Formula
Concurrent Calls x
Codec BW (full duplex + overhead) =
Site Bandwidth then sum all sites =
Aggregate Total
Step 1
Select audio codec
G.711 is recommended for production voice quality. Opus is the default
for Teams and Webex. Additional codecs coming soon.
Recommended
G.711u / G.711a
64 kbps payload · 87.2 kbps per call (full duplex + overhead)
Teams · Webex
Opus
60 kbps payload · 92 kbps per call (wideband, full duplex +
overhead)
Coming soon
G.722
64 kbps payload · wideband HD voice
Coming soon
G.729
8 kbps payload · compressed, low-BW links
Step 2
Add your sites
Enter peak concurrent calls — your busiest moment, not total
employees.
Results
Bandwidth requirements
Add at least one site to see results
QoS Requirement
These bandwidth figures represent voice traffic only. QoS must be configured across all network devices handling voice — routers, switches, firewalls, and WAN edges. Without proper DSCP marking and queue prioritization, voice will compete with bulk data traffic regardless of available bandwidth. Use the QoS & DSCP Planning Tool to generate your policy configuration.