CheckLink Method
Will check the connection to the server.
Syntax
int CheckLink();
Remarks
This method will check the connection to the server. This method is used to ensure that the host on the other end of the connection is still active, or that it is still available. While a socket connection may still be available between the client and server, the SMS application on the server may have been taken offline without releasing the socket, or the CPU may be bogged down, etc. This method will send a PDU to the server and wait the length of Timeout for a response.