Purpose

The purpose of this document is to provide information on the PC-Doctor Network Loopback Adapter.

Description

The network loopback adapter is designed to loop incoming data back to the network port and can be used to run the Network External Loopback Test in Service Center for Windows and Bootable Diagnostics. To use the loopback adapter, attach it directly to the systems NIC (Network Interface Card). The adapter can be seen below:

Additional Information

The Network Loopback Adapter does not support Gigabit communication, and will require the network adapter to be configured for 10/100 Megabit speed. 

The network adapter must be set to 10 Mbps or 100 Mbps in order to receive accurate results for the Network External Loopback Test in Service Center for Windows.
1. Open the Windows Control Panel.
2. Select Network Connections:
   a) In Windows XP, click Network Connections.
   b) In Windows Vista or Windows 7, access the Start menu, and use the search box to find Network Connections.
   c) In the Windows 8, 8.1, or 10 Modern UI move the mouse to the right hand side of the UI, click the Search Icon, Select the Settings Tile, and use the search box to find Network Connections.
3. Right-click the connection and click Properties.
4. Click the Configure... button.
5. On the Advanced tab, change the value of the Speed & Duplex property to 10 or 100 Mbps with Half or Full Duplex.
6. Click the OK button and then run the test.