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SUMMARYThe information in this article explains the algorithm used by remote access service (RAS) when you select use another port if busy under Dialup Networking, and how this can cause connectivity problems with multiport serial adapters. MORE INFORMATION
If you are using a multiport serial adapter to provide connectivity for numerous modems, the modems must be homogeneous if you want "use another port if busy" to work. The reason for this is that the list of ports is maintained in the order that TAPI enumerates them to RAS. The order is arbitrary, and Unimodem is not capable of assigning a particular order. TAPI is a neutral layer between the TSP (Unimodem) and the application (RAS), and enforces no rules about ordering on either side.
For RASTo disable the automatic dialing of another port if the current port is busy, go to the Basic tab of the phonebook entry and click to clear Use another port if busy. This will prevent the RAS server from attempting to use another port if the device it is configured to use is busy.For RRASTo disable the automatic dialing of another port if the current port is busy on a RRAS router, you need to edit %Windir%\System32\Router.pbk:
Router.pbk is arranged as an .ini file with the name of demand dial interfaces as sections. Go to the section corresponding to the demand dial interface for which you want to change this behavior. Change the OtherPortOk field in this section to 0, instead of 1.
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Keywords : ntras |
Last Reviewed: March 31, 1999 © 2000 Microsoft Corporation. All rights reserved. Terms of Use. |