IMS Core Network Emulator

Emulate IMS network nodes and generate realistic traffic between network devices, including VoLTE IMS, SMS.
IMS Core Network Emulator

Emulate IMS network nodes and generate realistic traffic between network devices, including VoLTE IMS, SMS.


The Valid8 IMS Core Network Emulator provides an all-in-one, cost-effective and ultra-portable IMS network for demonstration, testing and training purposes.

What It Can Do For You

Emulates all necessary IMS core nodes including P/I/S-CSCF, AS and 4G/5G nodes including HSS/UDM and PCRF, connecting on Cx/Dx,Rx, Gx,Gm, Mw, SGi interfaces.

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


  • Realistic network emulation handline 1,000s of devices and calls (scalable)
  • Emulates some or all of core network, exposing all internal interfaces
  • Emulators available per subsystem (CSCF Emulator, PCRF Emulator, etc.)
  • True stateful simulation
  • Signaling request/response messages for call handling, authentication, etc.
  • 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
  • ‍Alerts and notifications
  • Connects to 4G or 5G network emulator

Related Video

Additional Videos


The Valid8 IMS Core Network Emulator is comprised of multiple subsystems that are available individually or in parallel, and are scalable to fit your needs. The individual emulators are controllable through their call controllers, and the traffic can be captured through use of a remote capture tool such as Wireshark.

  • Registration Attempts
  • Registration Successes
  • Registration Failures
  • Call Attempts
  • Call Successes
  • Call Failures
  • Calls per second (CPS)
  • Call setup time
  • Call tear down time
  • Media Tx Packets (audio)
  • Media Rx Packets (audio)
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. Includes Autom8 Python framework.


The application’s subsystems can be edited directly in the browser using TDL. The Message Workshop allows for the creation of test scenarios directly from the hex stream of a remote capture, while the Composer graphical editor (being deployed for all products in 2021) will allow for creating customized call scenarios by dragging and dropping the call flow to meet your test needs.
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IMS Core Network Emulator

Use Cases

SIP Client Under Test

For testing the SIP Client, the Valid8 Tester can generate SIP calls to test performance and stability.

Supported Scenarios:
  • INVITE Audio/Video calls

UE Phone Under Test

For testing phones that have cellular data capability, the 5G 4G 3G Base Station Emulators can provide OTA testing capability through its built-in base station and core network emulator. It enables end-to-end testing.

Supported Scenarios:

Supports scenarios:

  • Power on
  • Attach
  • Detach
  • TAU
  • Data Connection
  • VoLTE (with IMS Core option)
  • SMS (with IMS Core option)

Some of the key capabilities introduced with the M5/M1 Mobile UE Tester Include:

  • Lower Cost Per Test
  • Increased Test Environment Flexibility
  • Comprehensive Test Menu
  • Actionable/Collaborative Reports

  • End-to-end Over-the-Air performance test capability
  • Includes RF base station
  • Emulates all core network nodes and allows for data connection to external networks
IMS Core Network Emulator
IMS Core Network Emulator

Summary of Specifications

The Valid8 IMS Core Network Emulator is capable of simulating and testing several devices individually or in parallel and is scalable to fit your needs.


Protocol Specifications

  • IETF RFC2327
  • IETF RFC3261
  • IETF RFC3550
  • TS 23.003
  • TS 23.008
  • TS 24.167
  • TS 24.229
  • TS 29.228
  • TS 29.229
  • TS 29.328
  • TS 29.329

Product Details

  • IMS Core Network Emulator

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: IMS Core Network Emulator
  • Product Code: ims-core-network-emulator

Datasheet Page

Related Video

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SIP Loader

SIP Load Tester 

  • Product Code: sip-load-tester

Load options:
sip-load-tester-100 : 1,000 sessions, basic call
sip-load-tester-1000 : 1,000 sessions, basic call
sip-load-tester-10000 : 10,000 sessions, basic call
(others on request)

Protocol interface options:

Miscellaneous options:
Security, fuzzing, penetration test

Licensing options:
(not applicable)

Datasheet Page
M5 Mobile UE Emulator

M5 Hardware


Software Only



  • Actual throughput levels over radio may vary based on the 3rd party device manufacturer and software versions. Valid8 product specifications are subject to change at any time without notice.

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Product Name: MCPTT Load Tester 

Product Code: mcptt-load-tester

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