Skip to main content


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, interworking and security of Diameter traffic while ensuring forward and backward compatibility between 5G and 2G/3G networks.

DSC Icon

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

  • Diameter Traffic Management
    Mediation, message normalisation, load balancing and throttling optimise network management.

  • 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 an 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

DEA graphic

Diameter Edge Agent

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

DRA Graphic

Diameter Routing Agent

Diameter Routing Agent for scalable centralised routing of Diameter messages in a multi-vendor, multi-node environment within a service provider’s IMS core.

IWF Graphic

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.

Specifications icon


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

laptop icon


A comprehensive, web-based management system delivers on-board configuration, monitoring and debugging.

Video Icon

Training Videos

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.

SVI-STP Graphic

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

SVI-SBC Graphic

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

svi-smsc graphic v2

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)

DSC Redundancy Diagram 3d

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 is maintained between DSC nodes.
  • n + 1 redundancy available.
DSC Redundancy Diagram 1b

Multi-Faceted Deployment (3G)

DSC Redundancy Diagram 2b

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.

Solving The 4G LTE Roaming Puzzle graphic

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. 


Transactions per second


Transactions per year


Telecom Operators



sure logo
t mobile logo
orange logo
smile logo
digital logo
globalstar logo
simony logo
cloud 9 logo
lobar logo
transited logo
joytel logo
Cerillion logo
cubic telecom logo
Netengage logo for carousel
csg logo
gms logo
combridge logo
magna 5 logo
oxio logo
telna logo
wireless logic logo
openserve logo
cablenet logo
ringring logo
teliax logo
sify logo
bluesky logo
Missouri logo
webbing logo
idt logo
renna mobile logo
intellico logo
parateum logo
epic logo
kore logo
link mobility logo
websms logo
grapevine logo
cms networks logo
sip wise logo
cst logo

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

Further Information


Security Edge Protection Proxy

Advanced core network security with 5G Edge Protection Proxy


HTTP/2 Signalling Controller

Optimise NR and VoNR Coverage for Your Subscribers


Service Communication Proxy

The SVI-SCP provides scalable, seamless routing and comprehensive carrier-grade traffic management of 5GNR core networks