Hi there,
I'm having an issue that I could really use some help with - I've been searching the internet for days with no clear answer.
Here is the scenario:
I am trying to use a signature capture pin pad for my point of sale software. The pin pad driver creates a virtual COM port. When communicating with the local computer directly, it works absolutely fine - communication is very quick. When I do an RDP session to a local server and share the COM port, there is also no problem - communication is very quick. However, once I try to reach a remote server and share the COM port, the communication is terribly slow and more often than not, the POS software ends up timing out. I have tried using an RDP session to the remote server over the WAN IP address of the server and using a VPN connection to it's local IP address, but both produce the same slow results.
I'm using a Windows 7 (also tested with Windows XP) client connecting to Server 2008 R2 Server with remote desktop services. I made sure that all windows updates are installed to latest version. I also checked with the hardware manufacturer of the pin pad and I have the latest device drivers. I also tried using a different serial pin pad (not using virtual com port drivers) but had the same result, so I don't believe it's a driver issue.
I've seen that slow COM port redirection seems to be a fairly common issue, but I don't see any clear resolutions. Any help you can provide would be great! Thanks!