WebRTC, AI media bridges and multi-tenant cores that stay operable.
Learn more →PJSIP trunks, ARI/AGI applications, queues, AMI wallboards and migrations off chan_sip or hardware IPPBX.
Learn more →Domain tenancy, provisioning, custom apps and the WebRTC/one-way-audio class of production bugs.
Learn more →Trunk onboarding, DID workflows, RTP/SRTP, failover, fraud policy and hybrid CPaaS architectures.
Learn more →SIP-connected agents with barge-in, tool calling and PBX-owned transfer — a Vapi/Retell alternative when you must own the call.
Learn more →Browser softphones, SIP.js, ICE/TURN and click-to-call that survive corporate NAT.
Learn more →ACD, agent desktop, campaigns, recording and CRM — a custom alternative to Genesys, Five9 or Amazon Connect.
Learn more →React/admin UIs, Python/Node APIs and realtime events that are allowed to control calls.
Learn more →Isolation, billing hooks, white-label and a voice plane you can provision from an API.
Learn more →Linux, Docker, careful Kubernetes, SIP TLS, RTP-aware networking and monitoring that means “calls are dying.”
Learn more →Build vs buy, engine choice, AI feasibility and a written 90-day plan before you spend the year.
Learn more →| Need | Start here | Why |
|---|---|---|
| High-concurrency media, WebRTC, ESL product | FreeSWITCH | Media fabric + programmable control |
| Classic PBX, queues, ARI/AGI apps | Asterisk | Huge ecosystem, fast for ACD-centric builds |
| Hosted PBX GUI + tenants quickly | FusionPBX | Admin plane on FreeSWITCH |
| LLM on real phone calls | AI Voice | Model never owns SIP |
| Sell seats / minutes | SaaS | Control plane + voice plane |
A practical technical discussion focused on architecture and the first production test — not a generic sales deck.