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Chapter 1 Overview
M15-155 Installation Guide 3
Front Panel Components
Table 1 M15-155 Front Panel Diagnostic LEDs
LED
Indicator
Description State Meaning
OPR Module
Operational
Status
ON
OFF
Blink
Module is OK
Module is not operational
Module Fault
BIT Built-In Test ON
OFF
BIT in progress
BIT not in progress
NMA Network
Management
Agent
ON
OFF
This module is the Master Agent
Not currently the Master Agent
ETM For future
use
– –
SRV For future
use
– –
Function LED* Port LED (1 … 15, CPU)
LNK
(default)
Port Status ON
OFF
1 Blink
Port is enabled and Link OK
Port is disabled
Link failure (LOS or RDI)
Tx Transmit to
line
ON
OFF
Data transmitted to line
No activity on port
Rx Receive from
line
ON
OFF
Data received from line
No activity on port
LOS Loss of Signal ON
OFF
Loss of Signal State
No LOS
RDI Remote
Defect
Indicator
ON
OFF
Remote defect (RDI) detected
No RDI
* Use the
3
3
4
4
pushbuttons on the front panel to select the
Function to be displayed on the Port LEDs.
Table 2 M15-155 Front Panel Ports
Port/Connector Function
Ports 1 and 2 M15-155F – ATM OC-3 MMF ports
M15-155SF and M15-155MS – ATM OC-3 SMF ports
Ports 3 … 15 M15-155F and M15-155MS – ATM OC-3 MMF ports
M15-155SF – ATM OC-3 SMF ports
Console
Connector
Terminal setup of M15-155