Network Voice Platforms
SIP-Switch
STIR/SHAKEN
Advanced SIP Signalling Platform with integrated STIR/SHAKEN call authentication. Carrier-grade routing, attestation, and identity signing — without touching your media plane.
STIR/SHAKEN
Call Authentication
RFC 8224 Identity Header
RFC 8226 PASSporT
Attestation A / B / C
Overview
Call Flow Architecture
Shout SIP-Switch is a carrier-grade SIP signalling platform engineered for operators, MVNOs, and service providers that demand robust call routing alongside full STIR/SHAKEN attestation. Deploy as a standalone signalling overlay or integrate alongside your existing infrastructure — with minimal network disruption and zero media handling.
Originating
Carrier / SIP
SIP INVITE
SIP-Switch
STIR/SHAKEN Signing
PASSporT · Attestation A/B/C
Identity Header Insertion
Certificate Authority
SHAKEN PKI / STI-CA
Terminating
Carrier / SP
Verified Identity
Signalling Only
No media touch
Minimal impact
Features
Key Capabilities
🛡️ STIR/SHAKEN Attestation
- • Full A, B and C attestation support
- • RFC 8224 Identity header signing
- • RFC 8226 PASSporT token support
- • STI-CA certificate management
- • SHAKEN PKI integration
- • Verification on ingress calls
⇄ SIP Signalling & Routing
- • Carrier-grade SIP proxy engine
- • CLI/ANI manipulation & normalisation
- • Header enrichment & translation
- • Failover & load balancing
- • SIP OPTIONS heartbeat monitoring
🔌 Deployment & Integration
- • Signalling-only overlay deployment
- • No changes to media plane
- • Cloud, on-premise or hybrid
- • REST API management interface
- • Multi-tenant architecture
- • Existing stack compatible
Process
How STIR/SHAKEN Works with SIP-Switch
Receive
Inbound SIP INVITE arrives at the SIP-Switch signalling layer
Validate
Number ownership and attestation level verified against the STI-CA
Sign
PASSporT token created and Identity header appended to the INVITE
Forward
Signed INVITE routed to the terminating carrier with verified identity
Fully compliant with ATIS-1000074 · RFC 8224 · RFC 8226 · SHAKEN Framework Specification
Use Cases
Ideal For
Telecom Carriers
Tier 1-3 operators needing STIR/SHAKEN compliance without a full platform overhaul
MVNOs & Resellers
White-label signalling with built-in call authentication for your own customer base
Interconnect Hubs
Central signing point across multiple carrier interconnects and peering agreements
ITSP / Service Providers
Deploy over existing voice platforms with no changes to your media architecture
Technical
Technical Overview
Protocols
SIP / SIP-TLS / SRTP
TLS 1.2 / 1.3 transport
IPv4 & IPv6 dual-stack
Authentication
STIR/SHAKEN signing & verification
PASSporT / ES256 JWT tokens
STI-CA / SHAKEN PKI support
Management
REST API & web dashboard
Real-time CDR & call analytics
SNMP / Syslog alerting
Deployment
Linux VM / Container / bare metal
HA active/active or active/standby
Hosted or customer-premises
Ready to deploy?
Speak to our team about SIP-Switch and STIR/SHAKEN integration for your network.