ADTRAN TR OCU DP Installation And Maintenance Practice

Contents

ADTRAN TR OCU DP Installation And Maintenance Practice Manual pdf 16 page image

Total Reach Office Channel Unit Data Port Installation and Maintenance Practice10 61292006L1-5CDual Function LBK ButtonThe TR OCU DP front panel loopback pushbutton (LBK) allows loopbacks to be activatedwithout test equipment or centralized test coordination.• Pressing the LBK button once loops the TR DDS-R toward the network.• Pressing the LBK button during an active loopback releases any loopbacks in the TotalReach system.• Pressing and holding the LBK button for five seconds toggles between local and alternate(remotely-provisioned) option settings.Loopback LED OperationThe TR OCU DP system loopback status is indicated by the front panel NTWK LBK and CUSTLBK LEDs. An active loopback occurring at the unit being viewed is indicated by a solidloopback LED. A flashing loopback LED indicates a loopback condition at the remote unit.When a loopback toward the network is initiated, the NTWK LBK LED is illuminated. Aloopback generated toward the customer illuminates the CUST LBK LED.TR OCU DP Bidirectional Loopback SupportThe TR OCU DP will execute a bidirectional loopback when performing an OCU DP loopbackat the TR OCU DP. This allows a standard portable DDS test set, connected to the 4-wirecustomer interface of the TR DDS-R, to verify the integrity of the 4-wire loop by transmitting atest pattern and examining the returning data for synchronization and errors. The TR OCU DPNTWK LBK and CUST LBK indicators illuminate during a TR OCU DP bidirectional loopback.Refer to Figure 5 for an illustration of the bidirectional loopback. The latching and alternatingloopback sequences are defined in Table 6 and Table 7.Figure 5. OCU DP Bidirectional LoopbackTROCU DPBidirectionalloopbackCustomerIntra-office