Communicating with modem-please give some suggestions

Hi Every one....
We r having a real time system now and we r looking for a better idea for the same.
The real time system is developed using VB and now thinking of changing to labview.
The current system is ......Data from RTU is sent to serial device(modem) and VB application checks the modem
every 10 second and any new data found it inserts into relevant tables in the database and after insertion to the
database the data is fetched from the database for real time display.So in the real time dipay is getting delayed.
ie, a record that is newly obtained is displayed in the real time display after several minutes only.
Think the display is delayed because of the fact that its getting displayed after inserting the data into the database
and then reading the data from the database.
What is the better idea to reduce the delay in display?I thought if v check the modem every 10 second and if new data got,fetch the data ,decode it ,display the information and then insert into the database,the system will be better.But if a single check of modem can give any number of messages which contain data.If v get 10 messages v have to decode 10 messages display 10 records and then insert 10 records into the database.Is there any better way for this?
I havent worked with serial communication applications.I havent thought abt the coding side now.Just thinking of theoverall idea only.
Thanks in advance for the suggestions.

Hi,
Thank you so much for your reply sir.
Actually my question is related to modem communication .But sorry, in the first post i asked to know
whether my idea is correct or not.
In Our real time system,RTU send message to modem at any time.
So as in the previous post ,after decoding the data v can display the data ad then can insert into proper table.
And nw i have to also add a module to store the data in a txt file also, sfter fetching the data frm the modem.
ie,as suggested by u i want to check the modem when data arrives at the modem(instead of checking 10second or something)
and i want just to append it to a string until i get one complete message.ie,i have to check for the end delimiter(which is carriage return in our system)and when i get the end delimiter from the modem,i have to write the entire string into the text file.As RTU send the data to modem it may be sending a part of a message or more than one message ....
I want my entire code to be executed only when data arrives at the modem.ie,rather than putting all the code in a while loop i want some other method the code will be executed only when there is data in the serial port.Just like event structure in which certain code is executed only when an event happens(for example code inside a time out event will be executed only when the time out occurs.it is free from loop also).Is it possible to code like that?
I just coded using bytes at serial port and putting the code inside a loop.Now my PC is not connected to modem.so i havent checked my idea is working or not.
I want to code using VISA events.I tried to code.But i think it is not correct..The out put of VISA wait for event's status i am not sure.
I thought if the status is true it indicates the event occured.Can u help me regarding this?
I am herewith attaching my idea.I have put both methods in the same VI.Sorry for the inconvenience because of the bugs in the code.
Thanks once again....
Attachments:
modemread.vi ‏41 KB

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