User manual

Chapter 2. Installation
2-2 E&M+ Dual Voice Option ModuleUser Manual 61200105L3-1A
INSTALLING THE OPTION MODULE
Modules With Hot Replaceable Label on Back Panel
Power to the TSU 100/120/600 may be ON when installing or
removing the option module with a Hot Replaceable label on the
back panel.
Modules Without Hot Replaceable Label on Back
Panel
Power to the TSU 100/120/600 must be OFF when installing or
removing the option module without a Hot Replaceable label on the
back panel.
Before installing the option module, check the back panel for the
presence or absence of a Hot Replaceable label on the back panel.