What in the World does QoS have to do with VoIP?

Ring, Ring! That's the sound of a client calling with voice quality issues.

Choppy audio, dropped calls, and one-way audio are common complaints when Quality of Service (QoS) and Bandwidth Management (BWM) are not properly configured on the network. VoIP is real-time and sensitive to delay, jitter, and packet loss. Without QoS, voice traffic competes with email, web browsing, and file downloads—and often loses.

Think of your network like a highway. Without QoS, voice packets are just another car in traffic, stuck behind large data transfers. QoS gives voice traffic a dedicated lane—or at least priority—so calls get through smoothly.

Here's a simple rule of thumb: each active VoIP call needs roughly 75 kbps of bandwidth. That's not much, but it must be consistent. If other applications consume available bandwidth, voice quality suffers. BWM helps ensure that voice gets the bandwidth it needs, even when the network is busy.

Another way to think about it: if data is like ordering a pizza for delivery (a few minutes late is fine), voice is like a pizza you're eating right now (it has to be there when you need it).

Configure QoS and BWM on your routers and switches to prioritize voice traffic. Your clients—and their callers—will thank you.

For help articles covering this topic and many others, visit help.cytracom.com.