AT&T MERLIN LEGEND Release 3.1 System Planning Manual page 249

Upgrading
!
WARNING:
Installation or maintenance of this product by anyone other than qualified
personnel may damage or impair the product; your limited warranty does
not cover such damage. For details, see your limited warranty in
Appendix A, "Customer Support Information." Hazardous electrical
voltages are present inside this product.
This chapter contains information about upgrading the system to Release 4.0.
You can perform the following upgrades:
From Release 1.0 to Release 4.0
From Release 1.1 to Release 4.0
From Release 2.0 to Release 4.0
From Release 2.1 to Release 4.0
From Release 3.0 to Release 4.0
MERLIN II Communications System programming cannot be upgraded to this
communications system. Any upgrades from MERLIN II must be considered a
new installation to MERLIN LEGEND.
7
7–1
Upgrading