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Cisco Metro 1500 Series Hardware Installation Guide
78-10588-03
Chapter 1 Product Overview
System Modules
NEMI LEDs
Table 1-9 describes the functions of the LEDs shown in Figure 1-18.
For more information about NEMIs, refer to the Cisco Metro 1500 Series
Software Configuration Guide.
Device Element Management Interface
The device element management interface (DEMI) is a single-slot module that
resides in chassis A, C, E, and G. This interface provides status and configuration
capabilities of the extension frame in which it is installed to the corresponding
NEMI. A DEMI module is needed to administer systems with more than 8 WCMs
or 4 TDM4Es. A DEMI and a NEMI have to be linked by an external bus cable.
The DEMI module provides the following:
• Monitoring of the system bus in the extension chassis in which it is installed.
• Bidirectional communication to the NEMI to which it is physically attached
using an external bus cable. Management and configuration control
information is passed to and from the attached NEMI.
Systems with 24 to 32 channels require the installation of a second DEMI in
extension chassis C.
Table 1-9 NEMI LED Descriptions
LED Color Description
Power Green Power is on.
Error Red An error is occurring.
Err. Int.
BUS
Red An error on the internal bus is occurring.
Err. Ext.
BUS
Red An error on the external bus is occurring.
Receive Blinking green Link is active; traffic is on the network.
Link Green Link is established. The 10BASE-T
network link is established.