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Connecting Timing Cables
Connecting Timing Cables
The sections describe how to connect timing cables to the Cisco NCS 4216:
When installing the cabling to the RSPs, we recommend that you leave a service loop of extra cabling
Note
sufficient to allow for fan tray removal.
Connecting Cables to the BITS Interface
The following steps describe how to connect a cable to the router BITS port:
SUMMARY STEPS
1. Confirm that the router is powered off.
2. Connect one end of the cable to the BITS port using a straight-through, shielded RJ48C-to-RJ48C cable.
3. Connect the other end to the BTS patch or demarcation panel at your site.
4. Turn on power to the 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 power to the router.
For information about the BITS port pinouts, see the Troubleshooting section.
Use of two BITS sources or a Y-cable is optional. Each BITS input port is routed to both RSPs, so that SETS
Note
device on each RSP has visibility to both BITS inputs.
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.
Connecting Cables to a GNSS Interface
The sections describe how to connect cables from the Cisco NCS 4216 to a GPS unit for input or output timing
of frequency:
Cisco NCS 4216 Hardware Installation Guide
52
Installing the Cisco NCS 4216
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