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CC Interface, DCCA Interface, OCS Emulation, PGW Simulation

dsTest supports both server emulation and client simulation for the Diameter Credit-Control Application (DCCA) CC Interface application.  Test PDN Gateway (PGW) Credit-Control (CC) functions with our Online Charging System (OCS) Emulator.  Use the PGW’s Policy and Charging Enforcement Function (PCEF) simulation with the CC Interface application to test the capacity and performance of an OCS.  Use the OCS Emulator and the CC Interface application in tandem to test Diameter Routing Agents (DRA), Diameter Proxies, Relay Agents, and Redirect Agents.  DCCA is specified in IETF RFC 4006.

Comprehensive sets of operational measurements for the C Interface, Diameter, and socket level are collected at configurable intervals and stored in a SQLite database on the dsTest server.  Real-time measurements may be retrieved through our dsClient CLI interface or graphed via our dsClient GUI interface.


The CC Interface application supports methods for:

  • Quota management
  • Simple Debit/Credit
  • Balance checks
  • Price inquiries
  • Refunds
  • Failure Procedures

Both session-based and event-based charging scenarios are supported.  A complete set of events that can be generated with the CC interface can be found here.  Use the Diameter Dictionary to validate your messages and CC test scenario.

PGW/PCEF Testing (Server Emulation)

The OCS Emulator executes DCCA procedures based on configurable subscriber profiles, credit pools, and tariffs, responding to charging events from PGWs and eliminating the need to dedicate a production server to lab activities.  You can reconfigure credit balances in real-time, simulating the expiration of credit and testing a PGW’s compliance with network credit policies.CC Interface, OCS Emulation, PGW Testing

The OCS Emulator provides mobile subscriber credit control services for the CC interface—all of the functionality required by a PGW plus all of the benefits of an emulator.

Configurable services, quota allocation rules, credit pools, tariffs, and subscriber profiles give you the flexibility to fully test charging strategies for new prepaid services before they are deployed in a live network.

  • Test a PCEF’s usage reporting;
  • Reconfigure credit balances with run-time commands to simulate the expiration of credit, testing a PCEF’s termination behavior;
  • Control interface to change the emulator’s behavior;
  • Reconfigure your emulator in seconds by simply loading a new configuration file;
  • Simulate a non-responsive server by pausing the emulator or simulate intermittent issues by pausing and resuming;
  • Disable individual subscribers during the test run, generating unknown subscriber errors.

One OCS Emulator can support any mixture of interfaces, up to 1000 client connections.  Multiple OCS Emulators can be instantiated on a single server.  In this mode each emulator can support multiple interfaces, up to an aggregate of 1000 client connections across all emulators.  The emulators are fully independent and their subscriber databases may also be independent, overlap, or be duplicated.

Read more about our OCS Emulator.

OCS Testing (Client Simulation)

The CC Interface application can be used to simulate a PGW’s charging functionality to determine the impact of new charging strategies or OCS features and standards before they are deployed in a network.  The CC Interface application allows users to validate OCS performance and capacity in a realistic network environment, replicating the deployment configuration.OCS Testing. PGW Simulation

Execute timed chains of test events with a run-time command or during an automated test to generate Credit Control Requests (CCRs) towards the OCS.  Verify that the OCS sends the correct answers (CCAs) to the gateway.

  • Construct session-based charging event cycles – initiate the session with reserve unit requests, generate combined debit unit and reserve unit requests to simulate ongoing resource usage, and generate final debit unit requests when the session ends or when credit expires
  • Generate debit unit requests to simulate event-based charging events

Multiple PGW/PCEF simulators can be instantiated on a single server, each with scalable subscriber loads and transaction rates.  In this mode, 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.

Read more about our Capacity and Performance.

Advanced Diameter Testing Features

Enhance your testing with Developing Solutions advanced testing features:

  • Insert, delete, or replace AVPs in your messages with our SmartAVP solution.  SmartAVP enables you to define proprietary signaling or to corrupt AVPs to facilitate negative testing.
  • Configure commands to define the series of actions and rates that each subscriber takes. Advanced profiles can be created using SmartEvents to define a mix of traffic based on probability assignments.  With SmartEvents, you can specify when your SmartAVPs are used.
  • Define a set of message templates against which all messages will be validated with our Diameter Dictionary. Every Diameter message is validated, even under load conditions.

Read more about our SmartEvents feature.
Read more about our Advanced Diameter Testing Features.

Supporting Standards