SBC Sizing

// One or more scenarios per project — recommends platform & unit count

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Run settings

Project + safety margin

Project

Run name

Max load %

Platforms to consider

All vendors, all releases (loading…)

Vendors

Platforms

Releases

              ● public  
              ● anonymised  
              ● user-supplied
            

Scenarios

1 scenario

📥 Bulk import (CSV templates)

Download the template, fill it in offline, then upload to populate the scenarios.

📋 Scenario template ⚙ Platform catalogue

Recommendation

Platforms ranked by unit count needed (fewer is better)

Add scenarios on the left and click Calculate.

About this calculator

First-pass scoping — read this once

Web-based SBC sizing tool — multi-scenario, max-load aware, units-needed output.

Modelled: per-scenario subscribers / BHCA / ACHT / codec / registration mix; aggregated demand across all scenarios; per-resource utilisation against MPS, concurrent sessions, CPS, registration cache, IPsec endpoints; transcoding overhead; max-load safety derate. "MPS" = signaling messages per second (CPS × 10 SIP messages per call).

Data sources: mix of public vendor specs (open-source projects, datasheets where vendors publish numbers) and anonymised tier data ported from common appliance ranges. Each platform row is labelled with its source — public, anonymised, or user-supplied. Add your own platforms via "+ Add platform" or upload a CSV catalogue.

Not modelled: RCS feature transactions, multi-NIU media bandwidth checks, IPsec sub-tunnel scaling, per-feature SIP message multipliers. Use for first-pass scoping.