Guardivia

Product family 2 of 6 · Telecom core network software suite

Guardivia Core Network Suite

A modular portfolio of subscriber-management, signaling, charging-interface, roaming and messaging-interworking products for 2G to 5G networks.

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Designed, developed and supported in house by the Guardivia QoS Engineering Team

Modular control plane

Architecture view

Inputs

2G / 3G4G / IMS5G

Guardivia processing

01Subscriber02Signaling03Roaming

Outputs

ApplicationsOSS / BSS
Modules deploy independently or together; external OCS, PCRF, RAN and full 5G Core remain outside product scope.
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Product overview

Guardivia Core Network Suite is a modular set of core-network software products covering subscriber management (HLR/HSS/UDM), SS7/SIGTRAN signaling and STP, CAMEL-based service control, USSD services, IMS-to-SMS interworking (IP-SM-GW), Diameter routing (DRA) and roaming. Modules deploy independently or together for MNOs, MVNOs, MVNEs and private LTE/5G networks. The Guardivia Operator SMSC is one integrated component of this suite, not the suite itself.

What is Guardivia Core Network Suite?

Guardivia Core Network Suite is a modular portfolio of core-network software: HLR/HSS/UDM subscriber management, SS7/SIGTRAN stack and STP, CAMEL Gateway, USSD Gateway, IP Short Message Gateway, Diameter and DRA platform and Roaming Suite. It serves MNOs, MVNOs, MVNEs and private LTE/5G networks over MAP, CAP, Diameter, SIGTRAN, SIP and HTTP/2, and is developed and supported in house by Guardivia.

Does Guardivia supply an OCS or PCRF?

No. Guardivia Core Network Suite exposes standard Diameter charging and policy interfaces (Gy, Gx, Gz, Ro, Rf, S9, Sh) and a Diameter Routing Agent so that operators connect any third-party OCS, PCRF or charging system. Guardivia provides the interfaces and routing platform, not the charging or policy decision engine, unless explicitly agreed.

Last reviewed 2026-09-12 by the Guardivia QoS Engineering Team. Product facts on this page describe current capabilities; items marked “where supported”, “optional”, “integration” or “consultancy” are confirmed per deployment.

Target customers

  • MNOs modernising legacy HLR, STP or IN platforms
  • MVNOs and MVNEs building a full or partial core independent of the host operator
  • Private LTE and private 5G operators needing HSS/UDM, SMS and signaling components
  • Telecom groups standardising signaling and roaming functions across affiliates
  • Interconnect and signaling hubs offering STP, DRA and roaming services

Problems solved

  • Multi-generation networks require separate HLR, HSS and UDM databases with inconsistent provisioning.
  • Proprietary STP and IN platforms lock operators into expensive upgrade cycles.
  • MVNOs cannot launch differentiated prepaid, USSD or roaming services without their own service-control layer.
  • IMS and VoLTE subscribers need SMS continuity toward legacy MAP and SMPP domains.
  • Roaming, charging and policy interfaces toward third-party OCS/PCRF and partner networks require specialised Diameter routing.

Business outcomes

  • One subscriber-management platform for 2G, 3G, 4G and 5G profiles.
  • Software-based signaling and STP functions on commodity hardware.
  • Prepaid, USSD and roaming services under the operator's own control.
  • Messaging continuity between IMS and legacy domains.
  • A single accountable engineering team across every module.

Key capabilities

HLR / HSS / UDM

Unified subscriber identity, authentication and profile management for 2G, 3G, 4G and 5G, with IMS, IoT and MVNE hierarchies.

SS7 / SIGTRAN and STP

Full MTP2 to MAP stack, complete SIGTRAN adaptation layers, Global Title Translation and STP relay and load-sharing.

CAMEL Gateway

Service Control Point functions for prepaid voice, SMS and data control with OCS credit reservation over Gy and Ro.

USSD Gateway

Pull and push USSD, multi-level menus, mobile money and self-care over HTTP/REST application interfaces.

IP-SM-GW

SIP MESSAGE to MAP and SMPP interworking with S-CSCF integration and Diameter Ro/Rf charging.

Diameter, DRA and Roaming

Diameter Routing Agent, 3GPP interfaces, Diameter Edge Agent, TAP3/RAP, N32/SEPP where supported and roaming analytics.

Detailed feature groups

Every supported capability is listed under its correct product. Nothing is omitted for brevity.

HLR / HSS / UDM subscriber management

  • Unified 2G, 3G, 4G and 5G subscriber management in one platform
  • IMSI and SIM-to-service binding
  • Multi-IMSI and multi-SIM support
  • MVNE and reseller subscriber hierarchies
  • IoT, NB-IoT and eMTC subscriber profiles
  • IMS, VoLTE and VoNR subscriber provisioning with Initial Filter Criteria (iFC)
  • Sh and Cx integration for IMS application servers and CSCFs
  • SIM swap, number portability and real-time profile updates
  • Roaming permissions, preferred network lists and visited-network restrictions
  • CAMEL subscription information: O-CSI, T-CSI, VT-CSI and GPRS-CSI
  • AKA authentication with Milenage and TUAK; CAVE where required
  • SS7 MAP, Diameter (S6a/S6d), REST and HTTP/2 (5G UDM) integration

SS7 / SIGTRAN and STP platform

  • MTP2, MTP3, SCCP, TCAP, MAP and ISUP
  • M3UA, M2PA, M2UA and SUA over SCTP
  • TDM and E1 integration where required
  • Global Title Translation with address and digit manipulation
  • Point-code and SSN routing; SCCP Class 0 and Class 1
  • Relay, load-sharing and STP operation between nodes
  • Web provisioning and REST APIs for routes, links and GTT rules
  • Link monitoring, congestion alarms, SNMP traps and syslog export
  • Optional integration with the Guardivia SMS Signaling Firewall for SMS-layer screening

CAMEL Gateway

  • CAMEL Phase 1, 2, 3 and 4 where supported
  • CAP and MAP integration; Service Control Point functions
  • O-CSI and T-CSI call control; VT-CSI roaming control; GPRS-CSI data control
  • SMS-CSI and MO-SMS-CSI for prepaid SMS charging
  • Prepaid voice control with mid-call supervision
  • Prepaid data-session control with quota management
  • OCS credit reservation and debit over Gy and Ro
  • Flexible Number Routing; freephone and premium-rate services
  • Configurable service logic with multiple trigger detection points
  • Welcome-SMS triggers on visited-network registration

USSD Gateway

  • Pull USSD (subscriber-initiated short codes) and Push USSD (network-initiated)
  • Multi-level menu trees
  • Mobile-money services, balance enquiry, voucher and prepaid top-up
  • Subscriber self-care, service activation and callback services
  • Government and public-information services
  • HTTP and REST application interfaces
  • Stateful session management with session-timeout controls
  • TC-BEGIN, TC-CONTINUE and TC-END handling
  • Roaming USSD via home-network application logic
  • Multi-tenancy with short-code allocation per tenant
  • Session analytics, drop-rate tracking and per-short-code reporting

IP Short Message Gateway (IP-SM-GW)

  • IMS-to-legacy SMS interworking
  • SIP MESSAGE processing from P-CSCF/S-CSCF
  • SIP-to-MAP and SIP-to-SMPP conversion; MAP or SMPP-to-IMS delivery
  • S-CSCF integration and third-party registration handling
  • Bidirectional IMS and SMSC routing
  • SMS-over-IMS and VoLTE messaging continuity
  • Number-portability-aware routing on both legs
  • Diameter Ro online charging and Rf offline records per message
  • RCS-transition readiness where technically appropriate

Diameter and DRA platform

  • Diameter Base Protocol; DRA routing, load balancing and peer failover
  • S6a and S6d; Cx and Dx; Sh; Rx; Gy; Gx; Gz; Ro; Rf; S9
  • SCTP and TCP transport where supported; TLS or DTLS
  • Certificate-based peer authentication
  • AVP inspection and manipulation for policy enforcement
  • Peer-health and response-time monitoring, per-interface counters, alarm thresholds
  • Integration with third-party HSS, OCS, PCRF and IMS systems

Roaming Suite

  • Inbound and outbound roaming over SS7 and Diameter
  • CAMEL-based prepaid roaming
  • GRX and IPX integration
  • Welcome SMS on network attach
  • TAP3 record generation and RAP handling
  • Diameter Edge Agent; S6a and S9 roaming proxy
  • 5G N32 and SEPP where supported; NRF-based discovery
  • Home Routed and Local Breakout models
  • Slice-aware roaming where supported
  • Roaming analytics, reconciliation and settlement support

Private LTE and private 5G services (consultancy and integration)

Consultancy service

Guardivia provides expertise and integration services across the private-network signaling stack. Network functions not listed as Guardivia products (RAN, MME/SGW/PGW, AMF/SMF/UPF) are integrated, not supplied.

  • S1AP, LTE NAS, Diameter, GTP-C and GTP-U
  • MME, SGW and PGW integration
  • NGAP, 5G NAS, HTTP/2 Service-Based Architecture and PFCP
  • AMF, SMF and UPF integration
  • HSS/UDM and SMSC supplied from the Guardivia portfolio
  • Network slicing design
  • Signaling tracing, protocol troubleshooting and end-to-end integration

Supported protocols and interfaces

Supported protocols and interfaces for Guardivia Core Network Suite
Protocol / interfaceRoleStatus
SS7 MAP / CAP / TCAP / SCCP / MTPHLR, STP, CAMEL, USSD and SMS signalingVerified capability
SIGTRAN (M3UA, M2PA, M2UA, SUA over SCTP)IP transport for SS7Verified capability
ISUPVoice call signaling through the STPVerified capability
TDM / E1Legacy SS7 linksWhere supported
Diameter (S6a, S6d, Cx, Dx, Sh, Rx, Gy, Gx, Gz, Ro, Rf, S9)HSS, IMS, charging and policy interfaces; DRA routingVerified capability
SIP / IMSIP-SM-GW interworking, third-party registrationVerified capability
SMPPIP-SM-GW to SMSC interworkingVerified capability
N32 / SEPP, NRF5G roamingWhere supported
REST / HTTPProvisioning and OSS/BSS integrationVerified capability
S1AP, NAS, GTP, NGAP, PFCPPrivate LTE / 5G integrationConsultancy service

Swipe horizontally to view all columns.

Architecture

The suite is organised in functional layers. Subscriber management (HLR/HSS/UDM) is the identity and profile source for every generation. The signaling layer (SS7/SIGTRAN stack and STP) transports MAP, CAP and ISUP toward host and partner networks. Service control (CAMEL Gateway and USSD Gateway) implements prepaid and interactive services. The messaging layer (Operator SMSC and IP-SM-GW) delivers SMS across MAP, SMPP and IMS. The Diameter/DRA platform and Roaming Suite handle 4G/5G signaling, charging and policy interfaces and inter-operator roaming.

Each module can be deployed alone or co-located with others on the same servers. Charging and policy decisions stay with the operator's OCS and PCRF; Guardivia supplies the interfaces and routing.

Guardivia Core Network Suite modules and external interfacesA labelled architecture diagram showing systems, product boundaries and directional data flows. A detailed text description follows the figure.HOST / PARTNER NETWORKS (EXTERNAL)MSC / SGSN / MMEMAP · S6a/S6dIMS core (CSCF, AS)Cx · Sh · SIPThird-party OCS / PCRFGy · Gx · Gz · Ro · RfGRX / IPX · partnersSS7 · Diameter · N32*Private LTE / 5G coreMME/SGW/PGWAMF/SMF/UPFPrivate-network functions are integration and consultancy scopeGUARDIVIA CORE NETWORK SUITEHLR / HSS / UDM2G–5G subscribers · AKAMAP · Diameter · HTTP/2SS7 / SIGTRAN stack & STPMTP–MAP · M3UA/M2PA/SUAGTT · relay · load-shareDiameter & DRAS6a Cx Sh Rx Gy Gx Gz Ro Rf S9failover · AVP rulesCAMEL Gateway (SCP)CAP ph.1–4* · CSI triggersOCS via Gy / RoUSSD Gatewaypull / push · menus · MoMoHTTP/REST apps · multi-tenantRoaming Suitein/out roaming · DEA · TAP3/RAPwelcome SMS · N32/SEPP*Operator SMSCseparate product, integratedMAP · SMPP · SIPIP-SM-GWSIP MESSAGE ↔ MAP/SMPPS-CSCF reg. · Ro/RfPrivate LTE / 5G servicesconsultancy & integrationS1AP NAS GTP NGAP PFCPProvisioning GUI · REST APIs · SNMP / syslog · link, peer and session monitoring · HA pairs→ HLR/HSS · STP→ IP-SM-GW · DRA→ DRA · CAMEL→ Roaming · STP→ integration* where supported — confirmed per deployment. Guardivia does not supply OCS, PCRF, RAN, EPC or complete 5G Core unless explicitly agreed.Guardivia productGuardivia engine / moduleExternal systemConsultancy / integration
Guardivia modules in colour; operator, partner and third-party elements in grey. Private LTE/5G functions are integration and consultancy scope.
Text description of this diagram

Core Network Suite layers: HLR/HSS/UDM; SS7/SIGTRAN stack and STP; CAMEL Gateway and USSD Gateway; Operator SMSC and IP-SM-GW; Diameter/DRA and Roaming Suite. External elements shown in grey: host MNO MSC/SGSN/MME, IMS core, third-party OCS/PCRF, GRX/IPX and partner networks. Private LTE/5G core functions are marked as integration scope.

Prepaid roaming call flow (illustrative)

An example showing how modules cooperate for a prepaid subscriber roaming abroad:

  1. 01

    The visited MSC sends MAP Update Location; the STP routes it to the Guardivia HLR, which validates roaming permissions and returns the subscriber profile including O-CSI/VT-CSI.

  2. 02

    The Roaming Suite triggers a welcome SMS through the Operator SMSC.

  3. 03

    When the subscriber makes a call, the visited MSC sends CAP InitialDP to the CAMEL Gateway acting as SCP.

  4. 04

    The CAMEL Gateway reserves credit from the operator's OCS over Gy or Ro and applies call control with mid-call supervision.

  5. 05

    Roaming usage is recorded and reconciled through TAP3 and RAP processing.

  6. 06

    All signaling is monitored by the STP and DRA with alarms exported to the NOC.

Integrations

Integration types are stated explicitly. Custom integrations are delivered by Guardivia’s in-house QoS Engineering Team, not by an external vendor. See the full integration catalogue.

Integration categories and implementation types for Guardivia Core Network Suite
SystemDetailType
Host MNO core (MSC, VLR, SGSN, MME)MAP over SIGTRAN, Diameter S6a/S6dNative integration
IMS core (P/I/S-CSCF, application servers)Cx, Dx, Sh, Rx, SIP MESSAGENative integration
Third-party OCS / PCRFGy, Gx, Gz, Ro, Rf, S9 through the DRAStandards-based
GRX / IPX and partner networksDiameter Edge Agent, SS7 roaming, N32/SEPP where supportedStandards-based
OSS / BSS and provisioningREST APIs, bulk import, SNMP, syslogStandards-based
Guardivia Operator SMSC and SMS FirewallCo-deployed on shared infrastructureNative integration
Private LTE / 5G core functionsIntegration engineering by the QoS Engineering TeamCustom (in-house engineering)

Swipe horizontally to view all columns.

Security controls

  • TLS or DTLS on Diameter peers with certificate-based authentication
  • SCCP and GTT screening at the STP
  • Role-based administration with audit logs across all modules
  • AKA-based subscriber authentication with Milenage and TUAK
  • Optional SMS-layer screening through the Guardivia SMS Signaling Firewall

Management functions

  • Web provisioning for subscribers, routes, links, GTT rules and services
  • REST APIs for CRUD, SIM swap, bulk import and real-time queries
  • Multi-tenant administration for MVNE and reseller hierarchies
  • Configuration-change logging

Monitoring and reporting

  • Link, association and peer health with congestion alarms
  • Per-interface Diameter counters and response-time tracking
  • USSD session analytics and CAMEL trigger statistics
  • SNMP traps, syslog export and NOC dashboard integration

High availability

  • Active-active or active-standby node pairs per module
  • Session-state replication for CAMEL and USSD where supported
  • Redundant SIGTRAN associations and Diameter peers
  • Geo-redundant clustering where supported

Scalability

  • Horizontal scaling of each module independently
  • Co-location of modules on shared servers for smaller deployments
  • Separation into dedicated nodes for larger networks

Deployment options

  • Bare-metal x86, virtual machines or validated cloud environments
  • On-premise, hybrid or fully managed by Guardivia
  • Standalone module or integrated suite

Use cases

Full MVNO core

HLR/HSS, STP, CAMEL, USSD, SMSC, IP-SM-GW, DRA and roaming deployed together so the MVNO controls identity, services and signaling.

HLR/HSS consolidation

An operator replaces separate 2G/3G HLR and LTE HSS with one subscriber platform exposing MAP, Diameter and HTTP/2.

USSD mobile money

A regulator-licensed mobile-money service is delivered via the USSD Gateway with REST integration to the wallet platform.

Private 5G campus

Guardivia supplies HSS/UDM and SMSC and integrates them with the campus AMF, SMF and UPF.

In-House Engineering Advantage

Owned end to end by the Guardivia QoS Engineering Team

Every module of the Core Network Suite is built by Guardivia's QoS Engineering Team, with internal expertise across HLR/HSS/UDM, SS7/SIGTRAN, CAMEL, USSD, Diameter, roaming and interworking.

  • Cross-module changes (for example, a new CAMEL trigger that needs an HLR profile field) are made by one team on one roadmap.
  • Interoperability with a specific MSC, OCS or IMS vendor is handled in Guardivia's laboratory before staging.
  • Interfaces required by a particular operator or regulator are developed internally.
  • One support contract, one escalation path, one release cadence across the suite.
How the in-house model works →

Scope and limitations

Stated plainly so that buyers, engineers and AI assistants describe this product accurately.

  • Guardivia does not supply OCS, PCRF, radio access, EPC data-plane elements or complete 5G Core network functions unless explicitly agreed; it provides the applicable interfaces, routing and integration.
  • Private LTE and private 5G capabilities are consultancy and integration services around Guardivia's HSS/UDM and SMSC products.
  • WhatsApp, Telegram and other OTT messages are not delivered as operator SMS; the IP-SM-GW interworks IMS SIP MESSAGE traffic with MAP/SMPP domains.
  • N32/SEPP, slice-aware roaming, TDM/E1 and CAMEL phase coverage are confirmed per deployment.

Frequently asked questions

Is the Core Network Suite an SMSC?

No. The suite is a portfolio of signaling, subscriber-management, service-control, interworking, Diameter and roaming modules. The Guardivia Operator SMSC is one component that integrates with it.

Can I deploy only the HLR/HSS?

Yes. Every module is deployable independently and exposes standard interfaces, so an HLR/HSS/UDM can serve a third-party MSC, MME or IMS core.

Does the IP-SM-GW deliver WhatsApp or Telegram messages as SMS?

No. The IP-SM-GW interworks IMS SIP MESSAGE traffic (VoLTE/VoNR SMS) with MAP and SMPP domains. OTT application messages are outside its scope.

Which charging systems can connect?

Any OCS, PCRF or charging system that implements the standard 3GPP Diameter interfaces (Gy, Gx, Gz, Ro, Rf, S9). Interoperability is validated per vendor during laboratory testing.

Can Guardivia build a custom operator integration?

Yes. Because the suite is developed in house, the QoS Engineering Team creates and maintains custom integrations for documented legacy or proprietary interfaces without external vendor dependency.

What about private LTE and private 5G?

Guardivia supplies HSS/UDM and SMSC components and provides consultancy and integration across S1AP, NAS, GTP, NGAP, PFCP and the HTTP/2 service-based architecture. RAN and packet-core functions are integrated, not supplied.

Request a demo of Guardivia Core Network Suite

Demos are run by the engineers who develop the product, using your protocols and integration points.

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