IP/VoIP Protocol Simulators

Core Network Simulators

Test Solutions for Legacy TDM Air Traffic Management Networks

Emulate, generate, and analyze voice and data over T1/E1 and other TDM interfaces with high fidelity.

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legacy TDM-based Air Traffic Management (ATM) networks

Overview

GL Communications provides robust test solutions for legacy TDM-based Air Traffic Management (ATM) networks, addressing the need to support T1/E1 circuits alongside next-generation IP systems. tProbe™ platform, available in USB, PCIe, and rack-mounted formats, enables emulation, generation, and analysis of voice, digits, tones, fax, and data over TDM interfaces. With software-selectable T1/E1 ports and support for FXO/FXS, SS1/SS4, V.24/35, and other datacom interfaces, tProbe™ captures and injects ATM voice traffic with high fidelity.

When integrated with GL’s MAPS™ ED-137 suite, tProbe™ functions both as a voice/media endpoint and a test probe, enabling hybrid testing where IP signaling (handled by MAPS™) intersects with TDM media layers. This setup supports real-world quality and timing tests, including Push-To-Talk (PTT) and Squelch events, while maintaining TDM traffic accuracy through precise timestamping.

By deploying multiple tProbe™ units alongside MAPS™ ED-137 emulators, organizations can perform end-to-end legacy-to-IP migration testing, validating call flows, signaling integrity, and voice quality. The combination of TDM emulation, synchronized playback, and ED-137 protocol testing ensures full visibility across mixed network environments. These tools are ideal for Air Navigation Service Providers (ANSPs), OEMs, and system integrators aiming to maintain operational readiness and compliance throughout ATM infrastructure evolution.



Key Features

  • Supports T1/E1 and legacy TDM circuits alongside IP-based ED-137 networks
  • tProbe™ enables emulation, generation, and analysis of voice, digits, tones, fax, and data over TDM
  • Supports FXO/FXS, SS1/SS4, V.24/35, and other datacom interfaces
  • Integrates with MAPS™ ED-137 for hybrid testing of TDM media and IP signaling
  • Maintains precise timestamping, jitter control, and PTT/Squelch event accuracy
  • STRP application for synchronized multichannel TDM record/replay
  • Scalable deployment with multiple tProbe™ units for end-to-end testing

Benefits

  • Ensures reliable legacy-to-IP migration for Air Traffic Management systems
  • Validates call flows, signaling integrity, and voice quality across mixed networks
  • Supports real-world scenario testing with timing and quality accuracy
  • Reduces risk during ATM infrastructure upgrades
  • Provides full operational visibility across legacy and next-gen systems

Use Cases

  • Hybrid Air-to-Ground and Ground-to-Ground call testing across TDM and IP
  • Regression testing for legacy ATM systems during IP migration
  • Recorder verification with multichannel TDM playback
  • Performance and timing validation of PTT/Squelch and other critical events
  • Multi-site end-to-end monitoring in mixed TDM/IP networks