Cisco NCS 540 Series, Руководство по установке оборудования

Страница: 17 / 60

Port Number Maximum
Interface Category
0/0 - 31 32 1GE
0/0 - 31, 1/0 - 1* 32 / 40*
1
10GE
0/24 - 31, 1/0 -
1* 8 / 16* 25GE
1/0 - 1 2 40GE
1/0 - 1 2 100GE
1
*4x10GE or 4x25GE option
Network Timing Interfaces
• BITS input or output—The BITS interfaces support clock recovery from either a T1 at 1.544 MHz or an
E1 at 2.048 MHz, configurable by software. BITS interface is provided through a standard RJ-48 connector
on the front panel.
• 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:
• GPS 10 Mhz input and output—10 MHz input for GPS Synchronization.
• GPS 1 PPS input and output—1 PPS input for GPS Synchronization.
External Alarm Inputs
The router supports four dry contact alarm inputs through an RJ-45 jack at the rear panel.
• Normally Open—indicates that no current flows through the alarm circuit and the alarm is generated
when the current is flowing.
Each alarm input can be provisioned as critical, major, or minor.
Console
The RS232 console port provides transmission (Tx), reception (Rx), and ground (Gnd).
Cisco NCS 540 Router Hardware Installation Guide
11
Cisco NCS 540 Router Overview
Network Timing Interfaces