ADTRAN DSU 56 user manual Test Pattern Ptrn

Page 36

Chapter 3. Test Modes

Test Pattern (PTRN)

When the PTRN test is initiated, the local DSU 56/64 uses the integral test pattern generator to transmit a standard 2047 test pattern to the DSU on the far end of the circuit. The local DSU 56/ 64 then examines the received data for the standard 2047 pattern. Once this pattern is detected and synchronization is achieved, the ERROR indicator is turned off. The ERROR indicator turns on when errors in the receive data pattern are detected. While this test is active, errors can be injected into the transmit data stream by pressing the SELECT push-button. The PTRN LED flashes during initialization of the test and turns on solid once the test is in progress.

To initiate the PTRN test, perform the following steps:

1.Press SELECT seven times to turn on the PTRN test indicator.

2.Press the TEST switch while this test indicator is on.

3.To terminate this test, press TEST.

3-8

DSU 56/64 User Manual

61200062L1-1

Image 36

Contents DSU 56/64 Page Important Safety Instructions Save These Important Safety InstructionsAffidavit Requirements for Connection to Digital Services Page Page Service Type Digital Facility Service Order Code Canadian Emissions Requirements Canadian Equipment Limitations Limited Product Warranty Customer Service, Product Support Information, and Training Presales Inquiries and Applications SupportPost-Sale Support Repair and ReturnTraining Table of Contents Appendix A. Pinouts Appendix B. Specifications Index Index-1 List of Figures DSU 56/64 UnitList of Figures Xvi List of Tables List of Tables Xviii Introduction Product OverviewFront Panel Network Status RedTest Status/Error Yellow/Red Being utilized for testingTest Switches LoopRear Panel DSU 56/64 Rear PanelInstallation UNPACK, INSPECT, Power UPConfiguration Clear to Send Delay CS Delay SW Switch PositionClear To Send CS SW Down Normal Up OnAntistream SW Down OffCarrier Detect CD SE Down Normal Data Set Ready SR SW Down OnRemote Digital Loopback RDL SW Down Enable Up DisableLoop Rate SW Down 56 Kbps Up 64 kbpsDefault Option Switch Settings Switch Position SettingNetwork Connections DTE ConnectionsInstallation Self Test Test ModesNear END Tests DTE only TestDTE with Test Pattern TP DTE with TP Test Diagram DTE and Loop Test LLDTE and Loop Test Diagram Loop Only Test Diagram Loop only Test RTFAR END Tests Remote DigitalTest Pattern Ptrn Remote Tests Test Modes Appendix a Pinouts Table A-2. V.35 DTE Pinouts PinDescription Appendix B Specifications Specifications and FeaturesDiagnostics PowerHardware Specifications EnvironmentIndex Index-2

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.