Loopback Testers

The Gigabit SuperLooper quickly and easily checks the RX/TX pairs of 1000base network cables, helping a network technician determine if a network signal exists or if there are broken or shorted wires within the cabling (See Specifications). It can be plugged directly into an Ethernet wall port or can be attached to the end of a network patch cable. ...more

The SuperLooper™ T1/E1 Loopback Jack and Plug quickly and easily checks the RX/TX pairs of T1/E1 circuit cables helping a network technician determine if a signal exists or if there are broken or shorted wires within the cabling. It can be plugged directly into a T1/E1 CSU/DSU or can be attached to the end of a network patch cable. ...more

The SuperLooper™ ISDN (BRI) Loopback Jack and Plug is used to check ISDN (BRI) cabling for broken or shorted wires and network interfaces for the simplest functionality. When installing primary network backbone circuits, the simple check of an ISDN (BRI) interface or jumper cable using the SuperLooper™ ISDN (BRI) Loopback Jack and Plug can save hou ...more

Creates Handshaking for DB25 or DB9 Serial Ports. This handy loopback tester comes complete with DB9 and DB25 female connectors to interface with any PC serial port. Useful for diagnosing problems with serial interfaces. ...more

The StarTech.com Advanced RJ45 LAN Cable tester allows a single person to test several long cables faster and more efficiently than ever before. The tester uses remote loop-back plugs that each have their own unique ID number that the tester can identify. If several cables need to be tested, the user simply puts a loop-back plug on the end of ...more

Emulates a Parallel Device for Your Testing Needs, DB25 Male Connector. This handy loopback tester is equipped with a DB25 male connector to interface with any PC parallel port. ...more

The StarTech.com Professional LAN Installation Tool kit provides all the necessary tools to install and test RJ45 networks in a compact, handy, carrying case. Tools included are: a RJ45/11 Crimp tool, a 110/66 Impact Punch Tool, a wire stripper, several RJ45 connectors, and a RJ45 network cable tester with remote loopback plug (same as the StarTech ...more

This slimline loopback testers can help diagnose problems with serial interfaces. ...more

Your first line diagnostic tool, developed for the most thorough diagnosis of PC hardware problems. With more than 300 total diagnostic tests, PC-Doctor Service Center 6 is the most complete and accurate hardware diagnostic product on the market. PC-Doctor Service Center 6 supports Microsoft Vista natively. More than 300 current, up-to-date diagnos ...more

This slimline loopback testers can help diagnose problems with parallel interfaces. ...more

Fiber Loopback Tester provides you with a looped signal from the source device to hardware for testing purposes. It allows you to easily test the Fiber connections for both transmitting and receiving functions. ...more

The Startech.com Fiber Loopback Tester provides you with a looped signal from the source device to hardware for testing purposes. It allows you to easily test the Fiber connections for both transmitting and receiving functions. ...more

Fiber Loopback Tester provides you with a looped signal from the source device to hardware for testing purposes. It allows you to easily test the Fiber connections for both transmitting and receiving functions. ...more

This Serial Loop Back Tester allows you to diagnose any problems with your DB25 port or DB25 serial cable. It has diagnostic LEDs for TD / RD, RTS / CTS, DSR/DTR, and TC/RC connections. ...more

This premium loopback tester support speed of up to 3.2GHz and certified to pass the eye-pattern test. ...more

Electrodata's T1-LITETM provides all the basic T1 testing functions in a small package and at a great price. The T1-LITE is designed with full T1 transmit and receive functions perfect for turning up and troubleshooting T1 lines and equipment. Built to the same exacting standards of other Electrodata products, the T1-LITE is designed to autoco ...more

This premium loopback tester support speed of up to 3.2GHz and certified to pass the eye-pattern test. (Connector: HSSDC 8Pin Male). ...more

Provides a looped signal from source for testing. Fiber Loopback Cables from Cables To Go provide you with a looped signal from the source device to hardware for testing purposes. This allows for a signal check for both the transmit and receiving functions. ...more

Provides a looped signal from source for testing. Fiber Loopback Cables from Cables To Go provide you with a looped signal from the source device to hardware for testing purposes. This allows for a signal check for both the transmit and receiving functions. ...more

Provides a looped signal from source for testing. Fiber Loopback Cables from Cables To Go provide you with a looped signal from the source device to hardware for testing purposes. This allows for a signal check for both the transmit and receiving functions. ...more

Provides a looped signal from source for testing. Fiber Loopback Cables from Cables To Go provide you with a looped signal from the source device to hardware for testing purposes. This allows for a signal check for both the transmit and receiving functions. ...more

Fiber Loopback Cables from Cables To Go provide you with a looped signal from the source device to hardware for testing purposes. This allows for a signal check for both the transmit and receiving functions. ...more