VoIP is the right call for most small businesses — lower cost, more features, more flexibility. I recommend it constantly. But I also see what happens when people deploy it on a network that isn't ready, and it is not pretty. Choppy calls. Dropped connections. Angry clients. Frustrated staff. A VoIP system that gets blamed for problems that are actually the network's fault.
Before you make the switch, your network needs a readiness check. Here are five signs it's not ready yet — and what to do about each one.
Sign 1: You Have No QoS Configuration
QoS — Quality of Service — is how your router prioritizes different types of traffic. Without it, a large file download or a video upload can steal bandwidth from your voice calls and cause choppy audio. Your router has no idea that a phone call is more time-sensitive than a software update running in the background.
The fix: Log into your router and enable QoS. Set voice traffic (DSCP EF, or UDP traffic on common VoIP ports) to the highest priority queue. This alone resolves the majority of call quality complaints in environments where the internet connection itself is adequate.
Sign 2: Your Phones Are on the Same Network as Everything Else
When voice traffic and data traffic share the same network segment, they compete for resources and interfere with each other. A dedicated voice VLAN separates your phone traffic so it can be managed, prioritized, and secured independently.
This also matters for security — voice traffic sitting on the same VLAN as your general workstations creates unnecessary exposure. A properly configured voice VLAN keeps things clean.
Sign 3: SIP ALG Is Enabled on Your Router
I've written a whole post about this — go read it if you haven't — but the short version is: SIP ALG is a router feature that was designed to help VoIP and almost always breaks it instead. If it's enabled, disable it. This is non-negotiable.
Sign 4: Your Jitter or Latency Numbers Are Too High
VoIP is extremely sensitive to two things that your regular internet usage mostly ignores: jitter and latency.
- ▸Latency (ping): should be under 150ms for VoIP — ideally under 20ms on your LAN
- ▸Jitter: should be under 30ms — jitter above this causes the robotic, choppy audio quality
- ▸Packet loss: should be under 1% — even 2% packet loss causes audible gaps in speech
Run a VoIP readiness test using a tool like the Nextiva Speed Test, PingPlotter, or simply a sustained ping test to your VoIP provider's server. If your numbers are out of range, the issue is usually your ISP connection, your router, or network congestion — all of which are addressable.
Sign 5: You're Using a Consumer-Grade Router
That $80 router from the big-box store is fine for home use. For a business running VoIP, it's often the weakest link in the chain. Consumer routers frequently have: inadequate QoS controls, SIP ALG that can't be properly disabled, insufficient NAT table capacity for multiple concurrent calls, and no VLAN support.
A business-grade router — from Fortinet, SonicWall, Ubiquiti, or Cisco — gives you proper QoS, VLAN support, and the controls you need to make VoIP work reliably. It's not as glamorous as the phone system itself, but it's the foundation everything else sits on.
Intecha's TakeDon't wait until after you deploy VoIP to discover your network isn't ready. A pre-deployment network assessment takes a few hours and prevents weeks of troubleshooting. NeedIT offers VoIP Network Assessment & Optimization as a standalone service — it's exactly this, done right.
The Bottom Line
A great VoIP system on a bad network is just a bad phone system with a higher expectation attached to it. Get the foundation right first, and the system will perform the way it's supposed to. Your staff will thank you. Your clients will thank you. And you won't have to call your VoIP provider to hear 'everything looks fine on our end' for the fourth time.