Cisco ASR 920 series Manual de instalación - Página 34
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Connecting a Cisco ASR 920 Series Router to the Network
ports as described in GR-1089-CORE) and require isolation from the exposed OSP cabling. The
addition of Primary Protectors is not sufficient protection in order to connect these interfaces
metallically to OSP wiring. Statement
Connecting Cables to a GPS Interface
The following sections describe how to connect cables from the Cisco ASR 920 Series Router to a GPS
unit for input or output timing of frequency:
•
Connecting a Cable to the ToD Interface
Step 1
Connect one end of a straight-through Ethernet cable to the GPS unit.
Connect the other end of the straight-through Ethernet cable to the ToD/1-PPS port on the
Step 2
Cisco ASR 920 Series Router.
To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety,
Warning
connect the ToD ports only to intra-building or unexposed wiring or cable. The intrabuilding cable
must be shielded and the shield must be grounded at both ends. The intra-building port(s) of the
equipment or subassembly must not be metallically connected to interfaces that connect to the OSP
or its wiring. These interfaces are designed for use as intra-building interfaces only (Type 2 or Type 4
ports as described in GR-1089-CORE) and require isolation from the exposed OSP cabling. The
addition of Primary Protectors is not sufficient protection in order to connect these interfaces
metallically to OSP wiring.
For more information about GPS-port pinouts, see
Note
Connecting Ethernet Cables
The Cisco ASR 920 Series Router interface modules support RJ-45 and Ethernet SFP ports. For
instructions on how to connect cables to Ethernet SFP ports, see the
page
The RJ-45 port supports standard straight-through and crossover Category 5 unshielded twisted-pair
(UTP) cables. Cisco does not supply Category 5 UTP cables; these cables are available commercially.
Warning
To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety,
connect the Gigabit Ethernet ports only to intra-building or unexposed wiring or cable. The
intrabuilding cable must be shielded and the shield must be grounded at both ends. The intra-building
port(s) of the equipment or subassembly must not be metallically connected to interfaces that connect
to the OSP or its wiring. These interfaces are designed for use as intra-building interfaces only (Type
2 or Type 4 ports as described in GR-1089-CORE) and require isolation from the exposed OSP cabling.
The addition of Primary Protectors is not sufficient protection in order to connect these interfaces
metallically to OSP wiring.
Follow these steps to connect a cable to a copper Gigabit Ethernet port:
Cisco ASR 920 Series Aggregation Services Router Hardware Installation Guide
3-34
Connecting a Cable to the ToD Interface, page 3-34
3-35.
Chapter 3
Installing the Cisco ASR 920 Series Router
Chapter 5, "Troubleshooting."
Connecting Cables to SFP Modules,
OL-32751-01