Page 142 of 174 Appendix A: Flash Download procedure
553-3001-216 Standard 5.00 January2002
PSDL Installation Procedure
Duringa flash download, the system downloads the contents of a
PSDL/PSWV file to anM3 900 set. This PSDL Installation Procedure can be
usedto loada new PSDL/PSWV file on the system in place of totally
reinstallingsyst em software. If there are concerns about system downtime in
regardsto performing software upgrades in cases where only a new
PSDL/PSWV file is needed, this process allows the replacement of the
PSDL/PSWV file only.

Installation procedures for Options 61C, 81, and 81C

Note: Thisprocedure does not include instructions on general software
installation nor does it cover installing new IODU/C cards. To use this
procedure,you must already be equipped with IODU/C cards that have
theX 11 software installed.
Usethe parallel reload procedures to convert from one X11 release of PSDL
filesto a later release, or to change the PSDL file within the same X11 release.
Parallelreloads can be done from either CPU. For the purposes of this
document, we begin with CPU 0.