Someone searching migrate off hardware IPPBX or chan_sip to PJSIP is already in a buying situation. UnifiedPBX.in treats migration as architecture plus cut-over, not a weekend rewrite of the dialplan into a new GUI.
2026 buying brief
Who this is for
Operators stuck on a hardware box, chan_sip, a vendor-locked UCaaS or an Asterisk that nobody wants to touch.
What you get
Inventory, target architecture, dual-run plan and the first production test on the new path.
Searches this page answers
IPPBX to cloud, chan_sip migration, Asterisk to FreeSWITCH, add AI voice to existing PBX.
Typical moves
From what you have
LegacyHardware IPPBX · chan_sip · suite lock-in
↓
Parallel runDIDs · phones · trunks · recordings
↓
TargetSoftware PBX · PJSIP · cloud/VPC · APIs
↓
Optional next planeAI voice · SaaS tenancy · WebRTC
Cut the number when the new path has answered the same calls the old path answered.
What we migrate
Hardware IPPBX → software / cloud
Keep numbers; retire the appliance.
chan_sip → PJSIP
The migration Asterisk already told you to do.
Engine moves
Asterisk ↔ FreeSWITCH when the product needs a different media story.
Existing PBX → AI voice
Model on the same trunk, PBX still owns transfer.
Legacy app → SaaS
Tenants, billing, RBAC around a voice plane that already works.
Locked UCaaS → owned core
Hybrid first if the bill is the problem, not the handsets.
FAQ
Questions buyers ask before hiring
Direct answers on scope, stack, rescue vs build, and how to start, structured for search and AI summaries.
Direct answers on scope, stack, rescue vs build, and how to start, structured for search and AI summaries.
Consulting produces decision records, diagrams and risk lists you can hand to any team. Development includes the same clarity plus implementation, tests and production cutover.
Yes. Reviews cover tenant leakage, trunk security, recording paths and whether the gap is configuration or product architecture.
Yes. Fractional blocks suit teams that need senior telecom review without a full-time hire.
REGISTER only proves the trunk credentials. INVITE, identity headers, codec offers, RTP pinholes and carrier-specific IMS rules still have to pass. Indian PSU and PRI-over-SIP profiles are a common example, see SIP registered but no calls.
Use CPaaS when volume is low and speed matters. Own SIP when margin, recording locality, custom routing or multi-tenant resale is the product. Hybrid designs are normal in 2026.
Yes. We work from pcaps and SDP: NAT, security groups that open 5060 but not RTP, transcoding, ICE/TURN and REFER/re-INVITE behaviour, not guesswork.
Share the current stack (PBX, CRM, cloud), the failure or goal in one paragraph, peak call volume, carriers, and any deadline. Screenshots, a pcap, or a short Loom beat a 40-page RFP. Use the project brief
Yes. Delivery is remote-first from Delhi with scheduled overlap for EU, UK, US and APAC stand-ups. Production changes use written runbooks, rollback steps and agreed maintenance windows.
Yes. Many engagements begin with a 1–2 week SIP trace review, tenant-isolation audit, or architecture assessment. If the fit is good, scope expands from evidence, not from a generic sales deck.
Founders, CTOs, telecom leads, MSPs and product teams building or fixing UCaaS, CCaaS, CRM+voice, AI voice, or vertical SaaS, not buyers who only need seats on a mass-market suite.
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.