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dsTest, Developing Solutions, J Interface, MAP Interfaces, HLR Testing, gsmSCF testing

dsTest supports server emulation and client simulation capabilities for the 3GPP LTE Mobile Application Part (MAP) J interface in UMTS networks. Use our Home Location Register (HLR) Emulator to test the J interfaces of  GSM Service Control Functions (gsmSCFs). Test the capacity and performance of an HLR with our MAP J Interface application client simulation. For more information regarding how to use dsTest for MAP functional and compliance testing, see our page on Conformance Testing. Customize your MAP/TCAP messages  and message flows using our SmartEvents and SmartTCAP features.


The 3GPP MAP J interface application implements the following services from the HLR to the gsmSCF:


The 3GPP MAP J interface application implements the following services from the gsmSCR to the HLR:


A complete set of events that can be generated with the J interface can be found here. Use our MAP Dictionary to assist in setting up and interpreting MAP test scenarios.

gsmSCF Testing (Server Emulation)

The HLR emulator initiates the appropriate service when indicated, eliminating the needdsTest, Developing Solutions, J Interface Testing, HLR Testing, gsmSCF Testing to dedicate a production server to lab activities. It provides Mobile Subscriber data repository, authentication information, and routing information services for the J interface—all of the functionality required by a HLR plus all of the benefits of an emulator.

You can manually trigger server-initiated procedures by executing a test event chain with a run-time command or during an automated test using our SmartEvents feature. You can also use the control interface to change an emulator’s behavior. 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 HLR emulator can support any mixture of interfaces, up to 1000 connections. Using concurrent interfaces also enables interaction between the interfaces. Multiple J interfaces enable support for mobility, for example. Extend the 3G functionality of your HLR Emulator with additional interfaces:

  • C – SMS, Service Center messages between MSC to HLR;
  • D/D’ – Subscriber info authentication, update, purge and insert
  • Gr – Subscriber authentication, profile, and location services for SGSNs;
  • Gf – EIR Simulation;
  • Gc – GPRS services for GGSNs.

Multiple gsmSCF simulators can be instantiated on a single server. In this mode each server can support multiple interfaces, up to an aggregate of 1000 connections. The simulators are fully independent and their subscriber databases may be independent, overlap, or be duplicated.

Read more about our HLR Emulator.

dsTest, Developing Solutions, J Interface, gsmSCF Testing, HLR TestingHLR Testing (Client Simulation)

The J Interface application simulates a gsmSCF’s J interface interface to determine the impact of new HLR features and standards before they are deployed in a network. The J Interface application also allows you to validate HLR 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 gsmSCF-initiated procedures.

Multiple gsmSCF nodes can be instantiated on a single server, each with scalable subscriber loads and transaction rates. In this mode the J interfaces of up to 1000 independent gsmSCF nodes may be simultaneously running. The nodes are fully independent and their subscriber configurations may also be independent, overlap, or be duplicated.

Operational Measurements

dsTest provides rich sets of measurements that include but are not limited to:

  • 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 MAP measurements, TCAP measurements, SCCP measurements, M3UA measurements, and SCTP measurements.

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

dsTest, Developing Solutions, J Interface Application

Supporting Standards