How to know which process has a serial port open?

[Ignacio Machin \( .NET/ C# MVP \)]

Hi,

I'm trying to install a modem in COM1 under XP Pro, but when I try to query
the modem it says that the COM1 port is being used by another process, I
checked and I see no process that should be using the modem, is there any
utility that I can use for this ,I was thinking one like Process Explorer or
TCPView from sysinternals.


Cheers,

 

[Mike Hall \(MS-MVP\)]

Ignacio

Generally, analogue modems default to COM 3.. during the installation
process, allow it to do this..

 

[Ignacio Machin \( .NET/ C# MVP \)]

Hi,

This is an external modem, an old US Robotic 14.4kbs, the machine (dell )
has only one serial port


cheers,

 

[Mike Hall \(MS-MVP\)]

Ignacio

That is one old modem.. you surely are not going to try to surf the www with
it.. you might want to check in BIOS that the serial port is enabled.. it is
possible that XP might report it in use if it is disabled..

Maybe somebody else could interject with some possibilities..

--
Mike Hall
MVP - Windows Shell/user

 

[Ignacio Machin \( .NET/ C# MVP \)]

Hi,

I'm planning surfing with that
It's only intended to receive incoming data calls, those calls comes from a
PocketPC/Cellular phone, so the speed is fine

I will check the bios, thanks for your hints

cheers,

 

[Si Ballenger]

Hi,

I'm trying to install a modem in COM1 under XP Pro, but when I try to query
the modem it says that the COM1 port is being used by another process, I
checked and I see no process that should be using the modem, is there any
utility that I can use for this ,I was thinking one like Process Explorer or
TCPView from sysinternals.

PDAs and other gizmos often install "hotsync" and such which will
grab the port on boot. You might go into device manager and
disable the port, then let windows find it again and see if what
happens. XP may also think you have a serial mouse connected.