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M3900 Flash Download Page 235 of 504
Telephones and Consoles Description, Installation, and Operation
25.15
Re-issue
Ye s Phase I,
Phase II
Follow the standard software order
process.
Phase III Note: This is not a standard
process. M3900 Phase III phones
should not be configured on a
Release 25.08 system.
1. Follow the Small System
Release 25.08 to Release 25.15
Re-issue procedure for Phase I
and Phase II telephones (above).
The 25.08 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 phones to
Phase I/II firmware.
Table 37
Flash Download procedure matrix for Small Systems (Part 7 of 18)
Present
software
Upgrade to
software
Keycode
required
M3900
telephones
Upgrade steps