ADTRAN TR OCU DP Installation And Maintenance Practice

Contents

ADTRAN TR OCU DP Installation And Maintenance Practice Manual pdf 11 page image

Installation61292006L1-5C 5Synchronization and LED IndicationThe TR OCU DP and TR DDS-R typically require 30 to 90 seconds to reach synchronization.Once synchronized, the SYNC LED turns green. All other LEDs remain off until network occur-rences cause them to turn on. If the units cannot synchronize, examine the T/R pair for open(or short) circuit conditions or load coils. For more information, refer to “Troubleshooting” onpage 15.Front Panel LEDsThe TR OCU DP provides front panel LEDs to display status information. Table 2 lists the TROCU DP LEDs and status descriptions.Signal PairThe TR OCU DP plugs directly into either a WECO-compatible D4 channel bank, AT&T SLC-96 terminal, or an ADTRAN ACT 1900/2300 channel bank. This requires no special wiring.The 2-wire loop uses the T/R (Tip and Ring) pair pins 24 and 51 of the D4 backplane. TheTotal Reach DDS system is not polarity sensitive.Table 2. Front Panel LEDsLabel Status DescriptionSYNC zzGreenRedLoop synchronizedLoop not synchronized(Red indicates that the is no synchronization between the TROCU DP and the remote TR DDS-R; check for continuity, loadcoils, and other abnormal line conditions.)LOOP OPEN z Red No sealing current on local loop(Check for continuity and proper Total Reach DDS terminationat remote end TR DDS-R.)CRC z Red Errors on the 2-wire loop(Check for abnormal loop conditions.)QM DISC z Red Quality Monitor Disconnect has occurredNO DSU z Yellow Customer DSU/CSU is not responding or installed, asdetermined by the TR DDS-RNTWK LBK zYellowFlashing YellowAn OCU loopback toward the network exists at the TR OCUDP.A loopback toward the network exists at the TR DDS-R or achannel loopback at the CSU.CUST LBK z Yellow Loopback toward the customer exists at the TR OCU DP.AP zGreenFlashing GreenUnit has been remotely provisioned.Flashing: The remote control link is active. Push and hold theLBK button for five seconds to toggle between manual andremote provisioning.