Appendix A: Connectors and LEDs
7750 SR-a4 and SR-a8 Installation Guide 143
2 Pwr / Stat Power Blue (solid): Power to the CPM-a is on
Unlit: There is no power to the CPM-a or the power is faulty.
Status Green (slow blink): The CPM-a is loading firmware and running CPU
diagnostics.
Green (solid): The CPM-a boot/load process is complete and is
operational as the primary CPM-a.
Green (slow blink): The CPM-a boot/load process is complete and is
operational as the secondary CPM-a.
Unlit: The CPM-a is operationally down and administratively down.
3 DTE — Set the switch to DTE when connecting to the serial port of a PC with a
null modem cable. When the switch is set to DTE, the Console port acts
as a data terminal equipment (DTE) serial port.
DCE — Set the switch to DCE when connecting to the serial port of a PC with a
straight-through cable. When the switch is set to DCE, the Console port
is acting as a data communications equipment (DCE) serial port.
4 Console Port The Console port uses an RJ-45 connector that enables a connection to a
terminal for performing router monitoring and configuration operations.
Refer to Console Port Pinouts RS-232 DCE Mode on page 213 for pinout
assignments.
5 OES Port RJ-45 Optical Extension Shelf port. The OES port is reserved for future
use.
Table 58: 7750 SR-a CPM-a Connector and LED Descriptions (Continued)
Key Label/Part Sub-
category
Description
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