Network Timing Interfaces; Gnss Receiver; Gnss Receiver Rf Input Requirements - Cisco NCS 540 Hardware Installation Manual

Cisco NCS 540 Large Density Routers Overview
Category
25GE
40GE
50GE
100GE
200GE
400GE

Network Timing Interfaces

• 1PPS input or output and ToD input or output—This shielded RJ-45 interface is used for input or output
The same RS422 pins for 1PPS and TOD are shared between input and output directions. The direction for
each can be independently configurable through software.
Use an SMB connector on the front panel for the following:
• Timing 10Mhz input and output—10MHz input for timing synchronization
• Timing 1 PPS input and output—1 PPS input for timing synchronization

GNSS Receiver

The chassis has in-built GNSS receiver with SMA connector present at the front panel. GNSS supports the
following constellations:
• GPS
• Galileo
• Glonass
• BeiDou

GNSS Receiver RF Input Requirements

• The antenna connector specification is as follows:
Maximum Port Number Interface
32
2
8
2
2
2
of time-of-day (ToD) and 1PPS pulses. ToD format includes both NTP and IEEE 1588-2008 time formats.
• SMA Female 50 Ohm connector
• 50 Ohm antenna cable with SMA Male connector
Cisco Network Convergence System 540 Large Density Routers Hardware Installation Guide
Port
Number
0/2-0/33
0/0-0/1
0/2-0/9
0/0-0/1
0/0-0/1
0/0-0/1
Network Timing Interfaces
11