Gx Interface

Diameter load tester Gx interface test solution
Gx Interface

Diameter load tester Gx interface test solution


Gx interface is between the PCEF and PCRF. The Gx interface test solution from Valid8 enables conformance or load testing of this interface,

What It Can Do For You

Tests the Gx interface.

Why It’s Different

  • Scalable software-based architecture can run on a range of hardware from COTS and high-end customer provided hardware to Virtual Machines and the Cloud (e.g. Amazon AWS) for maximum versatility and performance
  • Web-based UI is easy to learn
  • HTTP API enable integration with automation test systems and other equipment
  • Stateful modeling provides accurate emulation of network elements


  • Emulates some or all of core network, exposing all internal interfaces
  • Can run alongside 4G and 3G core network emulators
  • Conformance tests available for each interface
  • Emulators available per subsystem 
  • OTA connection available for UEs and IoT devices
  • True stateful simulation
  • Signaling request/response messages for call handling, mobility management, authentication, QoS
  • Report on media received, call connect time, call duration, jitter, packet loss
  • Generate valid and invalid/negative messages and call-scenarios (fully editable scenarios)
  • Supports sending invalid messages including malformed, dropped, and misordered packets
  • Check parameters in messages from SUT and flag errors
  • 3GPP-compliant interfaces


  • Base station (femto or emulated)
  • AMF
  • SMF
  • PCF
  • AUSF
  • UDM
  • UDR
  • N3IWF
  • EIR
  • MME
  • SGW
  • PGW
  • OCS
  • HSS
  • PCRF
  • ePDG
  • Credit Control Requests/Answers Initial, Update and Terminate (CCR/A-I/U/T)
  • Abort Requests/Answers (ASR/A)
  • Reauthorization Requests/Answers (RAR/A)
  • Session Termination Request/Answers (STR/A)
  • Successful and Unsuccessful answers
Configurable Parameters
  • ‍Call session length
  • Concurrent calls/endpoints

Automation API

User commands can be fully automated using REST API. This includes performing all test control functions as well as collecting results and metrics. It can be integrated into virtually any CI system via the HTTP API, including Jenkins, CircleCI, Gitlab and others.


The application’s subsystems can be edited directly in the browser using TDL or by using the graphical tools. The Message Workshop allows for creating of test scenarios directly from the hex stream of a remote capture, while the Graphical Editor (on the feature roadmap for 2019) will allow for creating customized call scenarios by dragging and dropping the call flow to meet your test needs.

This is some text inside of a div block.

Use Cases

PCRF Under Test

For testing the PCRF, the 4G Network Emulator can wrap around the PCRF with the core network and IMS.

Supported Scenarios:
Gx Interface
Gx Interface

Summary of Specifications


  • 3GPP TS 23.203, TS 29.212 (Gx)
  • IETF RFC 6733, IETF RFC 3588, IETF RFC 5516 (Diameter)
  • IETF RFC 4960 (SCTP)
  • IETF RFC 793 (TCP)

Product Details

Gx Interface

All Solutions

Valid8 exports its products strictly in accordance with all US Export Control laws and regulations which shall apply to any purchase or order. Specifications are subject to change without notice.

500 West Cummings Park, Suite 6550 Woburn, MA 01801
p: +1-855-482-5438
f: +1-781-996-3708

Ordering Information

Product Name: Diameter Load Tester 

Product Code: diameter-load-tester

Datasheet Page

Related Video

Related Solutions

4G Core And RAN Network Emulator
  • Product Name: 4G Network Emulator
  • Product Code: 4g-network-emulator
Datasheet Page

Navigate through All Solutions