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GPRS status
Sarian MR2110 LED Status

* - Steady On
O - Off
® - Flashing or Flickering
¤ - Single Flash, 3 second pause
¥ - Double Flash, 3 second pause
(An unpopulated box means that the status of that LED is inconsequential to the situation described)

ON
LAN
NET
SIM
DAT
DTE
GPS
GSM
 Description
 
O
O
O
O
O
O
O
O
 Sarian Powered Off
*
 
O
O
®
O
O
O
 Whilst Booting: Loading bootstrap (About 5seconds)
*
 
O
®
®
O
O
O
 Whilst Booting: Decompressing main software image (SIM Flashes quickly for about 5 seconds)
*
 
O
®
®
O
O
O
 Whilst Booting: Decompressing backup software image (SIM Flashes quickly for about 2 seconds)
*
 
O
O
®
O
O
O
 Whilst Booting: Continuous flash – no software image present on unit
*
 
O
®
O
O
O
O
 Whilst Booting: Sarian in Boot Loader Mode
*
*
 
 
 
 
 
 
 LAN Connection Link active
*
®
 
 
 
 
 
 
 LAN Connection Link active and data being transmitted/received
*
 
 
 
 
*
 
 
 Serial Connection has made a valid connection
*
 
 
 
 
 ®
 
 
 Serial Connection sending data over a valid connection
NOTE: This does not indicate data being received/sent by the port, only data as part of a valid layer 3 connection
*
 
O
O
O
 
 
®
 No SIM inserted
*
 
O
O
®
 
 
®
 Sarian attempting to register with GSM NetworkSIM has PIN code set. Network search in progress
*
 
O
*
®
 
 
®
 SIM accepted byGSM Network, attempting to GPRS attachment
SIM may not be GPRS enabled
Insufficient signal strength on GPRS network
*
 
®
*
®
 
 
 
 GPRS Attachment complete, attempting to make GPRS connection
Incorrect APN specified
Incorrect User id or Password
NOTE: NET will come on and off periodically
*
 
*
*
 
 
 
¥
 Active GPRS connection
*
 
*
*
®
 
 
¥®
 Active GPRS connection sending/receiving data NOTE: GSM Light will flicker with the data transfer as well as showing the normal double-flash

GSM/GPRS Module
During the setup of GPRS connections the Sarian will attempt to make a connection to the specified APN a number of times before it will assume that there is a problem with the GSM/GPRS module.

By default, after 10 unsuccessful attempts to bring up a PPP link to the specified APN the GSM/GPRS module will be rebooted, note that only this module and not the Sarian unit is power-cycled.

In addition to this the Sarian will check the status of the GSM/GPRS module every 10 seconds to gather information about signal strength, attachment status etc. In the event that the module cannot be contacted 30 consecutive times it will be rebooted.

In each event the process of SIM registration and GPRS attachment will be retried which will be shown by the LEDs as normal

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