When we build a new phone system, the first step is to sit down with the business and map out how it actually works. Who answers calls? Where do they go if no one picks up? What happens after hours? Does reception need to see who's on a call?
Despite the dozens of features a modern VoIP system offers, the vast majority of our customers rely on the same five core features day-to-day. Here they are — and why they matter.
1. Ring Groups (Hunt Groups)
Ring groups are the most fundamental building block of almost every business phone system. When a call comes in, a ring group rings multiple handsets simultaneously (or sequentially, or a mix of both) until someone answers. If nobody does, the call is redirected — to voicemail, to another ring group, to a mobile, or to an after-hours message.
Ring groups can also display a different name on the handset screen (so the receptionist knows whether to answer as "Sales" or "Support"), play hold music, enable call recording, and carry any number of other settings.
Most businesses have at least two or three ring groups. Larger organisations may have dozens — one per department, per location, or per call type.
2. Call Parking
This one requires a quick explanation because it's different from how traditional phone systems worked.
Old phone systems operated on physical "lines" — when a call came in on Line 1, you could put it on hold and someone else could pick up Line 1 on their handset. VoIP doesn't work that way. Every call is an individual session, not a line.
Call parking solves this. Park buttons on handsets (Park 1, Park 2, etc.) have indicator lights. When you park a call in Park 1, the Park 1 light turns on across every phone in the office. Any staff member can pick up that call from any handset just by pressing the lit Park 1 button. It's exactly how you'd expect a modern office phone to behave.
3. Voicemail and Voicemail-to-Email
Standard voicemail works exactly as you'd expect — callers leave a message when no one answers. But voicemail-to-email is where things get useful.
When voicemail-to-email is enabled, every message is automatically transcribed (or recorded as an audio file) and emailed to the relevant person. Staff can listen to messages from their inbox, forward them, archive them, and access them from anywhere. For remote workers or anyone frequently away from their desk, it's enormously practical.
4. Night Mode and Time Conditions
Every business needs to handle calls differently after hours. VoIP systems do this in two ways:
Night mode is a manual button on a handset — green means open, red means closed. Reception presses it at the end of the day and calls are redirected to an after-hours message or voicemail. Press it again in the morning and you're back to normal.
Time conditions are automated. You define your business hours, and the system automatically routes calls according to whether it's currently within or outside those hours. No one has to remember to press the button.
Most businesses use a combination of both — time conditions as the default, night mode as an override for unexpected closures or early finishes.
5. The Expander Module
For reception desks and call-heavy roles, the standard handset isn't enough. An expander module attaches to the phone and provides additional pages of BLF (Busy Lamp Field) keys.
Each BLF key shows the live status of an extension — available, on a call, or do-not-disturb — and can be pressed to call that extension, transfer a call, or check park status. A receptionist with a well-configured expander can manage the entire office's call traffic at a glance.