Meridian M3902 Description And Installation page 115

Table 15
Flash Download procedure matrix for small systems (Part 2 of 5)
Present Upgrade to
software software
25.15
Re-issue
25.08 25.08
Re-issue
M3900 Series Meridian Digital Telephones Description, Installation and Administration
Appendix A: Flash Download procedure
Keycode M3900
required telephones
Release 2
Yes Release 1;
Release 2
No Release 1
Page 115 of 174
Upgrade steps
Note: This is not a standard process.
M3900 Release 2 phones should not
be configured on a Release 24.2x
system.
1. Follow the small system Release
24.2x to Release 25.08 Reissue
procedure for Release 1
telephones (above).
The Release 25.08 Reissue
contains M3900 Release 1
firmware. Follow the Flash
Download process to downgrade
the M3900 Release 2 phones to
Release 1 firmware
Follow the standard software order
process.
1. Download software from the
web.
2. Follow "PSDL Installation
Procedure" on page 142.
3. Install manufactured patches
4. Download firmware to sets,
following the Flash Download
procedure.