V1.1.4 (12/11/07) Changed Mute test method to fix false alarms. Removed option to adjust mute thresholds - now fixed in firmware. Changed and enabled M wire testing. Increased times for Tx Power test timing. Added RSSI level indication on diagnostic screen output. V1.1.3 (14/6/07) Added menu option to disable individual automatic tests. V1.1.2 Reset detected alarms from radio when manually change over invoked. Diagnostics now updated from both radios constantly. MX800 Dongle ID now read every 30 seconds. V1.1.1 8/12/06 Added dual antenna configuration V1.2.0 06/04/09 Added communications protocol to support T40 Option V1.2.1 11/05/09 Swap the active polarity state to match MX800 output Change the wording to Mute input polarity menu item to indicate it affects the input mute polarity reading in testing (nothing to do with output polarity) v1.2.2 17/01/13 Added more serial command handling to bring MXACU in line with latest MXTOOLS (P25 support, digital mute control etc) and T58. Note: there is no T88 support with T58 and MXACU (hardware does not support this) Added four T31 commands support