Cisco ONS 15200 Module Handbook, Release 1.0.1
Chapter 2, Network Control Board Module

Table of Contents

Network Control Board Module
2.1   Functional Description
2.2   Technical Specifications
2.3   Removal and Replacement

Network Control Board Module

This chapter describes the Cisco ONS 15200 Network Control Board (NCB) module.

2.1   Functional Description

Figure 2-1 shows the front panel of the NCB module.

Figure 2-1   Network Control Board front panel

2.1.1   Module Function

The NCB module is the central processor unit with all of its peripherals.

2.1.2   Alarm and Supervisory Subunit

The NCB hosts the Subnetwork Manager (SNM) software. The SNM supervises the CLIP modules and manages the communication channels to other management systems.

Note   The CLIP modules, when powered on, will self-synchronize with their respective mates. Traffic will be up without the assistance of an NCB.

2.1.3   Front-Panel Indicators, Connections, and Adjustments

Indicators for the NCB are visible on the front panel of the Communication Interface module (CIM).

Table 2-1 shows the NCB-module LEDs on the front panel of the CIM.

Table 2-1   CIM Panel NCB Signals

LED Color Significance


Critical or major alarm for the sub-network


Minor alarm or warning for the sub-network


NCB powered on

Note   When the red and yellow LEDs are flashing simultaneously, the NCB is rebooting. If the LEDs continue to flash for more than 30 to 45 seconds, the NCB has attempted to reboot the maximum number of allowed times and has entered boot mode. User attention is required. See the ONS 15200 Command Line Interface Manual.

A standard Ethernet connector (8-pole modular jack) is provided on the front panel of the NCB.

2.1.4   System Relationship

The SNM software on the NCB controls the Client Layer Interface Port (CLIP) modules on the internal bus.

The status of the NCB board and the entire sub-network can be read on the Communication Interface module (CIM) immediately beneath it.

The NCB board can be accessed from the Ethernet port on the front panel and in two different ways through the MA port on the CIM. Accessible using the RS-232 CIM adapter (P/N 72-2746) on the CIM, the EIA/TIA-232 interface requires the parameters in Table 2-2.

Table 2-2   EIA/TIA-232 Interface

Parameter Condition

Baud rate

19.2 kbaud/s

Data bits




Stop bits


Flow control


ASCII settings

Send line end with line feed

2.2   Technical Specifications

This section covers optical, electrical, environmental, and mechanical specifications for the NCB module. Default thresholds do not apply.

2.2.1   Optical Specifications

The NCB is not an optical device.

2.2.2   Electrical Specifications

Two independent external voltages are used:

  • Primary source -48 VDC
  • Secondary source -48 VDC

2.2.3   Environmental Specifications

Table 2-3 lists the normal climate-related limits.

Table 2-3   NCB Module Environmental Specifications

Parameter Condition Min. Max. Unit

Operating temperature

Nominal +25oC




Relative Humidity





2.2.4   Mechanical Specifications

Table 2-4 lists physical dimensions.

Table 2-4   NCB Module Physical Dimensions

Item Dimension


232 mm (9.1 in.)


215 mm (8.5 in.)


20 mm (0.8 in.)

2.3   Removal and Replacement

This section explains how to remove and replace NCB modules.

The NCB module is positioned in the Cisco ONS 15252 Multichannel Unit (MCU) as shown in Figure 2-2.

Figure 2-2   Mounting an NCB module

Procedure: Remove the Network Control Board

Step 1   Back up all NCB files to a laptop or PC as described in the Cisco 15200 Command Line Interface Manual.

Step 2   Disconnect the front panel Ethernet cable from the NCB module.

Step 3   Loosen the thumbscrews.

Note    The NCB module screws are equipped with retainers.

Step 4   Carefully remove the NCB module from the ONS 15252 MCU.

Step 5   If no immediate replacement of the NCB is anticipated, install a 20 mm (0.8")-wide dummy front where the NCB was removed from the ONS 15252 MCU.

Procedure: Replace the Network Control Board

Step 1   At the ONS 15252 MCU, remove the NCB dummy front or the defective NCB according to the instructions in the "Replace the Network Control Board" section.

Step 2   Align the replacement NCB module with the NCB module slot.

Step 3   Carefully insert the module into the slot.

Note    Make sure that the backplane connector and the NCB module connector are correctly mated and that no optical fibers are pinched.

Step 4   Tighten the thumbscrews.

Step 5   Connect the front-panel cable, if used.

Step 6   Using a CIM RS-232 cable, connect the laptop to the management access (MA) port on the Communication Interface module (CIM).

Step 7   Press Enter. The system responds with a logon prompt. Press Enter again. Because no password is needed, press Enter a third time.

Step 8   Create a user with administrator privileges:

Step 9   At the NCB:> prompt, type create user <user1> and press Enter. The system responds: Created <user1>. The user1:# prompt appears on the screen.

a. At the user1:# prompt, type password <password1> and press Enter to create a password for a new user.

b. Type privileges administrator and press Enter to assign administrator privileges to the new user.

c. Type exit to return to the NCB:> prompt.

d. At the NCB:> prompt, type commit user <user1> to finish adding a user with administrator privileges.

Step 10   Set the initial IP of the NCB module:

a. At the NCB:> prompt, type con sys and press Enter.

b. At the NCB:= prompt, type ipconf <ipaddr> <subnet> <gateway> and press Enter.

c. At the NCB:= prompt, type ex to return to the NCB:> prompt.

Step 11   Disconnect the CIM RS-232 adapter cable. The Subnetwork Manager on the NCB module now has an IP address and can be accessed directly at the Ethernet port on the NCB module front panel with the standard protocols (telnet, ftp, and http).

Step 12   Connect a crossover Ethernet cable to the PC and the Ethernet port on the NCB module. Start an ftp session on the host computer by typing the command ftp <ipaddr> at a command prompt (MS-DOS prompt).

Step 13   Log in using the administrator name and password you created in Step 8.

Step 14   Copy the files from the original NCB to the replacement NCB:

a. Type cd <foldername> to navigate to the PC directory where you copied the original NCB files.

b. Type bin and press Enter.

c. Type put snm.out and press Enter.

d. Type ascii and press Enter.

e. Type put qdbs.cfg and press Enter.

f. Type put <filename> and press Enter to move each remaining file to the replacement NCB.

2.3.1   Software Configuration

For information about software configuration, consult the Cisco ONS 15200 Command Line Interface Manual.