DEFINITY Enterprise Communication Server Release 9
Installation and Maintenance for Survivable Remote EPN
555-233-121
Issue 2
November 2000
About This Document
xii
Safety precautions
Safety precautions
When performing maintenance or translation procedures on the system, users
must observe certain precautions. Observe all caution, warning, and danger
admonishments to prevent loss of service, possible equipment damage, and
possible personal injury. In addition, the following precautions regarding
electromagnetic interference (EMI) and static electricity must be observed:
Electromagnetic interference
This equipment generates, uses, and can radiate radio frequency energy.
Electromagnetic fields radiating from the switch may cause noise in the
customer’s equipment, called electromagnetic interference (EMI). If the
equipment is not installed and used in accordance with this installation and
maintenance book, radio interference may result.
!
WARNING:
To maintain the EMI integrity of the system, maintenance personnel must
ensure that all cabinet panels, covers, and so forth, are firmly secured
before leaving the customer’s premises.
Static electricity
To prevent or reduce electrostatic discharge (ESD), always attach a wrist
grounding strap before working on switch components or handling circuit packs.
!
CAUTION:
Electrostatic discharge can damage or destroy circuit packs containing
integrated circuits (ICs).
The ESD wrist strap, cable assembly, and spare fuses are packed in a plastic bag
and placed in the top of the system cabinet. Use the ESD wrist strap when
troubleshooting, performing maintenance, or handling any circuit packs.
Remove/Install Circuit Packs
!
CAUTION:
When the power is on:
■
The control circuit packs cannot be removed or installed.
■
The port circuit packs can be removed or installed.