PTP 820S 1+1 HSB Switchover

Document Number FSB9068
Revision 001v01
Download the PDF version Application Global
Effective Date February 20, 2017
Expiry Date N/A
Warranty Service X High – Perform immediately
X Informational Medium – Perform at next scheduled maintenance
Customer Specific Low – Perform when system exhibits symptoms

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SUBJECT: PTP 820S 1+1 HSB Switchover

SYMPTOM: From Release 8.5.5, the PTP 820S in a 1+1 hot standby configuration may fail to respond properly to protection switchover triggers.

CURRENT STATUS OF INVESTIGATION: A software defect was found that prevents PTP820C units in a 1+1 HSB configuration from responding to protection switch triggers:

1. Loss of active unit – does not switch.
2. Lockout – does not switch.
3. Radio/Ethernet interface failure – does not switch.
4. Manual switch – does not switch.

The permanent fix for this issue will be available in the next release.

RESOLUTION: The recommended workaround is to downgrade the affected system to Version

Note: PTP820S systems running Version do not support Line Protection mode with LACP electrical GbE ports. Only Split Protection mode (connecting an optical GbE port of each unit to an optical splitter) is available with this software version.

If you have a question about anything contained in a Field Service Bulletin, please open a ticket via phone or the Cambium Support Center.

This Field Service Bulletin is issued by Cambium Networks in line with its policy of continual review and update of product quality, effectiveness and performance. Product performance or quality may be affected if the recommendations contained herein are not implemented, or not implemented as directed. This information is intended for personnel who have the proper tools, equipment and training to perform the tasks as described herein. Copyright © 2017 Cambium Networks, Inc.

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