Found this good explanation for the various timeouts in WCF and which ones get used on the client and which get used on server.
Brief summary of binding timeout knobs...
- SendTimeout is used to initialize the OperationTimeout, which governs the whole interaction for sending a message (including receiving a reply message in a request-reply case). This timeout also applies when sending reply messages from a CallbackContract method.
- OpenTimeout and CloseTimeout are used when opening and closing channels (when no explicit timeout value is passed).
- ReceiveTimeout is not used.
- Send, Open, and Close Timeout same as on client (for Callbacks).
- ReceiveTimeout is used by ServiceFramework layer to initialize the session-idle timeout.