Modem Fails to Disconnect After Selecting Hang Up in RASPHONE
--------------------------------------------------------------------------------
The information in this article applies to:
Microsoft Windows NT operating system version 3.1
Microsoft Windows NT Advanced Server version 3.1
Microsoft Windows NT Workstation versions 3.5, 4.0
Microsoft Windows NT Server versions 3.5, 4.0
--------------------------------------------------------------------------------
Summary
Your modem may fail to disconnect from a remote modem when you choose
the Hang Up button in Windows NT Remote Access (RASPHONE.EXE). RASPHONE
acts as if the connection is broken, however, your modem is still
connected to the remote modem. When you select the Hang Up button
in RASPHONE, Remote Access Service (RAS) drops Data Terminal Ready
(DTR) to force the modem to disconnect from the remote modem.
More Information
If your modem is not disconnecting from the remote modem after you
select the Hang Up button in RASPHONE:
Check your modem cable if your are using an external modem.
Verify that your RS-232 modem cable includes a DTR pin.
Many 9-to-25 pin converters do not carry modem signals (including
DTR).
Try using a different cable that you know is working correctly with
RAS.
See the RAS help file (RASPHONE.HLP) for additional information
on cable requirements for RAS.
Verify that RAS is setting your modem to use normal DTR operations.
Most modems use the &D2 command to set the modem for normal
DTR operations. To determine if normal DTR operations are being
set properly for your modem, check the COMMAND_INIT string in it's
corresponding section of the Windows NT MODEM.INF file. See the
RAS help file for additional information on viewing and modifying
the MODEM.INF file.
Confirm that your modem is not configured to ignore DTR. Some modems
include a dip switch or jumper that allows you to configure the
modem to ignore DTR. Check your modem documentation for information
on how to configure your modem to use normal DTR operations or ignore
DTR.
Add the following setting to the COMMAND_INIT string for your modem
in the MODEM.INF file:
S25=3.
S25 controls the duration of time (in hundredths of a second) that
DTR must be dropped before the modem disconnects itself from the
remote modem. Setting this value to 3 will ensure that the modem
disconnects almost immediately after choosing the Hang Up button
in RASPHONE
|
