Lawful Interception

Law Enforcement Monitoring Facility for Law Enforcement Agencies

Law Enforcement Monitoring Facility

As a legally sanctioned official access to private communications, Lawful Interception (LI) is a security process in which a service provider or network operator collects and provides Law Enforcement Agencies (LEA), regulatory or administrative agencies, and intelligence services with intercepted communications of private individuals or organizations.

STINGA CC Mediator, STINGA IRI Server and STINGA LI Analyzer are parts of a STINGA LEMF (Law Enforcement Monitoring Facility) collecting, analyzing and storing Intercept Related Information (IRI) and Contents of Communications (CC) from Public Telecom Networks (PTN), and providing decoded signaling and media information to Law Enforcement Agencies (LEA). Standardized Handover Interfaces (HI1, HI2 and HI3) as well as proprietary interfaces between PTN and the Law Enforcement Monitoring Facility are supported.

 

STINGA LEMF

STINGA CC Mediator

STINGA CC Mediator decodes HI3 records/TCP streams and LI supplementary information like LIID, CallID and time information are stored in a database.

Sound/voice (PCM/AMR/AMR-WB, mono or stereo), is extracted from SIP RTP, Broadband ADSL or ISDN PRI (TDM) and saved to WAV/AMR files. Sound/voice related to multiple calls can be streamed to RTP players for real-time listening.

For IMS/VoLTE, SIP signaling messages are typically transferred over HI3 with a CC header. STINGA CC Mediator is then used to extract relevant IRI information from the SIP signaling messages and from the CC header.

The IRI information like Called Party Number, Calling Party Number, SMS, MMS, geographical information can in this cased be saved to CSV files or to a database.

IP signaling related to the same LIID can be saved to a PCAP file. PCAP files can be analyzed further by STINGA VoIP Extractor to separate SIP/H.323 signaling messages and media. SIP/H.323 signaling messages are correlated with the corresponding media messages.

STINGA LI Analyzer can be used to decode protocol signaling messages encapsulated with the HI3 information.

STINGA IRI Server

STINGA IRI Server decodes HI1/HI2 records and store relevant information in a database. HI1/HI2 can be correlated with HI3 information. STINGA IRI Server can also decode SIP messages, extract relevant IRI information and store the information in a database.

SMS messages (7, 8 and 16 bit) are converted to readable text and stored in the database. Fragmented SMS messages are concatenated.

STINGA LI Analyzer can be used to decode protocol signaling messages encapsulated in HI2 records.

STINGA LI Analyzer

STINGA LI Analyzer is a Windows-based protocol analyzer decoding Intercept Related Information (IRI) and Content of Communications (CC) based on IRI and CC files as input.

STINGA VoIP Extractor

STINGA VoIP Extractor takes PCAP files as input and splits the signaling and user data into IRI files (SIP or H.323 signaling), WAV files (sound/voice) and RTP payload files correlated to SIP or H.323 calls. Signaling is decoded and call related information like start time, called party number, calling party number are stored in a database.

Features

  •  IRI decoding & storage
  •  CC decoding & storage
  • Signaling & media separation
  •  Real-time voice streaming
  •  IMS, VoLTE, SIP, H.323 and ISDN
  •  PCM, AMR and AMR-WB codecs
  •  Mono & stereo sound
  •  SMS decoding & storage (7, 8 and 16 bit)
  •  Fragmented SMS
  •  Voice Quality Analysis

“Our relation with Utel Systems started over a decade ago. Utel Systems has consistently delivered over and above our expectations. Their high technical competence make them a valued and trusted partner, and their customer service is unsurpassed.”

Per Lorentsen

CTO, Telenor Global Wholesale, Norway

“When we took delivery of our STINGA product, we were extremely impressed by the help and support provided by Utel Systems. They assisted us with the initial configuration and demonstrated many of its features. Utel Systems have been extremely proactive in requesting feedback on its usability. Any errors have been dealt with promptly and made available in extremely short timescales. A really useful product with a great team backing it up.”

Andy D. Fisk,

Integration Test Engineer, BT, UK

“Our relation with Utel Systems started over a decade ago. Utel Systems has consistently delivered over and above our expectations. Their high technical competence make them a valued and trusted partner, and their customer service is unsurpassed.”

Per Lorentsen

CTO, Telenor Global Wholesale, Norway

“When we took delivery of our STINGA product, we were extremely impressed by the help and support provided by Utel Systems. They assisted us with the initial configuration and demonstrated many of its features. Utel Systems have been extremely proactive in requesting feedback on its usability. Any errors have been dealt with promptly and made available in extremely short timescales. A really useful product with a great team backing it up.”

Andy D. Fisk,

Integration Test Engineer, BT, UK

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