CERTIFICATION APPROVAL: TSO Authorization (see Approval section of SSB 1356 for details)

COMPLIANCE

Optional

PURPOSE

This Service Bulletin announces the availability of GTN 6XX/7XX COM Software Version 2.12 and GMA 35 ARC DB Version 3.08.

GTN 6XX/7XX COM Software Version 2.12 contains the following changes from Version 2.11:

COM Software Version 2.12 provides improved squelch control over Version 2.11. It is helpful only in those installations that experience open squelch (receiver too sensitive) after utilizing the COM Monitor Mode.

GMA 35 ARC Software Version 3.08 contains the following changes from Version 3.05:

Mutes telephone audio during an aural alert.

DESCRIPTION

This software service bulletin describes the process for upgrading the GTN 6XX/7XX Series Unit’s COM Software to Version 2.12 and other software versions listed above in the Purpose Section of this bulletin.