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A hard loopback test in telco speak is a simple device that connects the transmit tip side of a circuit to the receive tip side, and the transmit ring side to the receive ring side to complete a loop where the circuit is actually sending and receiving to itself. The device is usually an RJ45x plug that a tech will modify and place into a D-mark jack. By doing this, say in a T-1 circuit, you end up with a monitoring situation where the remote end tester can send and receive patterns to check whether a circuit is taking any errors. This can also be achieved by sending a loop pattern to a piece of equipment causing it to go into a loop for testing. But the hard loop is a physical piece placed into the circuit usually where the customer plugs his equipment. Mike Q Special Equipt Installer --GTE/Verizon 30 years
What else can I help you with?
Why is the DO loop called a pre-test loop?
No reason. It is a post-test loop.
a for loop is a post test loop?
pre-test
Adapter used to test the basic functionality of computer ports?
Loop-Back
What adapter is used to test the basic functionality of computer ports?
Loop-Back
What tools can you use to test a usb port on your computer?
A loop back plug.
Is a while loop a pre-condition or post condition?
The while loop is a pre-condition loop. It tests the condition at the beginning of each loop, executes the loop if it is true, and goes back to the test after executing each iteration.
USB port is faulty what tool can you used to test the port?
Loop-Back Plug
What keyword is used to jump out of a loop without waiting to get back to the conditional test?
break
What is the significance of test condition in a loop?
The test condition in a loop is what's used to determine when the loop should end.
If you suspect that a USB port is faulty what tool you use to test the port?
A Loop-back plug.
Which loop specifically designed to initialize test and increment a counter?
A for loop.
What the difference between pretest loop and posttest loops?
The difference is that pre means before and post means after in Latin so it's tested before or after. :)
