OWB-SQLSERVER connectivity - critical

Guys,
I have few doubts... Please clarify.
The details are -
Scenarion 1:
OWB server & Oracle serever - machine 1 (windows)
Sql server - machine 2 (windows)
I am able create a DB link thru OWB.... I can import SQL tables into OWB.
This is working fine.
Scenario 2:
1) Sqlserver is on windows (always)
2) Our Oracle is on Unix
3) Our OWB is on Unix.
Questions:
a) I am not sure how easy it is to add odbc to OWB in Unix. Is it available in the original installation distribution media on Unix?
b) Don't we need a listener running on each Sqlserver database server, so sqlnet knows to talk to other environments (sqlserver)?
c) In OWB if we want create one source module for other database, ODBC driver is required?? In unix we cannot find any ODBC driver by default.
Separately we need to insatll it.
From what I have read, it seems for Oracle to talk to Windows sqlserver, that a listener needs to be running on windows, which means that Oracle sqlnet client tools is not enough. (We have 10.2 installed on a few machines, but I don't see that you can start a listener, so I expect we will need to
install and support running Oracle server software no database), on the same server that is running sqlserver.
Please clarify the above questions.
Also i am planing to set up a connection between Oracle - SQL thru OWB. Please find the below steps and let me know if am wrong -
1) Sqlserver is on windows (always)
2) Our Oracle is on Unix
3) Our OWB is on Unix.
a. Create a DSN in windows where Sql serevr installed.
b. Modify initSID.ora file(HS folder) in Unix.
c. Modify listener.ora file in Unix where oracle installed
d. Modify tns.ora.
Now in the above steps i have few doubts...
1) How the listener will pick the DSN of windows... Do we need to specify host to sql server ip (machine)???
2) For this any ODBC is required in Unix??
3) Do we need to install listener in windows where sqlserver installed & point host name of tns.ora(unix) to this ip(sql server).
clarify the above steps...
Thanks in advance.
Harsha

Hey thanks man...
It helped a lot....
But u know one thing i followed the same method in windows...
Details are:
machine1: Oracle & OWB (on windows)
machine2: SQL server ( on windows)
I am creating source module in OWB for non oracle database and giving host name as machine2 ip.
here the tns name on machine 1 is no need to change and i am directly connecting to machin2 and able to import SQL tables..
So here my question is how it is able to connect to machine 2 without changing anything in tnsname.ora file on machine1.
So can i follow this method in unix, like no need to touch anything in UNIX not even tns file.
Thanks
Harsha

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OWB-SQLSERVER connectivity - critical

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