Alternatives Guide
ISDN Alternatives — Migrate to Cloud Phone Systems
ISDN (Integrated Services Digital Network) is being progressively shut down across Australia as the NBN rollout continues. If your business still relies on ISDN lines, now is the time to plan your migration to a modern cloud phone system.
Why businesses are switching from ISDN
- ISDN infrastructure is being decommissioned — no long-term viability
- High line rental and call charges vs VoIP
- No unified communications — voice only, no video or messaging
- Hardware-dependent with expensive maintenance
Top ISDN alternatives
RingCentral
- Full PABX replacement
- Zero on-premise hardware
- Seamless number porting
Microsoft Teams Phone
- Direct Routing for ISDN migration
- Works with existing M365
- Managed migration support
Zoom Phone
- Fast deployment
- Low per-user cost
- BYOD friendly
8x8
- Multi-site support
- Built-in contact centre
- SIP trunking options
Frequently asked questions
When is ISDN being switched off?
Telstra and NBN Co are progressively disconnecting ISDN services. Most areas will lose ISDN availability by 2027. It's best to migrate before your area is affected.
Can I keep my ISDN phone numbers?
Yes. You can port your existing ISDN numbers to any major VoIP or UCaaS provider. The process is well-established.
What equipment do I need?
Most cloud phone systems work with just an internet connection. You can use existing computers, smartphones, or purchase IP phones. Your old ISDN hardware won't be needed.
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