1 Reply Latest reply: Dec 16, 2009 9:07 PM by Tim Reiter RSS
  • Re: What is a modem reset timer?
    Novice

    I believe you are referring to a device application that will reset the modem in the event that it's not able to establish a network connection. There are guidelines for "aggressive behavior", where carriers don't want the device to retry every minute for eternity, because it's wasting network resources. The proper approach is to have a back-off timer as described in the following design guideline:

    It is acceptable for an application to reboot the modem in case of GSM registration failure or in case of GPRS Attach failure due to transient reasons or due to no network available, but no more frequently than once every 5 minutes, and no more than 4 times in succession.  Additional reboots may occur at 30 minutes, 60 minutes, then every 60 minutes; i.e. @ 1(initial attempt), 5, 10, 15, 20, 30, 60, 120, 180, …

     

    Some carriers require this guideline in order to pass device certification.

    -Tim R