Chapter 3. Test Modes

FAR END TESTS

Remote Digital

When the RDL test is initiated at the local DSU 56/64, it commands the remote DSU into loopback with the industry standard V.54 loopback pattern. The loopback point and the signal paths for the remote DSU are the same as the LOOP ONLY test for a local DSU, shown in Figure 3-4 on page 3-6. This Loopback test is performed with data from the terminal or test equipment. The RDL LED flashes during initialization of the test and turns on solid once the test is in progress.

To initiate the RDL test, perform the following steps:

1.Press SELECT five times to turn on the RDL test indicator.

2.Press TEST while this test indicator is on.

3.To terminate this test, press TEST.

RDL with Test Pattern (TP)

When the RDL WITH TP test is initiated at the local DSU 56/64, the local DSU commands the remote DSU into loopback with the industry standard V.54 loopback pattern. The loopback point and the signal paths for the remote DSU are the same as the LOOP ONLY test for a local DSU; see Figure 3-4 on page 3-6. This LOOPBACK test is performed with data from the internal test pattern generator and error detector. The RDL and PTRN LEDs flash during initialization of the test and turn on solid once the test is in progress.

To initiate the RDL WITH TP test, perform the following steps:

1.Press SELECT six times to turn on both the RDL and PTRN test indicators.

2.Press TEST while these test indicators are on.

3.To terminate this test, press the TEST switch.

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DSU 56/64 User Manual

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ADTRAN DSU 56 user manual FAR END Tests, Remote Digital
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DSU 56 specifications

The ADTRAN DSU 56 is an essential device for businesses and organizations looking to establish reliable serial communication over digital circuits. A Data Service Unit (DSU) acts as a bridge, converting digital data from a Local Area Network (LAN) into a format suitable for transmission over telephone lines or other digital links. The DSU 56 is specifically designed to operate at 56 Kbps, making it a vital component in many networking setups where higher bandwidth is unnecessary.

One of the main features of the ADTRAN DSU 56 is its ability to support a variety of interfaces. It is equipped with both V.35 and RS-232 ports, allowing for flexible connectivity options to diverse networking equipment and configurations. This versatility ensures that organizations can easily integrate the DSU 56 into their existing telecommunications infrastructure.

The DSU 56 is built on advanced technologies that ensure efficient data transfer and reliability. It incorporates error correction mechanisms and extensive diagnostic capabilities, which help identify and troubleshoot issues quickly. This is particularly important in mission-critical applications where downtime can lead to significant operational disruptions.

In addition to reliable data conversion, the DSU 56 offers features like loopback testing and performance monitoring. These functionalities enable network administrators to assess the health and performance of the connection with ease. Loopback tests can be initiated locally or remotely, allowing for thorough testing of the entire data path without disrupting ongoing operations.

Another notable characteristic of the ADTRAN DSU 56 is its compact and robust design. It is built to withstand various operating conditions, making it suitable for deployment in different environments, including data centers and remote installations. The device is also energy efficient, contributing to lower operational costs.

The DSU 56 supports various protocols, such as Frame Relay and PPP, ensuring compatibility with numerous public and private network infrastructures. This adaptability makes it a valuable asset for businesses transitioning to digital communication systems or those seeking to enhance their existing setups.

In conclusion, the ADTRAN DSU 56 stands out as a reliable and versatile solution for organizations needing to facilitate effective data communication over digital circuits. Its robust features, combined with advanced technologies, position it well in the marketplace, making it a choice for businesses focused on maintaining high-quality connectivity.
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