Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Our Windows based application dials out to multiple devices using RS-232 connections over RAS with a null modem connection.

These connections are created by calling RasSetEntryProperties with a dwType of RASET_Phone on Vista or 7 and RASET_Direct on previous versions of windows.

From our investigations Vista and Windows 7 can only maintain 5 concurrent RAS connections before dropping older connections when dialed and 9 on Windows XP and 2000.

Are these hard limits in Windows or could this be pointing to other issues in how we communicate of the sockets to these remote devices?

share|improve this question

You must log in to answer this question.

Browse other questions tagged .