How Modem Sharing Client Queries for Devices on SBS

• Microsoft BackOffice Small Business Server version 4.0

SUMMARY

This article describes how the modem sharing client queries for devices on the server side of a Small Business Server (SBS).

MORE INFORMATION

When querying local COM ports, the status of the port is returned instantaneously. Because the SBS modem sharing client redirects COM port communications to the SBS server where the real modem exists, querying the status of a remote port may take longer. It requires sending a status request to the server and then waiting for a reply from the server. The operation is completed when the server replies with the required data.

The modem sharing device driver requires that all status queries to be synchronous. That is, the modem sharing device driver must wait for the reply from the server before returning to the caller. If the reply from the server takes too long, the application request may timeout.

Additional query words: smallbiz sbs client side buffering modem pooling

Keywords : SBS
Version : winnt:4.0
Platform : winnt
Issue type : kbinfo