SLIS
Satellite Link Interception System

General Features, Operations and Characteristics

• Speech data (telephone talks);

• Fax messages (analogue or digital);

• Short text messages;

• Communication sessions using public (the Internet) or private networks;

• Videoconferencing communications.

Functionally the SLIS system incorporates 7 independent subsystems used to receive and process most common systems employed in satellite communications:

a. SLIS‐RF

• System for reception, amplification and transmission of high‐frequency signals coming from satellite antenna assemblies to reception and processing systems, as described below;

b. SLIS‐E1

• Reception and processing subsystem for E1 channels

• Provides reception and processing of high‐speed communication lines, corresponding to E1/T1 standard, and their derivatives;

c. SLIS‐MX

• Subsystem for reception and processing of static and dynamic multiplexing channels

• Provides reception and processing of a wide range of communication lines (as regards speed and type of equipment);

d. SLIS‐DI

• Subsystem for reception and processing of data transmission channels

• Provides for reception and processing of communication lines used in public and private computer networks;

e. SLIS‐VS

• Subsystem for reception and processing of VSAT communication channels

• Provides for reception and processing of communication lines, only corresponding to different standards of the global VSAT system;

f. SLIS‐GA

• Subsystem for reception and processing of satellite communication channels used for transporting of information of GSM‐operators (GSM‐A, Abis)

• Provides reception and processing of communication lines transmitting information between base stations and switching centers of cellular operators;

g. SLIS‐DB

• Subsystem for accumulation and storage of received information

• Provides long‐term storage of organized information, sorting and processing of operator enquiries, generation of reports and recommendation.