
VoIP sends calls over the internet or your network instead of old phone lines. An IP PBX or cloud phone system gives each person an extension, routes incoming calls to the right desk or group, supports voicemail and mobile apps, and lets branches share one system. It needs reliable internet and power backup to be dependable.
Key takeaways
- VoIP runs calls over your network.
- Extensions, call groups and voicemail come standard.
- Mobile apps let staff take office calls anywhere.
- Reliable internet and backup power are essential.
- Plan voice traffic on a good network.
01Options
| Option | Good for | Watch out for |
|---|---|---|
| Cloud phone system | Small offices, branches, mobile staff | Needs stable internet |
| On-site IP PBX | Larger offices wanting control | Hardware, power and support |
| Hybrid | Mix of on-site and cloud | More to manage |
| Mobile-only | Very small teams | No central routing or extensions |
02What good VoIP needs
- Switches with PoE for desk phones.
- Network settings that prioritise voice.
- A backup internet line.
- A UPS for the switch and router.
- Clear call-routing rules for reception and after hours.
03Plan your phones
04Frequently asked questions
Can I keep my existing number?
Number porting depends on your provider; we help check.
Will calls drop on a bad line?
Quality depends on your internet; we test the line and plan a backup.
Can staff use their phones?
Most systems offer a mobile app extension.


