6
SmartNode 10200A Series Quick Start Guide
4.3 Optical Interface (OC3/STM-1)
Figure 5.
Connecting to the PSTN via the optical interface
5.0 Grounding the Equipment Chassis
As a standard safety practice, the chassis of the SN10200A series gateway must be
properly grounded to protect against any contact with an electrical fault condition. It is
recommended that the chassis be connected to an earth ground. If the SN10200A
series gateway is mounted in an equipment rack, then the ground cable must be con-
nected from the ground lug of the SN10200A series gateway ground to the ground bar
of the equipment rack. If more than one SN10200A series gateway is installed in an
equipment rack, each SN10200A series gateway must be grounded directly to the
equipment rack ground bar.
5.1 Guidelines
•
Use 10 AWG (minimum) stranded ground wire.
•
Terminate equipment side of ground wire with a #10 ring terminal.
•
Do NOT
daisy chain the ground between equipment. Use a ground bus bar, as
shown in
Figure 6.
Chassis ground connection
To avoid the risk of fire, electric shock, or personal injury do not apply
power to the SN10200A before the equipment chassis ground has been
installed.
MGMT0
ETH
VOIP
0
1
0
1
TMS
0
1
OC3/
S
TM-1
WARNING
G
r
o
un
d Ba
r
Ea
r
th G
r
o
un
d
MGMT0
ETH
VOIP
0
1
0
1
TMS
0
1
