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Page 248 of 504 M3900 Flash Download
553-3001-367 Standard 3.00 August 2005
25.15
Re-issue
Ye s Phase I Follow the standard software order
process.
Phase II,
Phase III
Note: This is not a standard process.
There should not be M3900 Phase II and
Phase III telephones on a Release 24.2x
system.
1. Follow the Large System Release
24.2x to 25.15 Re-issue procedure for
Phase 1 telephones (above).
The Release 25.15 Re-issue contains
M3900 Phase I firmware for M3905
telephones and Phase II firmware for
M3902, M3903, and M3904 telephones.
Follow the Flash Download process to
downgrade the M3900 Phase III
telephones to Phase I/II firmware.
Table 38
Flash Download procedure matrix for Large Systems (Part 2 of 15)
Present
software
Upgrade
to
software
Keycode
required
M3900
telephones
Upgrade steps