FLASH SALE Get 20% OFF everything using the coupon code: FLASH20 View Pricing Plans →
While Cisco previously offered a standalone online calculator, the functionality has largely been integrated into their broader design tools or replaced by community standards.
: Users select the voice codec (e.g., G.711 or G.729), the protocol used (IP/UDP/RTP), and the specific Layer 2 overhead (Ethernet, Frame Relay, or PPP). Core Calculation Formulas
$$ \textTotal Bandwidth = (\textPayload + \textIP/UDP/RTP Headers + \textLayer 2 Header) \times \textPackets per second $$
Cisco’s official design guides (e.g., SRND for Collaboration) provide Excel-based calculators. Example structure:
