Digi TransPort WR31 User Manual page 200

Configure network interfaces
Post Hang-up string:
Additional AT commands that are sent to the wireless module after it has been disconnected. As
with the Initialisation strings, it is not necessary to include the AT as this is inserted
automatically by the router.
Wait n seconds between hanging up and allowing another call
The length of time, in seconds, that the router will wait after hanging-up the wireless module
before initiating another call attempt.
Wait n seconds between attachment attempts
The number of seconds between network attachment attempts, some networks require 60
seconds between attempts to attach to the wireless network.
Reset the module after n unsuccessful connection attempts
The router will normally make multiple attempts to connect to the wireless network in the event
that the signal is lost. In some cases, this can result in a lock-up situation where the wireless
network is unable to attach the wireless device due to the multiple attempts. This parameter
specifies the number of attempts at connection that the router should make before power
cycling the internal wireless module. Power cycling the wireless module forces it to re-register
and reattach to the network. The default setting of 10 is the recommended value. Setting this
parameter to 0 prevents the router from power-cycling the wireless module if it cannot obtain
an IP address.
Reset the module after n unsuccessful status retrieval attempts
The router periodically collects status information from the internal wireless module. This
information, which may be viewed on the Management > Network Status > Interfaces >
Mobile web page, includes details of the signal strength and network attachment status. As a
safeguard against problems communicating with the wireless module, you can use the status
retries parameter to specify the number of unsuccessful attempts to retrieve status information
from the wireless module before power cycling it. The default setting of 30 is the recommended
value. Setting this parameter to 0 prevents the router from power-cycling the wireless module if
it cannot read the wireless status information.
Create a signal strength event every n minutes
Configures the router to write the signal strength to the Event Log every n minutes.
If registration is lost for 5 minutes
Controls whether the router will power cycle the wireless module after the network registration
has been lost for 5 minutes. Setting this parameter to Do not reset the module will never
recycle the wireless module, setting to reset the module if GSM registration is lost will power
cycle the module after 5 minutes loss of GSM registration, and setting to reset the module if
GSM registration is lost will power cycle the module after 5 minutes loss of GPRS, 3G or HSPA
registration.
Digi TransPort WR Routers User Guide
Configure mobile (cellular) interfaces
200