Message Types:
From device to server:
----------------------
100
datebook
1/22/2001
1/30/2001
event_id,lastmod_time,from,to,note
datebook
11230
Meet with customer in conference room 300
From server to device:
----------------------
100
datebook
1/22/2001
1/23/2001
1/24/2001
12230
980465587
1530
1630
Meeting maybe