05/28/2026
VoIP call quality checklist (WiFi vs wired, VLANs, QoS in plain English)
Bad call quality is usually not the phone. It is the network.
Quick checklist to fix the most common issues:
• Use wired internet for phones when you can. WiFi is shared airspace. Wired is consistent.
• If you must use WiFi, use 5 GHz and strong signal. Weak signal equals choppy audio.
• Separate voice traffic from everything else with a VLAN. Plain English: put phone calls in their own lane so Netflix and updates do not cut in line.
• Turn on QoS for voice. Plain English: tell your network, “phone calls go first.”
• Watch for upload problems. VoIP needs steady upload, not just download.
• Avoid double NAT and cheap routers in the middle. Those create delay, jitter, and one way audio.
• Keep switches and access points updated. Old firmware causes random problems that look like “VoIP issues.”
• Run a simple speed test during business hours. If results swing a lot, your calls will too.
Want a call quality check? Send us a message and we will point you to the fastest fix.