Cradlepoint CBA750 Series User Manual page 40

CBA750| USER MANUAL Firmware ver. 1.9.0
CRADLEPOINT
Global Reset Settings
5.3.2
This section allows you to change the reset
settings for any modem plugged into the router.
Aggressive Modem Reset. (Default: Selected.)
Some modems tend to become unresponsive or
unable to maintain a connection for a long period
of time. This setting uses more aggressive
techniques to get the modem to reset and
reconnect. When enabled, a hard reset will occur
on the appropriate USB/ExpressCard port in the following cases:
1. Single Mode (3G or 4G) modem is unplugged / removed.
2. USB modem has an error.
3. Modem loses communication as per Verify Connection method (below).
4. Connection attempts fail.
Verify Connection. (Default: Disconnected.) This setting causes the router to periodically verify that the modem
connection to the Internet is still active. Due to the nature of cellular networks, there are times the modem will report it is
still active but data will not be able to flow across the connection. This setting enables the router to detect this condition
(either actively or passively) and restart the connection if there is a problem.
Idle Timeout. (Default: 60 seconds.) This is how often the router will check to see if the modem connection is still
active. It does this by seeing if any new data was received over the connection during the period of time you set.
If any data was received since the last check, the timeout is restarted. If no data is received during this time period
and the Verification Mode IS:
 Passive DNS. The router will take no action until data is detected that is destined for the WAN. When this
data is detected, the data will be sent and the router will check for received data for 2 seconds. If no data is
received, a DNS request will be sent to the DNS servers. This DNS request will be retried 4 times at 5-
second intervals. (The first 2 requests will be directed at the Primary DNS server and the second 2 requests
will be directed at the Secondary DNS server.) If still no data is received, the modem will be disconnected
and failover will occur.
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