Cisco ASR 920 series Panduan Instalasi - Halaman 41
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Halaman Cetak
Installing the Cisco ASR 920 Series Router
DETAILED STEPS
Step 1
Confirm that the router is powered off.
Step 2
Connect one end of the cable to the BITS port using a straight-through, shielded RJ48C-to-RJ48C cable.
Step 3
Connect the other end to the BTS patch or demarcation panel at your site.
Step 4
Turn on the power to the router.
For information about the BITS port pinouts, see
To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety, connect
Warning
the BITS 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. 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
SUMMARY STEPS
1. Connect one end of a straight-through Ethernet cable to the GPS unit.
2. Connect the other end of the straight-through Ethernet cable to the ToD/1-PPS port on the Cisco ASR 920
Series Router.
DETAILED STEPS
Step 1
Connect one end of a straight-through Ethernet cable to the GPS unit.
Step 2
Connect the other end of the straight-through Ethernet cable to the ToD/1-PPS port on the Cisco ASR 920 Series Router.
To comply with the Telcordia GR-1089 NEBS standard for electromagnetic compatibility and safety, connect
Warning
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.
Note
For more information about GPS-port pinouts, see
Chapter 5, "Troubleshooting"
Chapter 5, "Troubleshooting."
Cisco ASR 920 Series Aggregation Services Router Hardware Installation Guide
Connecting Timing Cables
41