SIP Trunk Calculator
Determine the optimal number of SIP trunks for your business based on user count, call concurrency, voice codec, and redundancy requirements.
Calculate
How Many SIP Trunks Do You Need?
Set your user count, concurrency rate, and redundancy level to get an instant recommendation.
Users & Traffic
Typical office: 20-30%. Call center: 50-80%.
Codec & Redundancy
Why This Matters
SIP Trunk Sizing Done Right
Over-provision and you waste money. Under-provision and callers hear busy signals.
Prevent Busy Signals
Under-provisioned trunks mean callers hear busy tones. Our calculator sizes for peak traffic so every call connects.
Codec-Aware Bandwidth
G.711 delivers HD voice at 87 Kbps per call. G.729 compresses to 32 Kbps. Know your bandwidth needs before ordering circuits.
Built-In Redundancy
Choose N+1 for basic failover or 2N for full high-availability — never lose voice service due to a trunk failure.
Related Services
Need help deploying SIP trunks or migrating from legacy PRI lines? Our VoIP engineers handle provisioning, QoS tuning, and cutover.
Ready to Upgrade Your Voice Infrastructure?
Our certified VoIP engineers design and deploy SIP trunk solutions with QoS optimization, failover, and number porting — fully managed.