Shout Core
Shout Core
A complete carrier-grade voice network platform built for service providers, carriers, and network operators worldwide — with separated signalling and media planes, 20,000+ simultaneous calls, and optional STIR/SHAKEN and MAN compliance built in.
20,000+
Simultaneous calls
with Shout Core platform
Class 4/5
Hybrid soft switch
capable
MAN
French number
authentication ready
STIR/SHAKEN
Call authentication
& attestation ready
Platform Architecture
Shout Core is a complete carrier-grade voice network platform that separates signalling and media planes — allowing each layer to scale independently. A single Core Edge orchestrates a cluster of Core RTP nodes, with service intelligence and management running as discrete layers across the platform.
Signalling PlaneCore Edge | The high-capacity SIP signalling layer. Core Edge handles call setup, SIP interconnect, and session management — sitting at the network boundary and orchestrating the RTP nodes beneath it. Routing and service decisions are handled by the Core Service Engine. A single Core Edge deployment supports 20,000+ concurrent calls. 20,000+ concurrent calls SIP interconnect & peering B2BUA architecture NAT traversal STIR/SHAKEN MAN SIP trunk groups & failover |
Media PlaneCore RTP | High-density media switching nodes deployed in clusters beneath Core Edge. Each node handles up to 2,000 concurrent RTP streams — with licences pooled automatically across the estate so capacity is never siloed. Add nodes to match demand. 2000 calls per node Clustered & pooled RTP pass-through & endpoint modes SRTP supported Audio play & DTMF detection Call recording (WAV/MP3) TTS & speech recognition |
Service LayerCore Service Engine | The intelligent routing and service control layer — the platform's SCP. Runs on-switch for smaller deployments or as a dedicated centralised server controlling multiple Core Edge and RTP nodes at scale. Supports real-time database lookups, web service APIs, and fully programmable dial plans. Programmable call routing Real-time database lookups Web service API integration SIP redirection Class 4/5 hybrid logic Multi-switch control |
ManagementCore Management | Unified visibility and control across the entire Shout Core estate. Manage SIP trunks, administer the platform, and maintain oversight of the switching network from a single web-based interface. Web-based administration SIP trunk & trunk group administration Allow/block list management Call statistics & reporting |
Built To Scale
The separation of signalling and media planes is what makes Shout Core different. Scale each layer independently — add RTP nodes to match capacity without touching the signalling layer.
Most softswitch platforms tie signalling and media together. That means scaling one means scaling both — whether you need to or not. Shout Core separates them by design.
Core Edge handles all SIP signalling at high volume — 20,000+ simultaneous calls through a single Edge deployment. Beneath it, Core RTP nodes handle the media streams in clusters of 2,000+ calls per node.
Service providers and carriers can add RTP nodes as call volumes grow. Licences pool automatically across the cluster — capacity is never wasted. The result is a wholesale voice platform that scales with your business rather than against it.
Backed by Shout's 24/7 global support — provided by the same engineers who built the platform.
Core Edge
Signalling plane — single deployment
20,000+
Core RTP — per node
Media plane — clustered beneath Edge
2,000+
Licence pooling
Capacity shared across entire estate
Auto
Deployment Configurations
Shout Core can be deployed across a range of configurations — from a compact SIP softswitch installation to a fully distributed carrier-grade voice network serving service providers and operators at scale worldwide.
Core Edge + Core RTP
Class 4 Transit Switch
Point-to-point carrier trunking at scale. Approved for BT IP Exchange, Cable & Wireless, and proven across major SIP interconnects.
Core Edge + Core RTP + Core Service Engine
Class 4/5 Hybrid Switch
Full transit switching with intelligent voice and call control applications — routing, number translation, and service logic running centrally.
Core Edge
SIP Redirect Server
Signalling-only deployment behind an SBC. Adds intelligent call control and optimises network utilisation without touching the media path.
Core RTP
Voice Recording Platform
In-line (tromboned), RTP sniffer, or port-mirrored recording. Supports WAV and MP3 with SFTP or email delivery.
Core RTP
Media Server
DTMF detection, audio play and record, TTS, speech recognition, call queuing, and voice menus — with email and FTP support.
Core Edge
Registration Server
Secure direct connection to IP phones. Supports authentication, call transfers, SRTP, and TLS for enterprise and hosted voice deployments.
Core Edge overlay
STIR/SHAKEN
Deployed as a signalling overlay for call authentication and attestation as an OPS operator. No core network changes required.
Core Edge overlay
MAN
Signalling-only overlay for French MAN compliance under ARCEP regulation. Signs the SIP FROM header as an OPS with no changes to your core network.
Core Edge + Core RTP
Distributed Network
Multiple Core Edge nodes and RTP clusters across geographically distributed sites — active/standby, load-share, or N+1 redundancy configurations.
Functional Specification
Full-featured carrier-grade SIP softswitch capabilities across signalling, media, and service layers — built for service providers, carriers, and wholesale voice operators worldwide.
Platform Capabilities
- ✓ Carrier-grade, proven at scale
- ✓ B2BUA architecture with full SIP header control
- ✓ Near-end and far-end NAT traversal
- ✓ Independent inbound and outbound SIP trunks
- ✓ Failover and load balance across trunk groups
- ✓ Call count limits per SIP trunk group
- ✓ Application/service selection from trunk group
- ✓ Full API for external control and integration
- ✓ Licence pooling across entire estate
- ✓ STIR/SHAKEN & MAN ready
Media & Audio
- ✓ RTP pass-through, direct, and endpoint modes
- ✓ SRTP — secure media with optional encryption
- ✓ Stereo two-party call recording
- ✓ Audio playback on all call legs
- ✓ Network whisper to A and B parties
- ✓ SIP INFO and RFC 2833 DTMF detection
- ✓ DTMF detection during audio playback
- ✓ SFTP and email delivery of recordings
- ✓ TTS and speech recognition
- ✓ IVR / Media Server on-platform
Supported RFCs
| RFC 3261 / 2543 | SIP — Session Initiation Protocol |
| RFC 2833 | RTP Payload for DTMF Digits, Telephony Tones and Signals |
| RFC 3326 | The Reason Header Field for SIP |
| RFC 3581 | Extension to SIP for Symmetric Response Routing |
| RFC 4028 | Session Timers in the Session Initiation Protocol |
| RFC 3398 | ISUP to SIP Mapping |
| RFC 5589 | SIP Call Control — Transfer |
| RFC 2976 | The SIP INFO Method |
Resilience & High Availability
Shout Core is engineered for continuous operation — across distributed sites, under load, and through planned maintenance windows.
Multiple and distributed architecture for high call volumes and geographic resilience
Automatic failover and replication ensure platform-wide high availability
Active/Standby, load-share, and N+1 redundancy configurations
Licences pooled across the entire estate — capacity is never lost
Graceful shutdown for managed upgrades with no call disruption
Automatic application restart in the event of process failure
Full suite of application management and monitoring tools
24/7 global support — from the engineers who built the platform
Ready to deploy Shout Core?
Talk to our team about capacity requirements, deployment architecture, and integration with your existing network.