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Active GSM Interceptor

Active GSM interception system acting as virtual base‑station, supporting voice and SMS interception, message spoofing and call‑channel control for GSM‑network intelligence‑gathering missions.

Voice/SMS Interception SMS Spoofing Call Control
Active GSM Interceptor workflow diagram showing virtual BTS, man‑in‑the‑middle interception, A5 decryption unit and operating‑terminal workflow.

Highlight Features

Multi‑Mode Interception Operation Supports full‑interception, full‑release, targeted IMSI/IMEI and TMSI‑based selective interception modes.
GSM Encryption Decryption Handles A5.1 / A5.2 / A5.3 encrypted GSM traffic to decode intercepted voice and SMS content.
Voice & SMS Channel Handling Multi‑channel support for voice call interception, SMS capture, modification and spoofing with custom sender identity.
Target Signal Suppression Capability to block target‑handset communications when mission conditions require signal‑denial operations.
Subscriber Identifier Harvesting Captures IMSI, IMEI together with RSSI signal‑strength metadata, recording timestamps for forensic traceability.
Call‑Whitelist Management Restrict target phone calls, permitting only pre‑registered whitelisted call‑parties for controlled‑access scenarios.
Secret Crawl & Companion‑Number Analysis Track associated handsets, detect multi‑SIM devices and extract companion‑number relationships from field‑captured data.
Built‑In System Self‑Diagnosis Automated self‑check routines for all hardware modules before or during field deployment to ensure operational readiness.

Technology & Workflow

Virtual BTS Man‑in‑the‑Middle Interception. The system emulates a virtual GSM base‑station, inducing nearby mobile phones to attach to it. Working as a man‑in‑the‑middle node, it relays traffic between target devices and real operator BTS. Intercepted encrypted GSM traffic is sent to the dedicated decryption unit for A5‑series cipher decoding. Decoded voice‑call and SMS data is forwarded to the operating terminal for real‑time monitoring, recording and further intelligence processing. Operators may apply spoofed‑SMS, call restriction or signal‑blocking actions according to selected mission mode.

Specifications

Key Brief Parameters

  • Supported Bands: WCDMA 2100 MHz, LTE‑FDD 1.8 GHz, frequency bands customizable per‑region
  • Transmit Power: 1 W per‑channel, configurable up to 20 dBm
  • Antenna: Built‑in directional antenna; optional omnidirectional antenna
  • Operational Coverage: Typically ≥1 km, shielding‑range 300‑500 m (depends on RF environment)
  • Power Supply: AC 220 V; Typical power consumption 100 W