Sutron Corporation X-Link Operations & Maintenance Manual, Rev 1.63 5/24/2016 pg. 61
5.7.
Message Check
A message check is the process of using X-Link's modem to see if there are any
messages waiting.
For IRIDIUMLink, this means getting in touch with the gateway.
This does incur charges: Every message check will cost money!
For CDMA, HSPA, and GPRSLink, this means talking to the cell tower to see if
there are any SMS waiting.
Message checking is controlled by a user setting called
Msg Interval
. This interval
defaults to 24:00:00 and has a range of 00:01:00 to 24:00:00.
Message checking happens even if recording is off!
Message checking will NOT happen if the transmission interval is faster than
Msg
Interval
. This is because
every transmission already includes a message check.
If a unit is setup with a
Tx Interval
of 1 hour, and a
Msg Interval
of 15 minutes:
00:15:00 - Message Check
00:30:00 - Message Check
00:45:00 - Message Check
01:00:00 - Scheduled Transmission - No additional message checking
required
00:15:00 - Messages Check
With a
Tx Interval
of one hour and a
Msg Interval
of 24 hours, no additional
message checking occurs:
23:00:00 - Scheduled Transmission - No additional message checking
required
00:00:00 - Scheduled Transmission - No additional message checking
required
01:00:00 - Scheduled Transmission - No additional message checking
required
The message check serves several purposes:
It prevents the customer from permanently severing the remote connection.
