# Wismo228 data cache memory

**URL:** <https://forum.sierrawireless.com/t/wismo228-data-cache-memory/4121>\
**Category:** Legacy AirPrime modules\
**Created:** [January 21, 2010, 9:35am UTC](https://forum.sierrawireless.com/t/wismo228-data-cache-memory/4121 "2010-01-21T09:35:26Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Hanker](https://avatars.discourse-cdn.com/v4/letter/h/278dde/32.png) [@Hanker](https://forum.sierrawireless.com/u/Hanker)\
**Post date:** [January 21, 2010, 9:35am UTC](https://forum.sierrawireless.com/t/wismo228-data-cache-memory/4121/1 "2010-01-21T09:35:26Z")

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Hi All:  
There are some questions about wismo228, what is the size of the data cache memory,how long does the data keep on it?  
I can’t find the describe at “WISMO228\_Product\_Technical\_Specification\_and\_Customer\_Design\_Guideline-Rev00” and “WISMO - WIreless Standard MOdem”