Cisco Systems ONS 15327 2.6.177 SYNC-FREQ

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Cisco ONS 15327 Troubleshooting Guide, R3.4

March 2004

Chapter2 Alarm Troubleshooting

Alarm Procedures

Step 1 To clear the condition, clear alarms related to failures of the primary source, such as a SYNCPRI alarm

(see page 2-117) or a SYNCSEC alarm (see page 2-117).

Step 2 If the condition does not clear, log onto http://www.cisco.com/tac for more information or call TAC

(1-800-553-2447).

2.6.177 SYNC-FREQ

•Not Alarmed (NA), Non-Service Affecting (NSA)

The Synchronization Reference Frequency Out Of Bounds (SYNC-FREQ) condition is repo rted against

any reference that is out of the bounds for valid references. The log i n node fa ils t he re fe ren ce a nd

chooses another internal or external reference to use.

Warning

Invisible laser radiation might be emitted from the end of the unterminated fiber cable or connector.

Do not stare into the beam directly with optical instruments. Viewing the laser output with certain

optical instruments (for example, eye loupes, magnifiers, and microscopes) within a distance of 100

mm might pose an eye hazard. Use of controls or adjustments or performance of procedures other than

those specified might result in hazardous radiation exposure.

Caution Always use the supplied electrostatic discharge wristband when working with a powered ONS 1532 7.

Plug the wristband cable into the ESD jack located between the top high-speed and XTC slots.

Step 1 Use an optical test set to verify the timing frequency of the line or BITS timing source and ensure that

timing falls within the proper frequency.

For specific procedures to use the test set equipment, consult the manufacturer. For BITS, the proper

timing frequency range is approximately –15 ppm to 15 p pm. For o pti cal l ine ti ming , the pr oper

frequency range is approximately –16 ppm to 16 ppm.

Step 2 If the reference source frequency is not outside of bounds, complete the “Physically Replace a Card”

procedure on page 2-130 for the XTC card.

Note When replacing a card with an identical type of card, no additional CTC provisioning is

required.

Note The active XTC takes up to 30 minutes to transfer the system software to the newly installed

XTC. Software transfer occurs in instances where differ ent sof twar e versions exist on t he two

cards. During the transfer operation, the LEDs on the XTC flas h f ail a nd then the act i v e/s tan db y

LED flashes. When the transfer completes, the XTC reboots and goes in to st and by mode af ter

approximately three minutes.