Hammond Street Developments Pty Ltd

Lawful Interception

With more than a decade of experience, HSD have accumulated the expertise to provide lawful interception solutions to internet service providers (ISPs).

What is lawful interception?

The Telecommunications Act 1997 and subsequent amendments defines ISP obligations under Australian law with respect to telecommunications interception.  In short, ISPs are obliged to maintain an interception capability and facilitate the lawful interception of subscriber content when served with a legal warrant targeting a subscriber's service(s).

A complete solution for ISPs

HSD's Lawful Interception solution combines its own product offering and professional services, including consulting and training:

  • GTIS – HSD's Generic Traffic Interception System (GTIS) product is a turnkey hardware/software solution that has been in active development for the past decade.
  • Consulting Services – HSD provides complementary consulting services to support the initial deployment and ongoing support of the system.  In this capacity, HSD leverages its extensive network engineering experience and product knowledge to integrate the system into ISPs' networks and help troubleshoot any issues.
  • Training – HSD runs regular courses at its Melbourne offices for ISP staff responsible for the administration and operation of GTIS systems.

Modular and built on proven technologies

GTIS comprises a number of modular components ranging from the network layer through to the application layer:

  • Probe – the network probe component that supports the capture of traffic at line speed using hardware-based packet capture.  Software-based capture is also supported for configurations where performance, i.e. bandwidth, requirements are less demanding.
  • Mediation – the central component of the system that co-ordinates the lawful interception of subscriber services.  Mediation incorporates an easy to use, web-based, warrant management application (WMA) that supports data entry of a warrant and related entities.  Mediation also includes modules that support the formatting, packaging and delivery of content according to the relevant Australia standards.
  • Trigger – the component of the system that supports so called "triggered" intercepts, that is, an intercept triggered on receipt of an external network event such as a subscriber logging into their service.  Trigger supports the following protocols/services:
    • L2TP – Layer 2 Tunneling Protocol
    • RADIUS – Remote Authentication Dial In User Service
    • VoIP - SIP-mediated Voice-over-IP telephony services

The main technologies used in the GTIS system, include:

  • Endace DAG (Data Acquisition and Generation) cards – enables hardware-based capture in the network probe component
  • Java/C programming language
  • JBoss (Java) Application Server
  • Hibernate ORM (Object Relational Mapping) library
  • Spring Framework (open source application framework and Inversion of Control container for the Java platform)
  • PostgreSQL RDBMS
  • Linux O/S (UNIX shell and standard utilities)
  • RHEL (Red Hat Enterprise Linux) Kickstart – enables the automated installation of a custom GTIS distribution running on RHEL (currently version 6)

Strong partnerships for success

The nature of the lawful interception industry requires that vendors of solutions form strong partnerships with key stakeholders as part of the delivery of lawful interception services.  Of particular importance is the relationship that HSD has established with regulatory authorities i.e. government agencies responsible for the oversight of lawful interception compliance.

Why you should choose HSD for Lawful Interception

HSD's accumulated experience and expertise in the local lawful interception industry is reflected in its GTIS product offering.  The GTIS product combined with HSD's complementary professional services, strong partnerships and local industry knowledge, has made HSD one of the leading vendors of lawful interception solutions in Australia.

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