NLS_LANG setting for a client with multiple Oracle servers

Hello!
We have a web application which has to connect to one of the Oracle servers with different charactersets. When the NLS_LANG on the client is a single byte encoding and the server has a single byte encoding there are no problems. We have now a server with NLS_CHARACTERSET UTF8 and all special (hungarian accented) character are replaced.
When we set the client to UTF8 the rest of servers does not work.
What is the solution for one client and multiple servers with different encoding?
Is there a special key in connection string?
I tried to change the nls_lang with an alter session statement but without success.
Regards,
emeriqus

NLS_LANG is not depending on the database side, it's a CLIENT setting to "let Oracle know what encoding is used on the CLIENT" so that Oracle can do the conversion from the client encoding to the database (NLS_CHARACTERSET) encoding.
for ONE application/client the is only ONE correct NLS_LANG value, regardless of the database NLS_CHARACTERSET
If you web application is really an UTF8 application (check with your vendor) then you can perfectly use a UTF8 client setting and a 8 bit database
Of course, you will be limited to the database side in this case seen the 8 bit characterset does not know all the characters in UTF8
The fact that setting the NLS_LANG to UTF8 "does not work" with your web application is simply the fact your application is not a UTF8 env.
Setting nls_lang to UTF8 will not "magically" make your application UTF8, NLS_LANG is depending on the encoding used in the web server.
But the first thing to ask yourself is if CURRENT data is correctly in the Oracle database.
use SQLdeveloper to check the data, this is a "know good client" that needs no NLS configuration.
You can download it from http://www.oracle.com/technology/products/database/sql_developer/
If the data is displayed correctly in SQLdeveloper then you are sure it's correct in the database.
If data is WRONG in the database then that needs to be corrected first, "trying" different client side configurations will only make matter worse (even if they make the data "look good" )
Regards,
Gunther
Client side notes on mentalink:
Note:158577.1> NLS_LANG Explained (How does Client-Server Character Conversion Work?)
1.2 What is this NLS_LANG thing anyway?
3.2 A detailed example of a wrong nls setup to understand what's going on.
4.2 How can I Check the Client's NLS_LANG Setting?
5.1 My windows sqlplus is not showing all my extended characters.
Note:179133.1> The correct NLS_LANG in a Windows Environment
Note:264157.1> The correct NLS_LANG setting in Unix Environments
Note:229786.1> NLS_LANG and webservers explained.
Note 115001.1> NLS_LANG Client Settings and JDBC Drivers
When using Unicode start here:
Note:788156.1> AL32UTF8 / UTF8 (Unicode) Database Character Set Implications
Setting NLs parameters: <Note:241047.1> The Priority of NLS Parameters Explained.

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From: Jorge Espinoza [SMTP:[email protected]]
Sent: Wednesday, May 12, 1999 1:18 PM
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Subject: Deployment for 250 Clients with a poor communication
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