People often assume VoIP needs a huge internet connection. It doesn't. A single call uses only a small, steady trickle of bandwidth — the things that actually matter are stability and how your network is set up, not raw download speed.
How much bandwidth a call actually uses
A typical VoIP call uses roughly 85–100 kbps in each direction — a tiny fraction of a modern connection. To put it in perspective, a single high-definition video stream can use dozens of times more than a voice call. So if your connection can stream video, it can almost certainly handle phone calls.
The simple way to estimate: multiply the number of simultaneous calls you expect by about 100 kbps up and down, then leave headroom for everything else your team does online. Most businesses are surprised by how little the phones actually need.
Rule of thumb: if your internet comfortably streams video today, it has plenty of room for your calls.
Why stability beats speed
Voice is real-time, so consistency matters more than peak speed. Three network measures affect call quality:
- Latency — the delay before audio arrives. High latency causes that awkward talking-over-each-other feeling.
- Jitter — variation in that delay. Too much and audio gets choppy.
- Packet loss — bits of audio that never arrive, heard as dropouts.
A fast connection with high jitter can sound worse than a modest, rock-steady one. That's why setup matters more than a big speed number.
What makes calls sound great
- A wired connection for desk phones where possible, or strong Wi-Fi for apps.
- Quality of Service (QoS) that prioritizes voice traffic on your network.
- Enough headroom so a big upload doesn't crowd out calls.
- A modern router configured for voice.
These are exactly the things a managed setup takes care of. We review your connection and network during onboarding and configure the system so calls are clear from day one.
Not sure if your internet is up to it? We'll assess your connection as part of your quote and tell you honestly what to expect. Ask us →