Phone: (469) 634-4200

dsTest Tsp Application Nodes

dsTest supports both server emulation and client interface simulator capabilities for the 3GPP LTE Tsp Diameter interface. The Machine Type Communication Interworking Function (MTC-IWF) acts as the Diameter server, the network element handling action requests and sending notifications. The Service Capability Server (SCS) acts as the Diameter client, the network element requesting actions and handling notifications from the MTC-IWF. Use our Tsp Interface application on our SCS node simulator to test the capacity and performance of  MTC-IWF network nodes. Test the capacity and performance of your SCS with our MTC-IWF node simulator. If you are testing CIoT/NB-IoT, dsTest can surround a CIoT Serving Gateway Node (C-SGN) with all the interfaces needed to verify the functions required of the C-SGN.

The Tsp reference point is stateless, and is specified in 3GPP TS 29.368.

Read more about our CIoT test solution.


The Tsp Interface Application supports the following procedures/messages:

  • Device-Action-Request/Answer
  • Device-Notification-Request/Answer

A complete set of events that can be generated/received with the Tsp interface can be found here, and our Diameter Dictionary can be used to help design, test, validate, and interpret the results of your Diameter testing.

As with all dsTest products, the node configurations and test scenarios are easily defined and configured with XML files that are validated against a published XML Schema to avoid invalid definitions. With our dsClient GUI, you can create, run, and archive tests, capture, graph and archive operational measurements, capture real-time data flows, and manage your dsTest servers and testing scenarios with a standalone application that runs on your PC.

SCS Testing (Server Emulation)

The MTC-IWF node emulator initiates the appropriate responses when appropriate, eliminating the need to dedicate a production server to lab activities.

MTC-IWF Testing (Client Simulation)

Our Tsp Interface application on our SCS node simulates a Tsp interface to determine the processing capacity and performance of the MTC-IWF. The Tsp interface application allows users to validate SCS performance and capacity in a realistic network environment, replicating the deployment configuration. Execute timed chains of test events with a run-time command or during an automated test to trigger procedures initiated by an SCS.

Multiple SCS and MTC-IWF nodes can be instantiated on a single dsTest server or VM, each with scalable subscriber loads and transaction rates. In this mode the Tsp interfaces of up to 1000 independent  nodes may be simultaneously simulated. The nodes are fully independent and their subscriber configurations may also be independent, overlap, or be duplicated.

Advanced Testing Features

SmartEvents — Alter application behavior or coordinate multiple interface applications with SmartEvents. Our programmable, subscriber-level state machine gives you the ability to define handlers for specified application events that can then cause an event in another application to be executed. You can also configure handlers to modify subscriber information during run-time, introduce timers, or randomize subscriber behavior based on configurable probabilities to name a few of the many options in one of dsTest’s most powerful features.

SmartMessageElement — Insert, delete, or replace elements in Diameter, RADIUS, MAP, LDAP, GTP, REST, or SOAP messages with our SmartMessageElement solution. Define proprietary signaling or corrupt elements to facilitate negative testing. You can specify when your elements are used with SmartEvents.

Traffic Profile — Draw the shape of your test actions across time with Traffic Profile. You can define the rate for any action as a static rate or reference a Traffic Profile configuration, which also means that multiple Traffic Profiles can be running concurrently. Use Traffic Profile in conjunction with the randomizing features in SmartEvents to design a test that more truly simulates real-world network activity.

Diameter Dictionary — Define a set of message templates against which all messages will be validated with our Diameter Dictionary. Whether you’re load testing or testing functionality all messages are validated.

Operational Measurements

dsTest provides rich sets of measurements for the Tsp interface:

  • Transaction and transport layer attempts, successes, and failures
  • Transaction duration, transactions-per-second, and round-trip delay
  • Message and byte counters
  • Errors encountered and error indications received in messages

See our Online Help for Tsp measurements, Diameter measurements, and socket measurements.

You can read more about the reporting features offered with dsTest and dsClient here.

Supporting Standards