We try to find out document regarding this, but unable to. Got link for the Hardware_System_Sizing_Recommendations_2015-07 , but this document doesn't specify for how much points at which scan rate what is the recommended configuration.
Please find screenshot as follows:
This screen-shot defines the specifications not sure for which one.
EDIT: Does anybgody have any experience of running the above mentioned interface configuration on Wide Area Network (WAN) ? The WAN timeout is 300 ms.