Test Ground-Ground per EUROCAE ED137

Featured Product from GL Communications, Inc.

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MAPS™ ED137 Telephone simulates the functions of Controller Working Position (CWP) in Ground-to-Ground telephone calls. The product supports transmission and detection of various RTP audio traffic such as real-time audio, voice file, digits, single tone and dual tones. The MAPS™ profile editor feature allows users to easily configure multiple CWPs profiles, allowing to simulate multiple CWP entities.

GL tools for signalling emulation and voice quality testing offer an end-to-end test solution for testing connections from the radio interfaces to the Controller Working Position (CWP) and recording voice communications in the ATM network. GL’s Air Traffic Management Solution also includes MAPS™ ED-137 Recorder Emulators and MAPS™ ED-137 Radio Emulators.

Signalling Simulation

  • Emulates ED-137/2B Telephone interface at CWP endpoints.
  • Enhanced to support multiple CWP endpoints simulation
  • Portable, easy to configure and use during in-the-field installation, system configuration/ test and commissioning
  • Supports multiple Profiles (Users/End points) from single node.
  • Supports hundreds of simultaneous calls and load generation can be automated completely along with traffic.

Supported Call Types

  • Instantaneous Access
  • Priority Direct/Indirect Access
  • Routine Tactical Direct/Indirect Access
  • Routine Strategic Direct/Indirect Access
  • Routine General Purpose Direct/Indirect Access
  • Position Monitoring (Combined A/G and G/G, A/G only, and G/G only) Call


  • Supports various traffic actions on the call such as Playback to Speaker, Send & Record audio file, Generate and detect inband digits, single tone and dual tone.
  • Supports ED137 defined codecs - G.711 (mu-Law and A-Law) and G.729
  • Supports User-defined and automated traffic actions on the call.
  • Applies impairments to the traffic such as Packet Loss, Latency, Duplicate and Out of sequence.
  • Provides aggregated voice quality statistics such as MOS/R-Factor, Packet Loss, Duplicate and out of sequence packets.


  • Fully integrated, complete test environment for Air Traffic Management.
  • Supports testing CWP, VCS, GRS (or RMG), and VRS.