Cisco XR 12404 Installation Manual page 74

Supplemental Bonding and Grounding Connections
•
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 (see
bonding and grounding receptacle, and is intended to satisfy the Telcordia NEBS
requirements for supplemental bonding and grounding connections.
Figure 3-4
Cisco XR 12404 Router Installation Guide
3-9
On Cisco XR 12404 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.
Cisco XR 12404 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
CLE AN CLAS S 1 LASE
R PROD UCT
LASER PROD
CONNE CTOR UKT DER KLASS
WITH ALCOHO PROD UIT LASE
WIPES BEFORE L E 1
CONNEC TING R DE CLAS SE
1
PROD UCTO LASER
TX
DE CLASS E 1
0
1
RX
2
3
ACTIVE
CARRIE R
RX PKT
GIG AB
MBU S
ALAR M FABR
FAIL
ENA BLE
CO NS OL
ID AT ED
Figure 3-4). It is also referred to as the NEBS
40C 48/ PO
S-S R-S C
IT RO UT
E PR OC
ES SO R
IC
SW IT CH
FA BR IC
Chapter 3 Installing the Router
OL-13830-02