AT&T MERLIN LEGEND Release 3.1 Installation Manual page 269

Upgrading from the MERLIN II Communications System
3 Replace old modules and add new modules as specified on the Control
Unit Diagram of Form 1, System Planning.
See "Installing the Control Unit" in Chapter 2 if you need instructions.
4 Install the Release 4.0 processor module in the carrier.
See "Installing the Processor" in Chapter 2.
5 Perform a frigid start (System Erase) to ensure that system programming
is returned to default values.
Use
twice Yes
See Maintenance and Troubleshooting for more information on System Erase.
6 Program the system.
Restore the system programming from a system programming disk or
Translation Memory Card (Release 3.0 and later only), if available.
See "Restoring from the System Programming Disk" or "Restoring from
the Translation Memory Card," in Chapter 7.
If a disk or memory card is not available, see System Programming for
details on programming the system.
7 If applicable, program new features.
See System Programming for detailed programming procedures.
from the SPM Maintenance menu:
00 (Line 5, left button)
Upgrading the System
9–17