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M3900 Flash Download Page 231 of 504
Telephones and Consoles Description, Installation, and Operation
25.15
Re-issue
Ye s Phase I Follow the standard software order
process.
Phase II Note: This is not a standard
process. M3900 Phase II/III
phones should not be configured
on a Release 24.2x system.
1. Follow the Small System
Release 24.2x to Release 25.15
Re-issue procedure for Phase I
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
phones to Phase I/II firmware.
Table 37
Flash Download procedure matrix for Small Systems (Part 3 of 18)
Present
software
Upgrade to
software
Keycode
required
M3900
telephones
Upgrade steps