June 2, 1997
Inmarsat, the global provider of mobile satellite
communications, has awarded Square Peg Communications Inc. a contract
valued at $214,861 CDN to deliver a two channel Aeronautical Earth
Station (AES) Simulator. The AES Simulator (AESS) will assist GES
manufacturers in developing and testing their Aero I/H+ upgrades. The
AESS is an open platform which allows the user to generate test
scripts to simulate the complex behaviour of a real AES subject to
error scenarios resulting from invalid or inopportune messages. The
modular design of the AESS coupled with its programmable digital
signal processing (DSP) based modem architecture allows for
straightforward incorporation of new channel types, providing
Inmarsat with an ongoing platform for testing future aeronautical
The AESS will perform the following functions:
Receive P-channel signals, transmit R-channel signals and transmit/receive reduced rate C-channel signals, at 70 MHz IF.
Provide script file based support for:
verifying receipt of SUs,
verifying protocol timing,
prompting the user to perform actions.
Provide expanded script file based support for P/R/C-channel signaling for AES log-on/off and call control.
Support the coordination of scripts running on multiple AESS Channel Units, including the sharing of a common P/R-channel resource.
Provide a complete reduced rate Aero-I/H+ C-channel audio path from a 2Wire telephone.
Square Peg's five channel Aero-Evolution Test GES, which uses similar technology, is installed at Teleglobe Canada's Laurentides earth station at Weir, Quebec.
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