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Originally Posted by Janak Parekh
This can't quite be accurate, because Server/Exchange ActiveSync is done entirely over HTTPS.
The question is if EAS can use two HTTPS connections -- one over GPRS for notification, and one over WiFi to actually perform the sync. I'm guessing no, and that the icons are wrong.
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I've just stumbled in here from a Google search - I have an iPAQ hw6915 set up with push email and it seems to work quite well, except for the WLAN/GPRS integration - or lack of it!
EAS with the hw6915 (or any other GPRS/WLAN WM5 phone?) offers the potential for big savings versus BB as I am sure that a significant proportion of the traffic is delivered when users are in range of a WLAN.
Right now if you set EAS to "as items arrive" then all traffic seems to be routed to GPRS regardless of whether WLAN is active or not, but if you change the schedule to any specific interval then it seems to route over WLAN if available.
The gotcha is that once the iPAQ goes into standby (5 minutes max when on batteries) the WLAN is gone and it reverts to GPRS, and when it wakes up it starts syncing (over GPRS) before the WLAN is back up. Since the minimum specific interval for sync is 5 minutes, you are almost guaranteed to be in standby!
Wouldn't it be much better if you could use GPRS for notification as items arrive and WLAN (if available) for the sync, with a short delay to allow any WLAN connection to come back up?