Maximise LTE and VoLTE Coverage to Your Subscribers

The Diameter Signalling Controller provides a comprehensive solution to manage and secure Long-Term Evolution (LTE) and IP Multimedia Systems (IMS) networks, while ensuring forward and backward compatibility with 5G and 3G/2G network technology

Diameter Signalling Controller DSC

The Diameter Signalling Controller ensures that operators can maximise LTE and VoLTE coverage for their subscribers.

Our comprehensive Diameter solution manages the routing, interwoking and security of Diamater traffic, while ensuring forward and backward compatability between 5G and 2G/3G networks.

The Diameter Signalling Controller Provides any Combination of Routing (DRA), Interworking (IWF) and Network Edge (DEA) Functionality

  • Diameter Traffic Management
    Enables robust network edge security with full Diameter Edge Agent (DEA) support.

  • Network Edge Security
    Enables robust network edge security with full Diameter Edge Agent (DEA) support.

  • Backward Compatibility
    Guarantees full backward compatibility to legacy networks with interworking.

  • Fraud & Security
    Combat fraud with integrated Fraud Prevention Gateway.

  • Roaming
    Enables seamless mobile roaming between 5G, 4G and 3G networks.

  • WiFi Offload
    Provides WiFi offload for mobile subscribers.

Diameter Signalling Controller Components

Diameter Edge Agent

Diameter Edge Agent for
secure exchange of authentication, authorisation and subscriber policy across LTE networks. 

Diameter Routing Agent

Diameter Routing Agent for scalable centralised routing of Diameter messages in a multivendor, multi node environment within a service providers IMS core.

Interworking Function

Interworking Function provides Diameter to SS7 CAMEL, MAP, RADIUS, HTTP/2 and 5G Nchf interop, insuring seamless interworking between legacy and NGN networks.

Commercial Off The Shelf

Supplied on standard Dell servers optionally with dedicated E1/T1/STM-1 support.

Virtual Deployment

Virtual Machine deployed on industry standard servers in a data centre environment using a hypervisor, i.e. VMware.

Cloud Deployment

Delivered as a Virtual Network Function (VNF) in AWS, OpenStack, Nokia and Google cloud infrastructure.


Supporting multiple interface types and legacy SS7 TDM, NGN IP SIGTRAN and IMS / LTE / 4G support.


Comprehensive web based Management System delivers on-board configuration, monitoring and debugging.

Training Video's

Watch our series of Diameter Signalling training videos and find out more about our Diameter products. 

Application Development

Extended application development on top of Diameter Signalling Controller is done via the Python based Telephony Application Server (SVI-TAS).

Enables operators to interface to USSD, RADIUS, JSON, SQL, XML, SOAP, proprietary API’s etc.

The Telephony Application Server operates over clearly defined API's that present an abstracted version of the underlying Diameter, SIP, CAMEL, MAP etc signalling. It can be driven by either our python based client (SVI-TAC), or by operators 3rd party applications.

The SVI-TAS provides an extremely flexible platform on which operators can define, configure and launch new services.

Diameter Signalling Controller’s Modular Design

The Diameter Signalling Controller’s modular design enables it to be deployed as an integrated product with Squire Technologies Signal Transfer Point, Session Border Controller and SMSC Messaging Solution.

Our flagship SS7 SVI-STP Signalling Transfer Point provides seamless Diameter to SS7 integration.

Integration with our SVI-SBC Session Border Controller provides Diameter, SIP and VoLTE support.

Integration with our SVI-SMSC Short Message Service Centre product providing Diameter billing support.

SVI-DSC | Redundant Architecture

The SVI-DSC Diameter Signalling Controller supports full carrier grade redundancy providing replicated hardware and/or software eliminating single points of failure.

Multi-Faceted Deployment (5G NSA)

In a multi-faceted deployment with integrated IWF supporting DIAMETER < > LEGACY inter-op, all components are delivered with full redundancy support.

Single Interface

  • SVI-DSC pair configured through a single interface.
  • Worker / Worker configuration.
  • Offers alternate routing between SVI-DSC nodes.
  • Session check-pointing maintained between DSC nodes.
  • n + 1 redundancy available.

Multi-Faceted Deployment (3G)

Solving the 4G LTE Mobile Roaming Puzzle Whitepaper

Squires Technologies looks at the challenges faced by operators providing roaming services to their subscribers, as the number of 4G LTE networks increases.

Trusted by Customers Worldwide

Squire Technologies solutions enable over 30 billion transactions per second and 11 trillion transactions per year. We have deployments in over 6 continents, in 150+ countries and with 400+ customers. 


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Check out what our customers are saying about us here at Squire Technologies.

Further Information

Solving the 4G LTE Mobile Roaming Puzzle

Read our whitepaper on solving 4G LTE mobile roaming

Diameter Signalling Controller Presentation

Download our SVI-DSC Diameter Signalling Controller Presentation

How Does a Diameter Signalling Controller Work

Watch our Signalling Controller Video and find out more

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