Ok, I’ve understood 
…in connectors, of some of my web service consumer, I could see where the soapClient operation is called and then, its timeout input parameter. Thank you for that.
But, in my case, I have another question (or two 8) ) :
I have a simple service flow that call a Jdbc Adapter Service (with no consumer and no connector) and I’ve created a WSD to add this operation.
In that case, where would you configure the Timeout (in case of a very bad Sql not opimized query 
) ?
Last question :
for the timeout soapClient, what is the default value, and where is it configured on the IS please ?
Regards