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M3900 Flash Download Page 247 of 504
Telephones and Consoles Description, Installation, and Operation
Table 38
Flash Download procedure matrix for Large Systems (Part 1 of 15)
Present
software
Upgrade
to
software
Keycode
required
M3900
telephones
Upgrade steps
24.25 25.08
Re-issue
Ye s Phase I 1. Call Nortel technical support to find out
how to obtain any necessary upgrades.
2. Follow the PSDL Installation
Procedure (see “PSDL installation” on
page 267).
4. Install the manufactured patches.
5. Download the firmware to the
telephones, following the Flash
Download procedure.
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 25.08 Re-issue procedure for
Phase 1 telephones (above).
The Release 25.08 Re-issue contains
M3900 Phase I firmware for M3902 and
M3905 telephones and Phase II firmware
for M3903 and M3904 telephones.
Follow the Flash Download process to
downgrade the M3900 Phase III
telephones to Phase I/II firmware.