DOCUMENT:Q142684 08-AUG-2001 [winnt] TITLE :NetworkAddress Parameter Not Supported for a Modem PRODUCT :Microsoft Windows NT PROD/VER:3.51 4.0 OPER/SYS: KEYWORDS:kbenv ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Workstation versions 3.51, 4.0 - Microsoft Windows NT Server versions 3.51, 4.0 ------------------------------------------------------------------------------- SYMPTOMS ======== Assigning a specific media access control address with the parameter HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NdisWAN\Parameters\ NetworkAddress for the modem used for a RAS connection is not supported. Every time a RAS connection is made, the assigned media access control address is set randomly. CAUSE ===== There are two reasons why assigning a specific media access control address is not supported. The first reason is that a modem uses Serial.sys, and serial is not a device that NetworkAddress is relative to. The second reason is that the NetworkAddress registry override parameter is an optional value that is enforced only for Token Ring. So, if Serial.sys supported the NetworkAddress parameter, assigning a specific media access control address could be done. However, this would get more complicated with multiple serial devices in a machine. So, although a modem is a WAN device, it does not use a network device driver, which is where the optional NetworkAddress registry override parameter would be managed. Additional query words: prodnt ====================================================================== Keywords : kbenv Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT351search kbWinNT400search kbWinNTW351search kbWinNTW351 kbWinNTSsearch kbWinNTS400search kbWinNTS400 kbWinNTS351 kbWinNTS351search Version : 3.51 4.0 ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.