CHAPTER 3 TERMINALS
Issue 5
UNIVERGE NEAX 2000 IPS General Description
Page 199
6
Installation, Programming and Maintenance
6.1 Operating Environment
Operating Condition
Temperature Relative Humidity
Normal Operations
5
o
C - 30
o
C
41
o
F - 86
o
F
15% - 65%
Non-Condensing
Short Periods
**
-0
o
C - 40
o
C
32
o
F - 104
o
F
15% - 90%
Non-Condensing
During Storage and Transit
-18
o
C - 50
o
C
0
o
F - 122
o
F
8% - 90%
Non-Condensing
**Not to exceed 72 consecutive hours or 15 days in a year.
6.2 Grounding Requirements
The system grounding must have a specific ground resistance and AC noise level, and is
to be connected to a predetermined terminal in the PBX.
Standard grounding requirements are as shown below:
Communication grounding : Less than 10 ohm
Protective ground for PIM : Less than 10 ohm
Note: The AC ripple on these various grounds should be less than 0.5 Vp-p.
CAUTION
Grounding circuit continuity is vital for safe operation of telecommunication equipment.
Never operate this equipment with the grounding conductor disconnected!
The following specific requirements apply to ground wiring:
An equipment grounding conductor that is at least as large as the ungrounded branch-
supply conductors is to be installed as part of the circuit that supplies the PBX. Bare,
covered, or insulated grounding conductors are acceptable. Individually covered or
insulated equipment grounding conductors shall have a continuous outer finish that is
either green, or green with one or more yellow stripes. The equipment grounding
connector is to be connected to ground at the service equipment.
The attachment-plug receptacles in the vicinity of the PBX are all to be of a grounding
type, and the equipment grounding conductors serving these receptacles are to be
connected to earth ground at the service equipment.
