Cisco XR 12406 Installation Manual page 99

Chapter 3 Installing the Cisco XR 12406 Router
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Note
If the router is installed in a NEBS environment, we strongly recommend that you
connect the central office ground system or interior equipment grounding system
to the supplemental bonding and grounding point on the router chassis. This
grounding point consists of threaded inserts is located on the side of the chassis
near the back of the chassis
bonding and grounding receptacle, and is intended to satisfy the Telcordia NEBS
requirements for supplemental bonding and grounding connections.
Figure 3-5
CIS CO 12
GIGA BIT
SWI TCH
OL-13831-01
On Cisco XR 12406 routers configured for DC-input operation, the DC PDU
is equipped with a DC power connector block with wire-connection terminals
for connecting the negative lead (top terminal), the positive lead (middle
terminal), and the ground lead (bottom terminal). This is a safety feature.
The Cisco XR 12406 router grounding architecture conforms to the DC-I
(DC-isolated) method of grounding as described in Telcordia
GR-1089-CORE. A DC-I architecture means that there is no connection
between the DC return terminal and the frame ground. DC return and
frame ground are isolated from one another at the router.
Supplemental Bonding and Grounding Port for NEBS
Compliance
GIG ABIT
ROU TE
PRO CES
SOR
00 0
SERIES
ROU TER
Supplemental Bonding and Grounding Connections
(Figure 3-5). It is also referred to as the NEBS
Cisco XR 12406 Router Installation Guide
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