Port
Number
Maximum Port Number Interface
Category
0/2-0/33
32
25GE
0/0-0/1
2
40GE
0/2-0/9
8
50GE
0/0-0/1
2
100GE
0/0-0/1
2
200GE
0/0-0/1
2
400GE
Network Timing Interfaces
• 1PPS input or output and ToD input or output—This shielded RJ-45 interface is used for input or output
of time-of-day (ToD) and 1PPS pulses. ToD format includes both NTP and IEEE 1588-2008 time formats.
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:
• SMA Female 50 Ohm connector
• 50 Ohm antenna cable with SMA Male connector
Cisco Network Convergence System 540 Large Density Routers Hardware Installation Guide
11
Cisco NCS 540 Large Density Routers Overview
Network Timing Interfaces
