# NTP servers: S200 and S300 Series Internal Week Number Rollover event on September 18, 2022

**URL:** <https://community.ntppool.org/t/ntp-servers-s200-and-s300-series-internal-week-number-rollover-event-on-september-18-2022/2491>\
**Category:** Server operators\
**Created:** [July 27, 2022, 7:41pm UTC](https://community.ntppool.org/t/ntp-servers-s200-and-s300-series-internal-week-number-rollover-event-on-september-18-2022/2491 "2022-07-27T19:41:38Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![stevesommars](https://sea2.discourse-cdn.com/flex016/user_avatar/community.ntppool.org/stevesommars/32/2075_2.png) [@stevesommars](https://community.ntppool.org/u/stevesommars)\
**Post date:** [July 27, 2022, 7:41pm UTC](https://community.ntppool.org/t/ntp-servers-s200-and-s300-series-internal-week-number-rollover-event-on-september-18-2022/2491/1 "2022-07-27T19:41:38Z")

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Some Microchip/Microsemi/Symmetricom/… NTP servers will experience a GPS Week Number rollover in September. The date will be in error by 1024 weeks. If you email me at [stevesommarsntp@gmail.com](mailto:stevesommarsntp@gmail.com) I will forward the complete bulletin.

Microchip Corporation  
November 6, 2020  
Field Service Bulletin (FSB) No: 098-50620-106 Rev. A  
Subject: SyncServer S200 and S300 Series Internal Week Number Rollover event on September 18, 2022.  
Models Affected:  
SyncServer S200, S250, S300 and S350 SyncServers shipped from approximately 2007 into 2016.