Comparison
Cloud vs On-Premise Call Handling
Many Singapore businesses still run a PABX in a cupboard. Whether that matters depends less on the hardware than on what you need the phone system to do next.
What to establish first
- Whether your system supports SIP trunking
- Who maintains it and how responsive they are
- Whether numbers can be ported or forwarded
- What happens to calls if the site loses power
- Whether the vendor still supports the hardware
You Probably Do Not Need to Replace It
The common assumption is that adding AI call handling requires ripping out the existing phone system. In most cases it does not. Forwarding rules on your current setup are usually enough to route the calls you want handled.
That matters commercially. Replacing a working PABX is expensive, disruptive and involves retraining everyone who uses a handset, none of which is necessary just to answer overflow calls differently.
Where older systems do constrain things is in what they can report. Legacy hardware often cannot tell you how many calls went unanswered, which makes the business case harder to build.
Side by Side
| Criterion | On-premise PABX | Cloud telephony |
|---|---|---|
| Capital cost | Already spent | None, subscription based |
| Adding capacity | Hardware or licence changes | Configuration |
| Reporting on unanswered calls | Often limited | Standard |
| Remote and mobile staff | Requires additional work | Native |
| Site outage behaviour | Calls may fail entirely | Reroutes automatically |
| Integration with AI handling | Via forwarding or SIP | Direct |
| Ongoing maintenance | Your provider or in-house | Included |
| Dependence on internet quality | Lower | Higher, needs decent connectivity |
| Control over infrastructure | Complete | Delegated to the provider |
Where Each One Wins
Keep your on-premise system when
- It works and is still supported
- Forwarding rules meet your needs
- Staff are trained on the handsets
- Connectivity at the site is unreliable
- Replacement cost cannot be justified now
Move to cloud when
- The hardware is out of support
- You cannot get reporting on missed calls
- Staff work remotely or across sites
- Adding capacity requires hardware changes
- You are opening new locations
The Practical Sequence
Start with forwarding from whatever you have today. It requires no infrastructure change and lets you measure the benefit before making any larger commitment.
If the deployment proves itself and your telephony is genuinely limiting, migrate then. Doing both at once means that when something goes wrong, you cannot tell which change caused it.
The integration options are described under phone system integration.
Questions People Ask
Do we have to change our phone system?
Usually not. Forwarding from your existing setup is the normal starting point.
Can we keep our number?
Yes. Numbers are retained and forwarded rather than replaced.
What if our PABX is very old?
If it supports basic call forwarding, it will generally work. We check during scoping.
Should we migrate to cloud first?
Only if telephony is already causing problems. Otherwise change one thing at a time.
What happens if our internet fails?
Forwarding happens at the network level rather than on your premises, so calls still route. We confirm the specifics for your setup.
Start With What You Already Have
Tell us what is in the cupboard. We will confirm whether forwarding is enough before anyone discusses replacing it.