When you have logged problems on OSS, you may occasionally be requested to open the connection for SAP to logon to our system to checkout the problem. The connection needs to be left open for a few days to allow them to check the problem out. It may be that someone in Germany will be logging in at night.
This can either be done via service.sap.com or the "old" way:
Logon to the system, transaction oss1, use your "S"id and password. You should see your inbox for customer messages.
Click on the "service" button. Then lick on "service connection".
Double click on the service (DEV, TEST, or PRD) that you wish to open. Enter the time at which the connection is closed (click on the "pencil" to enter change mode if necessary).
If you have a ISDN dial-on-demand link to SAP, note that you will be paying
ISDN rates (something like 2c (aud) per min) while the connection is open.. We call to SAP and while this link is up we pay the call costs. The link
may have an idle timeout to keep the costs down. When you "Open" the SAP Router, this initiates the link, but if there is no traffic the link will close after
timeout is reached.
Apparently the SAP systems normally send a "ping" to keep the link open until their staff can look at it.