Nortel Networks 9150 - Manual (Page 120)

90 Remote Gateway 9150 Installation and Administration Guide
Installing the Remote Gateway 9150 unit Standard 3.1
Removing and replacing the Remote Gateway
9150 unit cover
As you increase or change the voice processing capability of the Remote
Gateway 9150 unit, you need to perform one or more of the following tasks:
!
Install additional trunk interface modules.
!
Install additional DSP application modules.
These tasks require you to remove the Remote Gateway 9150 unit cover.
.
DANGER
Risk of electric shock
DISCONNECT THE POWER AS WELL AS THE TELCO 1
AND TELCO 2 CABLES BEFORE YOU PERFORM ANY
HARDWARE TROUBLESHOOTING OR ADD ISDN BRI
OR DSP APPLICATION MODULES TO THE REMOTE
GATEWAY 9150 UNIT.
If you do not disconnect the Telco 1 and Telco 2 cables from
the Remote Gateway 9150 unit, you can receive a lethal
shock if an external telco line is accidentally severed.