Voice over Internet Protocol (VoIP) has become the go-to communication system for businesses, replacing analog phone lines, ISDN, and SIP trunking.
The shift to Cloud VoIP eliminates on-premise PBX systems, offering scalability, mobility, and IT integration.
If you’re unsure whether it’s the right fit, start with these questions to ask yourself and your provider when exploring a VoIP system.
How Cloud VoIP Compares to Traditional Phone Systems
✅ Cloud VoIP eliminates hunting lines entirely—we manage all calls in the cloud without needing physical infrastructure.
✅ Cloud VoIP still uses blocks of 10 numbers but removes the need for on-premise PBX hardware. You can learn more about this setup in our guide on how number porting works in VoIP systems.
1. Analog Phone Lines (POTS – Plain Old Telephone Service)
- Uses copper wires and requires RJ11 connections.
- Limited to one call per line unless supplemented with hunting lines.
- Requires an on-premise PBX for internal call management.
2. ISDN (Integrated Services Digital Network)
- Supports multiple concurrent calls over a single connection.
- Provided in blocks of 10 consecutive numbers (e.g., XXXX 7800 – XXXX 7809).
- Requires an on-premise PBX system.
Cloud VoIP – The Future of Business Communications
With Cloud VoIP, businesses no longer need on-premise PBX systems or physical phone lines.
Instead, the cloud manages everything, offering:
✔ Fully Hosted PBX (No On-Site Hardware Required)
- Call handling, voicemail, IVR, and call routing are all managed in the cloud.
- No physical PBX maintenance or infrastructure costs.
- We recommend only trusted VoIP service providers to deploy a secure VoIP server in the cloud.
✔ Internet-Enabled VoIP Phones
- Desk phones from Fanvil connect to the Cloud VoIP system.
- Fanvil VoIP phones provide high-quality audio, colour displays, and advanced call management features.
- Popular models include the Fanvil X series (X3, X4, X5, X6) and Fanvil V series for executive and video calling needs.
✔ Scalability & Remote Work Readiness
- Businesses can add or remove users instantly, without installing new lines.
- Teams can work from anywhere in the world with internet access.
✔ Security & Business Continuity
- Cloud VoIP providers offer geo-redundant data centre for uptime protection.
- End-to-end encryption ensures secure communication.
✔ Cloud VoIP Still Uses Blocks of 10 Numbers
- Just like ISDN, businesses still receive DID numbers in blocks of 10.
- Mainline and direct dial extensions for employees are assigned from these blocks
Why Businesses in Singapore Are Moving to Cloud VoIP
Before
Imagine your business phone system is like an old-school landline at home.
You had to plug a physical telephone into the wall to make calls. If your business needed more phones, you had to install more physical phone lines, which took time and money.
Current
Instead of using physical wires, your business phones connect to the internet.
This means:
✔ No more expensive phone lines—you only need a stable internet connection.
✔ Your business number works from anywhere—whether in the office, at home, or overseas.
✔ You still get blocks of 10 numbers (like before), but calls are handled by a Cloud PBX, which means no more on-premise PBX hardware.
✔ Employees can answer calls using Fanvil VoIP phones, mobile apps, or laptops—no need to be stuck at a desk.
If your business is still using old ISDN phone lines, switching to Cloud VoIP ensures your numbers stay the same while giving you more flexibility and lower cost
The Bottom Line
Cloud VoIP is cheaper, more flexible, and future-proof. Your calls still work the same way—but now, you don’t need expensive equipment to manage them.
Our Expertise
At OIT Pte Ltd, we specialise in VoIP consulting and IT support—helping businesses transition to Cloud VoIP solutions that are secure, compliant, and optimised for business operations.
While VoIP reselling in Singapore requires a license, we do not resell VoIP services.
Instead, we provide technical expertise, system setup, troubleshooting, and strategic advisory services to ensure businesses implement the right Cloud VoIP solution.
For businesses still using analog lines, ISDN, or SIP trunking, it’s time to fully migrate to Cloud VoIP and let the cloud handle the rest.
Key VoIP Considerations for Businesses in Singapore
VoIP Telephone Systems: How Number Porting Works
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