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Shoghi Communications Ltd.
 

Semi Active GSM Monitoring System

Post date:2008-05-23
Expiry date:2008-05-30   [ Expired ]

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Selling lead description:


Semi Active GSM system is a lawful interception system comprising of ADSL interception to handle up to 6 Duplex Spy Phone communications and A5/1, A5/2 and A5/0 encryption-surveillance in real time

Price information:N/A
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Member since: 2006-10-17
Country: India
 Contact details:
Tel: 91 11 23351301
Fax: 91 11 23351303
Website:
Address: 707 Ansal Bhawan, 16 Kasturba Gandhi Marg, New Delhi 110001, New Delhi, - India
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Data link encryptor family is providing full-duplex, synchronous line encryption for data rates up to 2.048 Mbps. All types of application such as classical link encryption and dial-up systems within public or private networks are supported. It works in a protocol-dependant (parts of the line protocol are not encrypted) operating mode. Feature and specifications Data throughput upto 2.048 Mbps. Works in protocol transparent or protocol-dependent operating mode. Adaptable to all common interface specifications such as ITU-T G.703 (e.g. digital hierarchy E1) or recommendations. Localize error in the local as well as in the remote encryptor or on the link. Self-synchronizing even after sync loss due to bit errors or bit slips on the respective channel. Application Leased Line / ISDN. Satellite (PAMA/DAMA). Channel Encryption. 10/30 Channel Digital Radio (Fractional E1).
Data Link Encryptor		 The Shoghi PCM/TDM Demodulator, in conjunction with any phase stable receiver, provides the capability to demodulate and monitor any standard and non-standard TDM transmissions having bit rates ranging from 50 kb/sec to 52Mb/sec for QPSK transmissions and 100 kb/sec to 26 Mb/sec for BPSK transmissions. The unit has been designed for use with transmissions that have been severely degraded from low signal levels and adjacent spurious interference carriers. Adjacent channel interference is minimized through the use of a Surface Acoustic Wave (SAW) Intermediate Frequency (IF) band pass filter, followed by a modified Costas loop QPSK/BPSK demodulator. The SAW IF filter results in excellent out-of-band rejection while maintaining flat in-band envelope delay (phase) characteristics. These can be used by the operator to monitor the critical "eye" and constellation patterns of the demodulated waveform to accommodate optimum RF receiver tuning and IF selection, and general signal analysis. Modularity has been designed into every active element of the demodulator to produce a unit that is field repairable utilizing unskilled personnel. Features and Specifications: The capability to demodulate and monitor any standard and non- standard TDM transmissions. having bit rates ranging from 50 kb/sec to 52Mb/sec for QPSK transmissions and 100 kb/sec to 26 Mb/sec for BPSK transmissions. Adjacent channel interference is minimized through the use of a Surface Acoustic Wave (SAW) Intermediate Frequency (IF) band pass filter, followed by a modified Costas loop QPSK/BPSK demodulator I and Q channel outputs from the QPSK and the single output from the BPSK demodulator are available on BNC connectors located on both the front and rear panels of the demodulator The mean-time-to repair (
PCM/TDM Demodulator		 SCL-5030 TCL is online Thuraya Intercept and Logging System. SCL-5030 TCL logs the location of MES operating within user-selected spot beams, and the telephone numbers with which they communicate (mobile originated calls). The system monitors the C-band return links from the MES, which are transmitted from the satellite as a single beam with global coverage. It also monitors the L-band control channels to identify active spot beams and L-band channels. System uses a scanning technique to identify C-band downlink frequencies for spot beams of interest. These channels can subsequently be monitored to record the position of mobiles operating within that spot beam, and capture details of the telephone numbers that the mobile contact. The scanning process is performed continuously, as the frequencies used are dynamically allocated, and change periodically. The position of the target will be known to within GPS accuracy, (typically 10-20 meters under current conditions) and it would then be possible to mount direct surveillance of the target. The system incorporates a large database containing call details and handset GPS positions captured. Telephone numbers dialed by the handsets are recorded by the system, and simple search facilities allow all calls to a particular telephone number to be displayed, along with their associated information. Wildcards may be used to extend the telephone number search to, say, a particular area or country, but the high numbers of results may present additional challenges to extracting useful information. The mapping facility allows MES locations to be shown directly, and for call details to be obtained by pointing the mouse at the relevant locations. Product Brochure Contact for this Product Features : Automatic grabbing of information from C-band. -Establishment cause -IMSI -MES Power Class -GPS position -GPS timestamp -Current position indicator -Telephone number Automatic grabbing of information from L-band. -Current satellite position -Spot beam identifier -Location of spot beam center -Location of adjacent spot beams -Adjacent spot beam frequencies -All BCCH channel frequencies in use -Access/timing information Provides Spot Beam Visibility Map. Provides Map Display with Handset Position Plots and Call Detail. Automatically plot the accumulated information on a map,providing a clear view of the spots that have been detected and their relationship to countries and towns on the ground. Plot the called areas/locations (using an area code database built into the software) and the MES position that was transmitted when the call was made, using the system mapping facilities.
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