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Applies To: Windows 2003 Server or newer ONLY
Note: Not all serial devices can be redirected. The following devices do not work.
On the Client Machine
In the Client's “Remote Desktop Connection” select Options > Local Resources then check the [Serial Ports] option.
On the Terminal Server Machine
Open Group Policy (to open the Group Policy Editor, go to run and type: gpedit.msc, In Computer Configuration, Administrative Templates, Windows Components, Terminal Services, Client/Server data redirection, double-click on Do not allow COM port redirection, and then click Disabled (to enable redirection).
Is there a way to check if my local COM ports are being redirected?
You can use the CHANGE PORT /QUERY command. Simply start a command prompt window and type the following command:
change port /query
You should see a similar output to the following:
AUX = \DosDevices\COM1
COM1 = \Device\RdpDrPort\;COM1:2\tsclient\COM1
COM2 = \Device\RdpDrPort\;COM2:2\tsclient\COM2
COM3 = \Device\RdpDrPort\;COM3:2\tsclient\COM3
LPT1 = \Device\RdpDrPort\;LPT1:2\tsclient\LPT1
PRN = \DosDevices\LPT1
As seen above all COM ports (1 to 3) are being redirected from session 2 (:2 after the COM port).
If the ports were not being redirected your output would be similar to this:
COM1 = \Device\Serial0
COM2 = \Device\Serial1
Ensure your a not running your PINPAD over wireless. We support Terminal Services via wireless, because there is no data being transmitted, just screen and keyboard, however PINPADs transmit data. Wireless networks will drop or delay data much more often than wired networks.