Migration Guide

PABX to Cloud Phone System Migration Guide

ConnectCX Advisory TeamPublished 10 March 2026· Updated 14 April 2026

Migrating from an on-premise PABX to a cloud phone system is one of the most impactful upgrades an Australian business can make. This guide walks through the entire process — from planning to go-live.

Typical timeline: 4–8 weeks for most businesses (1–100 users). Enterprise migrations may take 8–16 weeks.

Step-by-step process

Audit your current system

Document all phone numbers, extensions, call flows, IVR menus, and integrations. Note hardware that may be reusable (SIP-compatible phones).

Choose your cloud provider

Compare UCaaS providers based on features, pricing, and Australian support. Use our Free AI Phone Assessment. Answer 5 quick questions about your business. We'll recommend the right AI phone system for your needs — free, with no sales call required.

Plan number porting

Submit porting requests early — Australian number porting takes 5–10 business days. Keep your PABX running until ports complete.

Configure your new system

Set up users, call flows, auto-attendants, voicemail, and integrations in your new cloud platform. Most providers offer setup wizards.

Test thoroughly

Run parallel testing with key staff before cutting over. Test inbound calls, outbound calls, transfers, voicemail, and emergency services.

Go live & decommission

Cut over to the cloud system, verify all numbers are ported, and decommission your old PABX hardware.

Benefits

Eliminate hardware maintenance costs (typically $2,000–$10,000/year)
Enable remote and hybrid work instantly
Access AI features: auto-attendant, call analytics, transcription
Scale up or down without hardware changes
Automatic updates and security patches

Watch out for

Incomplete number porting can cause missed calls — start porting early
Internet bandwidth issues — ensure adequate upload speed (100kbps per concurrent call)
Staff resistance — provide training and highlight mobile/remote benefits
Emergency calling (000) — verify your provider supports Australian emergency services

Frequently asked questions

How much does migration cost?

Most cloud providers include migration support in their plans. You'll pay per-user monthly fees ($15–45/user) instead of PABX maintenance. ROI is typically seen within 6–12 months.

Can I keep my existing phone numbers?

Yes. All major UCaaS providers support Australian number porting from PABX systems. Geographic, 1300, and 1800 numbers can all be ported.

Do I need new desk phones?

Not necessarily. SIP-compatible phones (Cisco, Poly, Yealink) often work with cloud systems. Many businesses switch to softphones (computer/mobile apps) entirely.

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