56
Figure 3-4
Connection Detection mechanism: If the device is in dial-up connection
status, the system will detect the network connection once every 30s
(Ping the specified IP address twice). If the two network detection
failed(Ping for four times in total), the connection will be detected
abnormal and then the system will disconnect the current connection and
dial up again.
To enableConnection Detection also brings about two drawbacks: 1. It
will bring about additional traffic; 2. Its detection may be incorrect via
the ping packet way to detect network connection in the presence of
multiple networks.
3.1.3 Make new connection
Make new connection,as shown below;
