Did you just find a file that has a digital signature from Fiberlink Communications? If that's the case, please read on.
You will typically see Fiberlink Communications when clicking to run the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view the digital signature details for Fiberlink Communications with the following procedure:
Here's a screengrab of a file that has been signed by Fiberlink Communications:

As you can see in the screenshot above, Windows reports that "This digital signature is OK". This means that the file has been published by Fiberlink Communications and that no one has tampered with the file.
If you click the View Certificate button shown in the screencap above, you can examine all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, etc. You can also see the address for Fiberlink Communications, such as the street name, city and country.
VeriSign Class 3 Code Signing 2009-2 CA has issued the Fiberlink Communications certificates. You can also see the details of the issuer by clicking the View Certificate button shown in the screenshot above.
These are the Fiberlink Communications files I've gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/44 | impl_firewalllib.dll |
The detection percentage is based on that I've collected 44 scan reports for the Fiberlink Communications files. 0 of these scan results came up with some sort of detection. If you like, you can view the full details of the scan results by examining the files listed above.
The analysis is based on certificates with the following serial numbers: