Field Service Bulletin

PTP 820S 1+1 HSB Switchover

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Document Number:

FSB9068

Revision:

001v01

Application:

Global

Effective Date:

February 20, 2017

Expiry Date:

N/A

Bulletin Type:

Warranty Service

Informational

Customer Specific

Severity Recommendation:

High – Perform immediately

Medium – Perform at next scheduled maintenance

Low – Perform when system exhibits symptoms

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 8.3.0.0.0.495.

Note: PTP820S systems running Version 8.3.0.0.0.495 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 questions or concerns, please contact Cambium Technical Support at the following: https://www.cambiumnetworks.com/support/contact-support/

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