This action is recommended because it allows you to test and verify the transmit and receive ports. To create a physical loopback cable can help to diagnose a suspected hardware problem. When selecting a suitable fiber loopback for the transceiver, we should consider the connector type, polish type, and cable type. Fiber optic loopback testing is the easiest way to ensure that the transceiver works faultlessly. Then we can compare the transmitted pattern with the received pattern to troubleshoot a defective node in the network. Thus, during the testing process, the loopback cable directly routes the laser signal from the transmitter port back to the receiver port. When performing the loopback test, the fiber loopback cable can be directly plugged into the output and input port of transceiver module respectively (the ports at the ends of the connection must be compatible). The former one is to send out laser signals and the latter is to receive signals. As we all know, transceiver module has two ports, a transmitter port and a receiver port. There are loopback plugs for many different ports, including serial ports, Ethernet ports, and WAN connections.įiber loopback cable is often utilized to check whether the transceiver module is working perfectly as designed. In a word, it is a connection device that is plugged into a port to perform a loopback test. It provides system test engineers a simple but effective way of testing the transmission capability and receiver sensitivity of network equipment. The lookback cables can provide a simple and effective means of testing the capabilities of the network equipment, and they are typically used for fiber optic testing applications or network restorations.Ī loopback cable is also known as loopback plug or loopback adapter, which is a plug used to test physical ports to identify network issue. Do you know the loopback cable can be acted as a test tool in the telecommunication? Absolutely, the loopback signal is used for diagnosing the networking problem. In Primary DNS suffix of this computer, you must see the domain name, for example, us. testing applications, there are many tools for this function, such as visual faults locator, optical power meter, OTDR, etc. Using the previous example, the host name must be sales and the domain must be us.Ĭlick More. In Computer name, you must see the host name, and in Full computer name, you must see the host name and domain name. Open System in the Control Panel, and verify that Full computer name displays the host name and the domain name, for example, .Ĭlick Change. IP_address is the non-routable IP address.įor example: 10.10.10.10. mycomputer Record the values you entered, which you need later in this procedure.Īdd a line to the DRIVE_LETTER : \WINDOWS\system32\drivers\etc\hosts file with the following format, after the localhost line: Oracle recommends the following non-routable addresses:ġ92.168. IP Address: Enter a non-routable IP for the loopback adapter. In the Properties dialog box, click Use the following IP address and do the following: On the General tab, select Internet Protocol (TCP/IP), and click Properties. This is usually named "Local Area Connection 2". Right-click the connection that was just created. This displays the Network Connections Control Panel item. In the Completing the Add Hardware Wizard window, click Finish.Ĭlick Manage Network Connections. In the The wizard is ready to install your hardware window, click Next. Network Adapter: Select Microsoft Loopback Adapter for Microsoft Windows 7 and Microsoft KM-TEST Loopback Adapter for Microsoft Windows Server 8.1 and later releases. In the Select Network Adapter window, make the following selections: In the The wizard can help you install other hardware window, select Install the hardware that I manually select from a list, and click Next.įrom the list of hardware types, select the type of hardware you are installing, select Network adapters, and click Next. Click hdwwiz to start the Add Hardware wizard.įor Microsoft Windows 8.1 and later releases, open the Windows Control Panel and double-click Add Hardware to start the Add Hardware wizard. To install a Loopback Adapter on Microsoft Windows 7 or to install Microsoft KM-Test Loopback Adapter on Microsoft Windows 8.1, Microsoft Windows Server 2012, Microsoft Windows Server 2012 R2, and Microsoft Windows Server 2016 perform the following steps:Ĭlick Start and enter hdwwiz in the Search box. The Microsoft Loopback Adapter in Microsoft Windows 7 is renamed to Microsoft KM-TEST Loopback Adapter in Microsoft Windows 8.1 and later releases.
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