User manual
CRADLEPOINT CBA750| USER MANUAL Firmware ver. 1.6.9
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5.2 Failover
The CBA750 can establish an uplink via any modems plugged into
the USB or ExpressCard ports. Although all of these devices may
be plugged in, only one of them may establish a link at a time. If
the WAN connection fails the router will automatically attempt to
bring up a new link on another device. This feature is called
failover. You can also manually disconnect and re-connect specific
ports using icons in the Control column. The priority table can be
saved permanently via the Save button. Priority changes take
effect immediately even if they are not saved.
5.2.1 WAN Interfaces
This section allows you to:
Change the failover order of devices (aka interfaces)
Monitor their status
Take the active link down
Bring a link up on another device
The device at the top of the list has the highest priority. This is the device which the router will attempt to start when it boots up. If the link cannot
be brought up on this device, or if it fails after boot up, the router will attempt to bring the link up on the next available device. Whenever a link fails
on a device, the router will always move down to the next device down in the list, and wrap around again to the top.
Slot. The slot is the physical port the modem is plugged into.
Device. This shows a description of the device.
Status. This is the link status of a device, which is one of the following:
Ready. This means the device is plugged in an available but not active.
Establishing. This means the router is attempting to bring up the link over the device.
Signal Strength Mode (Established). This means the link is up and running on the device and the signal strength is shown.
Suspended. This means the router will not attempt to bring up the link over the device until a timer expires. This only applies to
modems, which must conform to carrier specifications about how often they may attempt to connect to the network. The timeout
depends on how many previous connection attempts have failed in a row. (continued)