Technical data

Installing the ATMSpeed/155 Modules
893-01047-A 2-19
Two-port versions of the ATMSpeed/155 module have three LEDs on each
module, as shown in Figure
2-30. Table 2-3 lists the meaning of each LED.
Figure 2-30. Two-port ATMSpeed/155 module LEDs
Table 2-2. ATMSpeed/155 MDA MCP module LED definitions for the
10BASE-T MCP port
LED name Meaning
RX Turns on as packets are received on the port.
TX Turns on as packets are transmitted on the port.
L Turns on when the 10BASE-T link is functioning correctly.
Table 2-3. Two-port ATMSpeed/155 LED definitions
LED name Meaning
In Service Turns on when the receive fiber receives valid SONET framing.
Turns off to indicate loss of signal, loss of frame, or out of frame.
Enabled Remains on while port is enabled from network management.
Activity Turns on when the port is engaged in non-idle cell transfer.
In Service
Enabled
Activity
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