Overview

GL Communications provides robust test solutions tailored for legacy TDM-based Air Traffic Management (ATM) networks, addressing the ongoing need to support T1/E1 circuits alongside next-generation IP systems. Their 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, V.24/35, and other datacom interfaces, tProbe™ accurately captures and injects ATM voice traffic with high fidelity.

When integrated with GL’s MAPS™ ED 137 suite, tProbe™ acts both as a voice/media endpoint and a test probe, enabling hybrid testing environments where IP signaling (handled by MAPS™) intersects with TDM media layers. This setup supports real-world quality and timing tests including PTT (Push-To-Talk) and squelch events while maintaining TDM packet accuracy through precise timestamping and jitter control. For comprehensive testing, GL’s Synchronous Trunk Record/Playback (STRP) application can be used to capture and replay multichannel TDM traffic—allowing users to recreate real-world scenarios, validate timing behavior, and perform regression testing across legacy interfaces.

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 the evolution of ATM infrastructure.