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Professional modeling tool for dimensioning IP transport capacity when transitioning legacy TDM signaling linksets to modern SIGTRAN (SS7-over-SCTP/IP) adaptations.
SIGTRAN overhead calculators estimate IP bandwidth when moving SS7 from TDM (E1/T1) to M2PA/M3UA over SCTP, so migration BOMs include header cost—not just raw MSU bits.
This tool calculates the total packet size by wrapping the SS7 MSU payload into the chosen SIGTRAN adaptation layer, adding SCTP chunks, and factoring in IP/UDP or IPsec headers.
Built on 3GPP Technical Specifications, ensuring accuracy for production deployments and security audits.
Calculations specifically designed to identify protocol vulnerabilities and signaling misconfigurations.
Aligned with IETF RFC 4666 (M3UA), RFC 4166 (M2PA), and RFC 4960 (SCTP). Includes standard MTU/MSS impact analysis for signaling gateways.
Edge-V8 Isolate
Technical Audit
< 50ms (Global)
Secured by Auth0
At 500 MSU/s with 60-byte average user data, IP+SCTP headers can push offered load well above the raw 240 kb/s payload rate. Provision the IP path with headroom for retransmission and mate-path failover.
Does not model SCTP congestion control or vendor-specific bundling. Calibrate with packet captures on the target SGW/STP.
SIGTRAN (M2PA/M3UA over SCTP/IP) replaces 64 kb/s signaling timeslots with IP packets that carry MTP3 user data plus SCTP/IP headers. Overhead depends on MSU size, bundling, and whether you use M2PA or M3UA; plan IP capacity from measured MSU rates rather than assuming 1:1 with E1 signaling channels.
M2PA preserves MTP2-like link semantics between STPs/SPs. M3UA is an ASP/IPSP model that terminates MTP3 user parts at a signaling gateway. Choose based on whether peers expect linksets (M2PA) or ASP/SGP associations (M3UA).
No. You still engineer message rates and failover headroom. The capacity medium changes from TDM timeslots to IP/SCTP paths — use this overhead model with the SS7 link-load calculator.
Convert between ITU, ANSI, and other SS7 point code formats.
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Decode Advanced 5G & LTE Signaling Protocols
Bring the theory to life. Access visual call flows, 3GPP standards walkthroughs, and GTP-U tunnel optimization training designed for core network architects.
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