Tynetec Advent xt Installation Manual page 59

36. CONTROLLER FIRMWARE LEVEL REPORT
The Advent xt controller can be interrogated via the DECT handset to confirm its firmware versions;
1. Press the LINE key and enter 8 1
2. Wait for the "Ready" prompt in the earpiece
3. Enter the code 4009 followed by the  key
4. Three firmware versions will be announced (see below) and logged on the system printer.
5. Wait for the "Ready" prompt in the earpiece
6. Press the LINE key to clear the connection
The 3 firmware levels are announced in the following order;
04 01
04 00
04 01
Contact Tynetec's customer support for advice on upgrades available.
Doc No. FM0410 issue M‐1 Page 59
A ARM Firmware Version 4.01A (Main Processor)
A PIC Firmware Version 4.00A (Co‐Processor)
A DSP Firmware Version 4.01A (Digital Speech Processor)