Answer: In AT+KCNXTIMER=[,[,[,]]]],
is linked to PDP context activating, together with the ;
is linked to the connection to the remote server.
If you set as 1, it means no retry if PDP activation failed. And then will be useless.
If you set as 2, it means one more retry if PDP activation failed. The retry will happen after in seconds.
If you set as 0, it means internal timer will be used when to connect the remote IP/Port. The internal timer is 75 seconds. So if you set as 0, it will be the same result as you set as 75.