# TelcoSec Calculators

> Free engineering-grade telecom calculators for SS7, Diameter, SCTP, 5G/RAN, VoIP, and signaling security — built by TelcoSec Research.

## Flagship tools

- [SIP Trunk Sizing](https://calculators.telcosec.net/calculators/sip-trunk): Calculate required SIP trunks based on traffic parameters and quality requirements.
- [Erlang B Calculator](https://calculators.telcosec.net/calculators/erlang-b): Classic tool for determining circuit requirements with zero queuing.
- [Erlang C Calculator](https://calculators.telcosec.net/calculators/erlang-c): Queue-based capacity planning for call center staffing.
- [SS7 Point Codes](https://calculators.telcosec.net/calculators/ss7-point-codes): Convert between ITU, ANSI, and other SS7 point code formats.
- [Signaling Link Throughput](https://calculators.telcosec.net/calculators/ss7-link-load): Calculate SS7 link load, utilization, and MSU capacity.
- [Diameter Bandwidth](https://calculators.telcosec.net/calculators/diameter-bandwidth): Estimate peak Diameter traffic (TPS) and bandwidth for EPC and 5G interfaces.
- [DRA Dimensioning](https://calculators.telcosec.net/calculators/dra-dimensioning): Calculate required Diameter Routing Agent (DRA) nodes based on subscriber attach rates and VoLTE usage.
- [SCTP Association](https://calculators.telcosec.net/calculators/sctp-association): Predict maximum concurrent SCTP associations based on system memory.
- [5G NR Throughput](https://calculators.telcosec.net/calculators/nr-throughput): Estimate peak 5G NR user data rates and spectral efficiency based on 3GPP TS 38.306 standards.
- [G.711/G.729 Bandwidth](https://calculators.telcosec.net/calculators/voip-bandwidth): Calculate IP bandwidth required for G.711 and G.729 VoIP codecs, including RTP/UDP/IP overhead.
- [Network Subnetting](https://calculators.telcosec.net/calculators/network-subnetting): IPv4 CIDR boundary and host range calculation tool.
- [Telecom ROI Calculator](https://calculators.telcosec.net/calculators/telecom-roi): Evaluate ROI, NPV, and payback period for telecom infrastructure and 5G upgrades.

## Topic hubs

- [Signaling Hub](https://calculators.telcosec.net/calculators/signaling): SS7, Diameter, SIGTRAN, SCTP, MAP/CAP, and SMS tools.
- [RAN Hub](https://calculators.telcosec.net/calculators/ran): 5G NR throughput, link budget, PRACH, MIMO, and spectrum tools.
- [VoIP Hub](https://calculators.telcosec.net/calculators/voip): SIP trunk sizing, Erlang B/C, codecs, jitter/MOS, and IMS dimensioning.
- [Security Hub](https://calculators.telcosec.net/calculators/security): Subnetting, encryption strength, auth vectors, IPsec overhead, GTP-U.

## Compare guides

- [Erlang B vs Erlang C](https://calculators.telcosec.net/calculators/compare/erlang-b-vs-erlang-c): When to use loss systems vs queued staffing models.
- [SIP Trunk vs PRI](https://calculators.telcosec.net/calculators/compare/sip-trunk-vs-pri): Capacity and planning differences for SIP trunks vs legacy PRI.
- [SS7 Point Codes vs MTP3 Converter](https://calculators.telcosec.net/calculators/compare/ss7-point-codes-vs-mtp3): Quick format conversion vs structural MTP3 analysis.
- [NR Throughput vs EN-DC](https://calculators.telcosec.net/calculators/compare/nr-throughput-vs-en-dc): SA NR peaks vs LTE+NR NSA aggregates.
- [Diameter Bandwidth vs DRA](https://calculators.telcosec.net/calculators/compare/diameter-bandwidth-vs-dra): Interface TPS first, then DRA node counts.
- [G.711 vs Opus Bandwidth](https://calculators.telcosec.net/calculators/compare/g711-vs-opus-bandwidth): Legacy PCM/G.729 vs Opus IP sizing.

## Optional

- [All calculators](https://calculators.telcosec.net/calculators): Full catalog of 58+ telecom engineering tools.
- [HTML sitemap](https://calculators.telcosec.net/sitemap): Human-readable site map.
- [TelcoSec Research](https://www.telcosec.net): Parent platform for telecom security intelligence.
- [TelcoSec Academy](https://learn.telcosec.net): Structured telecom security education.
- [TelcoSec Library](https://library.telcosec.net): Standards and research library.
- [API health](https://calculators-api.telcosec.net/health): Public API health endpoint.