GSM INTERCEPTOR

Professional GSM Broadcasting Conversations Interceptor Equipment
New technology for new challenges REAL TIME A5.1 AND A5.2 desencryption
New receivers and higher coverage (1000 to 5000 metres)
Portable device with triple feed (220, 110, VCA and 12 VCC)
It works with all bands (850, 900, 1800 AND 1900 MHz)
8 and 12 channel versions (4 and 6 simultaneous exploration cells)
Single/Dual-Band Version (850/1900 MHz and 900/1800 MHz)
General mode (Random) and specific mode interception
BTS CellPhone position and ID cells.
Interception suitable for SMS and data (text messages, Internet and GPRS data)
Low-emission undetectable system (it does not alter GSM bands 

gsm interceptor=gsm2interceptor#gmail*com

We are specialized in the information gathering products, security devices and technical devices of all kinds and providing bespoke services in the information gathering area. Our business activity includes the production of GSM, CDMA and 3G active and passive monitoring systems, data protection, emergency and tracking equipment. Our GSM systems are dominator in the monitoring.

We provide information gathering solutions for government agencies and law enforcement groups worldwide.

The range of modifications we use includes the following: 
– communication monitoring system; 
– active monitoring system; 
– passive monitoring system; 
– semi active GSM monitoring system; 
– GSM monitoring system with a5.0/ a5.1/a5.2 online decoding; 
– off-the-air GSM monitoring system.

Depending on the client’s purposes our engineers develop various systems that provide the GSM communication to any place of the World and allow to track required information for governmental or commercial needs. Systems of GSM network monitoring, A5.1 A5.2 online decoding, semi active monitoring are widely used for victim detection and recovery during various acts of terrorism and natural disasters. Off-the-air GSM monitoring system is used for the interception and monitoring of voice and SMS traffic in a passive mode, with no interfering with the cellular network’s operation.

Each monitoring system requires deep analysis in order to find the optimal way of constructing and integrating into specific environment. NeoSoft Corporation guarantees the right choice of active, passive and semi active GSM monitoring system equipment, advanced quality that was tested and proved by successful usage in working monitoring systems all over the world.

GSM interception provides tracking of cell phone traffic in a specific local area. It is a lawful interception method for government agencies that can be used for security purposes, such as monitoring of suspected criminals’ communication and definition of their exact location. Law enforcement groups use GSM interceptor pro with GSM decoding feature that allows to break the A5 encryption algorithm in the real time mode, getting relevant communication data. Semi active GSM interceptor allows to decode both A5.1 and A5.2 algorithms.  It changes its operational mode from active into passive, depending on the need in receiving decrypting keys from the network. Thanks to NeoSoft Corporation these technologies have become available for non-governmental use, and cellular interception system found its application in various defender systems and corporative working time tracking area.

GSM defenders based on passive GSM interception system are able to define the presence of any enabled GSM based device in a specific area. It is a legal GSM surveillance aimed at private property protection.

As for the corporate communication interception and time tracking, it can be performed only after the mutual consent of each subscriber of the network.  Multi channel GSM monitoring system allows to intercept voice and SMS communication data from any GSM frequency range, as well as to gather service information from mobile operator in the real time. Thanks to GSM cellular logging feature all information is saved for the following analysis of communication history.

GSM interceptor provides random and target off-the-air interception of multiple subscribers at the same time, using active methods that are non-detectable by operators. Voice and data SMS encryption is not a problem for interceptors, as they have inbuilt decoders that provide real-time decoding of all incoming information.

gsm interceptor

GSM INTERCEPTOR

The GSM INTERCEPTOR is a monitoring system that intercepts traffic in cellular GSM networks. The Interceptor works with all varieties of GSM networks, with all frequency bands and with any type of encryption. No cooperation from the network operator is needed. The system includes both a hardware device and accompanying software. It is housed in an attache case. This system is simple to use and does not require special technical knowledge in the field of computers and cellular system.

Fig.1 Main Screen The main operation screen is divided into 4 main parts: – receivers window – tape recorder window – target list/base stations list – protocol window Fig.2 Receivers window 1.Receiver number 2.Channel/Timeslot number 3.Receiver status 4.Traffic channel 5.Signal level indicator of forward and reverse channels 6.Identity of intercepted call or name of the network    operator Fig.3 Receivers setup screen Fig.4 Target List Fig.5 Target List Edit window Fig.6 Base Stations List Fig.7 Tape Recorder Window 1. Receiver number 2. Voice Record Level Indicator 3. TMSI or IMSI number 4. Duration 5. Reset Call button 6. Pause button 7. Speaker ON/OFF button Fig.8 Protocol window Fig.9 Toolbar The system has 3 main operational modes: 1. Random mode 2. Classmark mode 3. IMSI/TMSI mode Only one of these main modes can be chosen and used at any given time. In addition the system has 4 more operational modes: 4. Distance mode 5. Phone number mode 6. Reverse channel mode 7. IMEI mode The additional operational modes are used together with main modes. The additional modes can be used together in any combination. 2.1 Main Operational modes 2.1.1. Random mode This mode is usually used to intercept all calls to or from a given area if the particular phone number is unknown. 2.1.2. Classmark mode All mobile phone are distinguished by their classmarks. The classmark is one of the characteristics of mobile phones which is never changed. As soon as some phone conversation is intercepted the classmark of the active phone is displayed in the protocol window and can be put on the target list. Subsequently this parameter can be used for monitoring calls made from or to the specific mobile phone. 2.1.3. IMSI/TMSI Mode The real mobile phone number is never transmitted over the air in GSM networks. Instead of phone numbers GSM networks use special identities (IMSI or TMSI) for mobile phone authentication. Using a special technique the system discovers the identity that corresponds to the particular phone number. These identities are stored in the target list and used for monitoring by specific phone number (see Fig.5). One of these identities (TMSI) is changed from time to time. The system automatically follows all TMSI modifications and automatically updates them in the Target List without intervention by the system operator. 2.2 Additional Operational Modes 2.2.1. Distance mode This mode allows interception of those conversations, and only those conversations, being made to or from mobile phone located at a given distance from Base Stations. The distance can be specified in the Receiver Setup Screen (see Fig.3). This mode may be used effectively when there is some “Place of Interest” and there are no particular phone numbers or other information about mobile phones for that place. 2.2.2. Reverse Mode When reverse mode is active only conversations with active reverse channel (i.e. from mobile phones located near the interceptor) will be intercepted. This mode can be very useful for the interception of calls being made to or from a specific area when the interceptor is in the area. Another very effective implementation is a combination of (main) Random Mode and (additional) Distance and Reverse Modes together with a uni-directional antenna. In this case a “Place of Interest” can be defined very closely in terms of distance from one side and by azimuth from he other side. 2.2.3. Phone Number Mode When this mode is active the only calls intercepted will be calls made from or to a phone number defined in the Target list (see Fig.5 Target List Edit window). 2.2.4. IMEI Mode Some GSM networks use IMEI identity. This parameter can be very useful as it is a characteristic of mobile phones which is never changed. In addition this identity contains the model of the mobile phone. If IMEI is used by the GSM network, Interceptor will display models of mobile phones in the Protocol Window. 3. Effective Radius The Inteceptorґs effective radius may depend on the direction of transmission. In mobile communication there are two directions: * The direction outward from a base station to a mobile phone is considerd the forward channel. Normally the system can intercept traffic in the forward channel at a distance of 3 to 10 km and even more because a signal in the forward channel is strong. * The opposite direction from a mobile phone to base staion is considered the reverse channel. Normally the system can intercept traffic in the reverse channel at a distance of only 100 to 600 meters because a signal in the reverse channel is significantly weaker. The exact effective radius for the reverse channel depends on many factors including walls and their thickness, relative positioning of the system and mobile phone, terrain and more. As long as base station transmitters and mobile phone transmitters differ in power the effective radius of the Interceptor will differ according to channel, but in order to hear both sides of the conversation, the Interceptor needs to be close enough for the weaker channel – normally 600 meters or less. However, the Interceptor can also be used as a stationary device with uni-directional antennae. In this way the effective radius for the reverse channel may be increased to as much as 1,000 meters. 4. How to choose the right configuration Although the obvious answer and often the best is “the more channels the better”, still various factors such as budget may make this guideline less useful in practice. For choosing a price/performance level there are three main performance considerations: 1. Ability not to miss calls 2. Ability not to miss a more important call than the one currently being intercepted 3. Ability to intercept simultaneously numerous calls Letґs analyze each of those. 4.1 Ability not to miss calls At the beginning of interception all existing receivers dedicated to forward channels must be tuned to the nearest-to-target-phone-base-stations. Depending on its environment a mobile phone can communicate with a GSM network via one of several preferred base stations located nearby. In Fig.1 the mobile phone may choose among 4 base stations so the interceptor needs at least 4 forward receiver channels. If an Interceptor with forward receiver channels is used in this situation the chances of missing the call will be around 50%. 4.2 Ability not to miss a more important call than the one currently intercepted This is another important feature of the Interceptor. Suppose some call is intercepted. One of the forward receiver channels is then receiving voice traffic of one of the base stations and, if there are no additional free receivers, cannot monitor other calls of the base station. Therefore one of the preferred base stations is not under surveillance. If at this stage another call occurs that is more important, it cannot be missed. For that reason it is very important to have a surplus of forward receiver channels over the number of preferred base stations. 4. Number of simultaneously intercepted calls For this model of the Interceptor the number of reverse channels is usually equal to the number of forward channels. One of our standard models has 4 forward and 4 reverse channels. In practice this means that such an Interceptor can monitor and record four conversations simultaneously (including both sides of the conversation). The Interceptors can be produced and supplied in various configurations depending on customer needs and budget. The following system configurations are standard: 2+2, 3+3, 4+….8+8. (2+2) means that the system has four receiver channels: two forward channels and the other two reverse.   System features: 1.) The system covers GSM 900 -1800/1900 Mhz bands. 2.) The system acquires the IMSI, IMEI, TMSI, Class mark, dialed and received numbers info from the GSM network 3.) The system obtains vital information pertaining to the GSM network such as encryption, frequency-hopping sequence in use 4.) The system monitors calls both in encrypted (secure) and frequency hopping modes depending on the network status. 5.) The system extracts all the necessary vital information pertaining to the target GSM network from off the air interception and configures the system so as to be able to monitor any selected subscriber from the database. 6.) The system caters for handling all variants of standard authentication, cipher key generation and encryption algorithms. 7.) The system intercepts and records SMS messages from and to the targeted mobile numbers in Microsoft Word format 10.) The system interrogates the selected subscriber from the database to ascertain/confirm a target subscriber’s identity 11.) The system is available in various configurations. It is also possible to configure the system for monitoring in duplex or simplex mode or a mix of both depending on user choice at the time of order. 12.) The system determines the outgoing number dialed by a mob subscriber. 13.) The system monitors duplex communication of mobile subscriber in both mobile originated and terminated calls. 14.) The system can also work on 12 VDC, car cigarette lighter for operational use. 15.) Auto detect, decoding and recording to the digital media (magnetic / optical) of telephone conversations in the system. 16.) Scanning of GSM network parameters in the controlled area (Service Provider ,Channel No., LAC, Cell IDs, Signal Levels). 17.) Several systems can be configured in a LAN environment to provide a near-exact physical location of the target and to form a Central Monitoring Station. 18.) Showing and recording to the magnetic media of the protocol of telephone conversations and other events in an inspected zone of a communication system with sorting by numbers and dates. Performance Features: (a) Monitoring Range: The system monitoring range is 15 Km’s or greater with the help of directional antenna. (b) Encryption : The system online decodes A3, A8 & A5, A5.1 and A5.2 algorithm variants. (c) Scanning Abilities: (I) The system is able to scan the entire cellular phone activity within its range to identify potential targets. (II) The system has the capability to listen in all the simplex/duplex channels as per configuration and records all of them simultaneously. (III) The system has the capability to monitor many base stations simultaneously. (IV) The system provides more than 100 numbers of subscribers for targeting. (V) The system provides subscribers identification based on MS, ISDN, IMSI, TMSI, IMEI & Class mark. System software features: (A) Operating System : Win9x/2000 NT 4.0 /XP (B) The system displays the following data:- (I) Calling and called numbers (II) Call originator-base station or mobile (III) Type of encryption used. (IV) TMSI, IMSI, IMEI, Class mark, distance of the target from BTS and dialed/received numbers (V) Start/End date and time of intercepts. (VI) Mobile network operating in the area with their characteristics e.g. code numbers, authentication, enciphering and freq hopping in use. (VII) Network paging and handover information’s. (C) The system provides scanning ability to identify potential targets in the area. (D) The system provides simple to use targeting system. Ability to target a mobile based on its number, ISDN/IMSI/TMSI/IMEI/class mark. System Configuration: (A) Packing is available in Single suitcase /briefcase. (B) PC: Laptop type, with CD writer, ruggedised for field usage. System Electrical Specifications (A) Acceptable Voltage : 180 to 240 V AC /12 V DC (B) Acceptable Freq. Range : 47 -53 Hz System Environmental Specifications (A) Operating Temp. : 0 to 50 deg C. (B) Storage Temp : 0 to 50 deg C. System Mechanical Specifications Shock resistance is adequate to withstand effects of repeated vehicular transportation. Reference features of each system are: (I) Possibility of round-the-clock operation in an auto mode without the operator involvement. (II) Simplicity of maintenance which does not require a deep knowledge, either in the field of computers, or in the field of cellular communication systems. (III) Provision of reliable reception of the information from channels of cellular communication systems with possibilities of noise-resistant coding. (IV) Usage in the hardware of systems of element base of the world leading manufacturers Motorola, AT&T, Bell Labs, Lucent, Maxim, Intel, Hitachi, Atmel, National Semiconductor, Texas Instruments. (V) Highest reliability of the equipment.   Monitoring radio frequency cellular channels. Encrypted cellular systems tracking with a priority unknown keys. Automatic selection of indicated cellular phones for control. Selection possibility by distance from cell to target phone. Recording and storage of all information on PC hard disk or external storage. 24 hours a day continuous work.gsm2interceptor@gmail.com