Telephone Surveillance · VoIP Monitoring
VoIP Surveillance Detection
Detection of unauthorized monitoring, recording, and interception on VoIP and internet-based telephone systems.
Communications surveillance extends well beyond a bug in a room. Your phone lines — analog, digital, VoIP, and conference call systems — can be tapped, bridged, or intercepted at multiple points along their path. A tap placed at a terminal block in your building's basement, an unauthorized bridge on your PBX, or a conference call that has been joined by an uninvited party are all documented threats that Empire Investigation's telephone surveillance team detects and documents.
Landline tap detection involves impedance testing, loop current analysis, RF detection for active transmitting taps, and physical inspection of terminal blocks, junction boxes, and wiring runs. VoIP and conference line analysis involves network traffic inspection, system log review, and testing for unauthorized concurrent sessions or bridges. Our investigators have the technical and legal knowledge to preserve findings for criminal prosecution or civil litigation.
VoIP-Specific Surveillance Vulnerabilities
VoIP calls travel as digital data packets over IP networks, which creates surveillance opportunities that differ fundamentally from traditional telephone tapping. Unauthorized monitoring can be achieved through network-level packet capture, software installed on a VoIP handset or server, misconfigured call recording features, or unauthorized SIP trunk access. Physical tap devices are only one component of the VoIP threat landscape.
Software vs. Hardware Monitoring
Unlike traditional telephone taps, VoIP surveillance frequently involves software-based monitoring rather than physical devices. Unauthorized call recording software, compromised SIP credentials, and misconfigured PBX systems can enable continuous monitoring without any physical device present. Our VoIP security audit addresses both hardware and software-based monitoring threats.
What We Look For
- Hardware tap devices on VoIP handsets or network equipment
- Unauthorized call recording enabled at the PBX or server level
- Network packet capture of unencrypted VoIP traffic
- Compromised SIP credentials enabling unauthorized call access
- Misconfigured call forwarding or monitoring features
Our Sweep Process
VoIP Infrastructure Review
Assessment of PBX, SIP trunks, and handset configuration.
Network Analysis
Review of network traffic for unauthorized packet capture.
Handset Inspection
Physical and software inspection of VoIP handsets.
Configuration Audit
Review of call recording, forwarding, and monitoring settings.
Reporting
Technical documentation of all findings and remediation steps.
Frequently Asked Questions
Confidential Inquiry
Schedule a Confidential TSCM Sweep
If you suspect surveillance or want to verify your environment is secure, professional detection is the only way to know with certainty.
All inquiries handled with complete discretion.