If the Power LED blinks green, one of the two power supplies has failed or is not installed.
If the Power LED is green but the unit has failed and no other LEDs are on, then the internal power
regulating circuit may have failed. Contact the Cisco Technical Assistance Center (TAC) immediately
If the Fail LED is red, then a major trouble condition exists in the Cisco ONS 15501 hardware. Contact
the Cisco Technical Assistance Center (TAC) immediately for assistance.
Infra-red laser energy may be present on the cable connected to the receiving (Input) connector,
at the transmitting (Output) optical fiber connector, or the monitoring (Optical Monitor) connector.
To avoid potential damage to the eyes, do not look directly into this connector or cable. When an
optical cable is not attached, place the supplied protective cap over the connector and the optical
If the LOS (loss of signal) LED is yellow, then the input optical signal has disappeared or has fallen
below the detection level.
If you have forgotten your passwords, use the
The restore command can only be entered from a session on the serial port, not from a Telnet session.
The default user password is edfa and the default master password is edfa1. For security reasons, you
should change both passwords as soon as possible. Log in with master privileges and use the
If the problem exists after you review the Cisco ONS 15501 status and attempt to reprovision the
amplifier, contact the Cisco Technical Assistance Center (TAC). (See the Preface for contact
78-14134-01, Release 1.0
Check that primary and user-optional external power is available and that the DC power wiring is
properly and firmly connected to the appropriate screw terminals.
Check that the external DC supply power switch is turned to the on position.
Check to see that the input optical cable is securely seated in its connector.
Connect an optical power meter on an optical spectrum analyzer to the Output Monitor optical
connector and check for proper level of the outgoing signal.
Check with the distant transmitting end to determine if the signal is leaving that site at the proper
and set-master-pwdcommands to change the passwords.
command to reset the passwords to the defaults.
Cisco ONS 15501 User Guide