Overview

GL Communications offers a complete ED‑137 VoIP test and monitoring solution for Air Traffic Services Ground Voice Networks (AGVN). This solution is designed to simulate and test communication between key components such as Controller Working Positions (CWPs) and Ground Radio Stations (GRSs). Based on EUROCAE ED‑137 standards, it supports Ground-to-Ground and Air-to-Ground call flows and handles important features like Push-To-Talk (PTT), Squelch, Call Transfer, and Priority Calls. It helps ensure reliable communication and performance in real-world air traffic environments.

GL’s PacketScan™ is a real-time monitoring and protocol analysis tool designed for IP-based networks. It supports ED‑137 and ED‑138 standards and is used to capture and analyze live signaling and voice traffic over both IPv4 and IPv6. PacketScan™ can monitor all types of traffic, including voice, tones, digits, video, and fax. It measures key voice quality parameters such as Mean Opinion Score (MOS), jitter, delay, packet loss, duplicate packets, and out-of-sequence packets.

In Air-to-Ground calls, each PTT or Squelch action is treated as a separate session, providing fresh voice quality statistics for each transmission. Its GUI offers easy-to-read Summary and Detail Views with protocol ladder diagrams, and supports features like RTP header extension decoding and R2S Keep Alive monitoring as per ED‑137 specifications.

Multiple PacketScan™ probes can be deployed across the network to capture call activity at various locations. These probes send call detail records (CDRs) to a centralized database, which can be accessed through a web browser using GL’s NetSurveyorWeb™ system. This setup makes it easy for users to monitor performance, troubleshoot issues, and ensure that the air traffic communication systems meet safety and quality standards. The solution is ideal for Air Navigation Service Providers (ANSPs), equipment vendors, and system integrators involved in air traffic communication systems.