Gratuit · Réseau et infrastructure IT
Calculateur de bande passante VoIP.
Calculez la bande passante des appels VoIP en G.711, G.722, G.729, G.723.1, iLBC et Opus avec les vrais en-têtes, VLAN, cRTP et VPN.
- Per call, each direction
- 87.2 kbps
- Packets per second per call
- 50
- Voice payload
- 160 bytes
- Packet on the wire
- 218 bytes
- Total packets per second
- 3,000 Both directions
- Link needed (voice ≤ 33 %)
- 7.93 Mbps
Codecs compared with the same headers
| Codec | Packet | Per call (one way) |
|---|---|---|
| G.711 (64 kbps) | 20 ms | 87.2 kbps |
| G.722 wideband (64 kbps) | 20 ms | 87.2 kbps |
| G.729 (8 kbps) | 20 ms | 31.2 kbps |
| G.723.1 (6.3 kbps) | 30 ms | 21.9 kbps |
| iLBC (15.2 / 13.33 kbps) | 20 ms | 38.4 kbps |
| Opus (choose bitrate) | 20 ms | 47.2 kbps |
- Headers: IP 20 (IPv6 40) + UDP 8 + RTP 12 bytes per packet; cRTP shrinks them to about 2 bytes on a link-by-link basis.
- G.711 at 20 ms over Ethernet gives the classic 87.2 kbps per call per direction.
- Voice is commonly kept to about a third of a link in a priority queue, leaving room for signalling and data.
Comment utiliser cet outil: Calculateur de bande passante VoIP
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Notes techniques en anglais
Signalling (SIP), RTCP and silence suppression are not included. VPN overhead covers IPsec ESP with AES-GCM and WireGuard over IPv4. Everything is calculated in your browser; nothing is sent or probed on the network.
Payload = codec bitrate × packet interval. Each packet adds IP, UDP and RTP headers (40 bytes, or about 2 with cRTP) plus link-layer bytes; bandwidth = packet size × packets per second.
G.711 at 20 ms over Ethernet needs 87.2 kbps per call per direction; 30 calls need 2.62 Mbps each way.