Tsu, Network Loopback Tests | ADTRAN TSU 600 manual

Chapter 1. Introduction

Classes of Loopbacks

There are two classes of loopbacks: network interface and DTE interface.

Network Interface Loopbacks

Network interface loopbacks (see Figure 1-9) affect the entire T1 data stream. There are two types of network loopbacks, line loopback and payload loopback.

Line loopback loops all of the received data back toward the network. The transmitted data is the identical line code that was received, including any bipolar violations or framing errors.

Payload loopback is similar to line loopback, except that the framing is extracted from the received data and then regenerated for the transmitted data.

TSU 600

NI CSU

DS1

Payload Loopback

Line Loopback

Secondary

Interface

Figure 1-9

Network Loopback Tests

DTE Interface Loopbacks

DTE interface loopbacks affect only that portion of the data stream programmed to that particular interface port. The Nx56/64 serial interface offers two loop- backs, a DTE loopback and a port loopback. See Figures 1-10 and 1-11.

DTE loopback loops all data from the DTE back towards the DTE. This loopback occurs just past the interface circuit allowing a verification of the opera- tion of the DTE to TSU 600. This loopback may be initiated by using front panel or T-Watch commands. The DTE (or external test equipment) must provide any test pattern in order to check the DTE interface. See Figure 1-10.

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TSU 600 User Manual

61200.076L2-1

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ADTRAN TSU 600 user manual Tsu, Network Loopback Tests

Contents

TSU Part Number 1200076L2 1200076L2#DC Table of Contents Service Type Table of Contents Table of Contents Installation Operation Table of Contents Example Operations Figures 15. Drop and Insert, Voice, and Bridging Application Set Up Tables T1 Service Offerings T1/FT1 Overview Fractional T1 TSU 600 Overview Functional DescriptionFront View of the TSU Introduction Identification of Rear Panel Layout TSU 600 Rear Panel Features of the TSU TSU Interfaces Network InterfaceTSU 600 Interfaces Control Port Input Chain Port Output Adtran PC Program Three Methods of ControlFront Panel Snmp Option Slot Arrangement SlotSlots TSU 600 Option Slot Arrangement Option Ports Secondary Interfaces SIOther Data Interfaces TSU 600 Clock Sources Network TimedNetwork Timed Clock Source DTE Timed DTE Clock Source Internal Timing Internal Clock Source Normal CSU Timing TSU 600 Testing Self TestsLoopback Tests TSU Network Loopback Tests DTE Interface Loopback Port Interface Loopback Pattern Generation TSU 600 Option Modules TSU 600 Configuration ApplicationsBridge, PBX, Video Conferencing Application Set Up Bridge, PBX, Video Conferencing Application All Voice Application Set Up All Voice Application Drop and Insert, Voice, and Bridging Application Variations of Mixed Applications Variations of Mixed Applications UNPACK, INSPECT, Power Connection Shipped by AdtranProvided by Customer Power Connection Warranty and Customer Service Grounding Instructions UL Installation Wiring NetworkNetwork Pinout Control In/Chain-in GND Chain-out Chain-out Pinout Power UP Testing and Initialization Self Test Set User Passcode To Establish a Passcode Set Unit Identification No Passcode Desired Set Control Port Control In PC Example of Chain-in Normal Power-Up Procedure Correct Passcode Operation Identification of Front Panel Layout TSU 600 Front Panel Layout TSU Alarm red Used in various menus to clear data/result fields General Menu Operation Select a Menu Item Sample Submenu Data Port Identification Display and Data Fields Module Slots, TSU Menu Structure Four Opening Menus Opening Menu Functions Display of Opening Menus Shows status of incoming commands on the chain-in port Displays and can be used to set the time and date Opening Menu Functions Detailed Discussion Status Complete Status Menu Network Performance Reports NI Perf Rpts 1NI Perf RptsNetwork Interface Performance Report Network Interface Errors NI Errors Active Alarms Network Interface Error Type View History Port Status Remote Port Configuration Config Complete Configuration Menu Format YEL AlarmNetwork NI D4 is equivalent to superframe format SF SET LBO Xmit PRMClock Source Inband Lpbck Access CTL PortTraps Map Exchange Selection Display OFFAuto Selection Times for Map Exchange DS0 Map Designations Copy a Temp Create Temp Create Temp Selection Screen Review MAP AB Selected Port and Quantity of DS0s Review TempEdit Temp Apply Temp a Port Configuration Port Config Port Configuration Utility Util Complete Utility Menu Tree Time/Date Factory Restore Set Passcode Unit ID ID Software Revision Software Rev Port Utility Test Complete Test Menu Network Tests Remote Loopbck All zeros Qrss always runs at 64K/DS0 Than 320 bit errors Bit errorThan 1 bit error and less than Since the start of testing Run Selftest Cancel Tests Port Tests Operation Voice and Data MIX Example of Voice and Data Mix Configuration for Network Interface Steps to SET UP Voice and Data MIXConfigure the Network Prior to Step Configure DTE Port 1.1 Nx56/64 From Option Module Configuration for DTE PortSelect the number of DS0s/Port12 Complete the DS0 Map Configuration Configuration for DS0 MapNx56/64 Configuration for DSX-1 PBX Passthru Complete a Configuration Table for the DSX-1 PBX PassthruActivate Configuration Menu First Two Configuration Menu Items Configuring the Network Interface First Two Network NI Configuration Menu Items First Two Network NI Menu Items Configuring the DS0 MAP DS0 Map a and Map B Configuration Menu ItemsCreate Map Menu with Displayed DS0 Number Passthru Selection Field Display of DS0 Port Name Example Operations Temporary MAP ReviewReview Screen Edit Window Showing Edit Temp Option Window Showing the Error Configuring the Ports Window Showing Port Configuration OptionScreen Used To Change Mode Example Operations Testing Example Far End Looped Back Test Test Menu One 101 Four Test Submenu Windows Screen that Appears During Loopback Verification Test Pattern Screen for Qrss all DS0s Pressing the 2 key results in injecting errors SES Test Termination 106 Appendix a TSU 600 Complete Menu Tree Figure A-1 DTE Data Rate Chart DTE Data Rate vs. DS0s DTE RATE=56K DTE RATE=64K Appendix C System Configuration Charts Configure Network Rate Chart Configure DTE Port 1.1 Nx56/64Configuration Chart for DTE Port Select number of DS0s/PORT DS0 Map a Configuration DS0 Map a ConfigurationDS0 Map B Configuration DS0 Map B Configuration 114 Alarm Messages Network Interface NI Status Messages Network Interface NI 116 Symbols Index DTE Qrss 120 Product Support Information