Scalable Voice
A cloud-native 3GPP IMS core with Release 18 features — from private networks to large operators, and to IMS-as-a-Service.
Embedded Files
Scalable IMS Core
The complete 3GPP IMS implementation.
Complete 3GPP IMS implementation with P-CSCF, S-CSCF, I-CSCF, and optionally E-CSCF and IP-SM-GW for full VoLTE/VoNR deployments
Fully developed in Golang with cloud principles and features
Supports 3GPP Release 18 and GSMA IMS, SMS, roaming and security recommendations
S-CSCF and I-CSCF integrate with HSS over Diameter Cx; IP-SM-GW integrates with HSS over Sh and delivers to SMSC over SGd
Auto-chaining in S-CSCF and IP-SM-GW for local delivery, reducing signaling — convenient for isolated private networks
Flexible breakout options to other networks
Deployable in public or private cloud, or in constrained-resource setups — from private networks to large operators, as well as IMSaaS
Scalable P-CSCF
Key differentiation:
Day-one engineering for scale and stability in production environments
Layer 3-to-7 integrated firewalling — integrated SIP control with a user-space IPsec implementation, overcoming the limits of kernel-outsourced IPsec
Cloud-inherent architecture with split state, built on modern 2024-era technologies and fast development in Golang
Licensable for small deployments and large ones alike
Flexible message manipulation and routing — deployable bundled with a Kamailio SIP proxy for fast custom logic in customer integrations
Main Features:
Release 18 compliance
Latest security algorithms (aes-gmac, aes-gcm) plus all legacy ones
User-space IPsec implementation with full control over tunnel handling and security
Diameter Rx / HTTP2 N5 integration with all features (e.g. location verification)
Media anchoring and transcoding
Flexible SIP routing and options
Emergency calling support (ng112, eCalls, RTT)
Lawful Interception interfaces
Stateless — external repository for tunnels, registrations, dialogs
Security by design
Scales from small private networks to large operators
Complementary Functions
IMS-to-5G SBI Adaptor. Connects a working 4G IMS — without modifications or updates — to the PCF, CHF and 5G UDM over Release 18 (and backwards-compatible) 3GPP interfaces. Converts IMS Diameter messages into 5G SBI HTTP2 operations, performing all necessary adaptations between the 5G and 4G attributes, events and concepts.
IPsecProxy. Lets IMS clients that cannot perform IMS AKA authentication or IPsec security associations connect to a standards-compliant IMS network, using the IPsecProxy as their SIP outbound proxy.
Client authentication via Digest MD5 or fixed/pre-configured IP address — the proxy performs AKA and IPsec towards the network
Clients with AKA but no IPsec: the proxy performs just the security association part of registration
Runs on a shared server or co-located with each client
Supplementary Services Application Server. 3GPP defines plenty of supplementary services; most MNOs and MVNOs need only some of them. Ours covers the ones operators actually use:
Barrings — for calls and SMS, separately configurable: all services, incoming/outgoing only, international, and roaming
Call forwarding — CFU, CFB, CFNL, CFNR, CFNRc and Call Deflection (CD)
Announcements — early-media announcements (no call establishment needed) and final announcements, useful with barrings and charging
Prove it on your own network
Prove it on your own network
You commit when it works, not when you sign. Contact us to talk about a proof of concept — from large MNOs to private networks, we fit deployments of every size.
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