ADTRAN SHDSL NxNTU Installation And Maintenance Manual

Contents

ADTRAN SHDSL NxNTU Installation And Maintenance Manual Manual pdf 14 page image

14 61225101L1-5BLocal Customer Transparent Loopback – Providesa loopback at the NTU in the customer direction(Figure 14). Data is passed transparently to thenetwork side.Local Network Transparent Loopback – Provides aloopback at the NTU in the network direction (Figure18). Data is passed transparently to the customer side.Figure 14. Local Customer TransparentLoopbackRemote Customer Transparent Loopback –Initiated at the NTU and provides a loopback at theLTU in the customer direction (Figure 15). Data ispassed transparently to the network side.NTUTX DataLTUFigure 15. Remote Customer TransparentLoopbackLocal Customer Nontransparent Loopback –Provides a loopback at the NTU in the customerdirection (Figure 16). AIS signal is injected into thenetwork side.Remote Customer Nontransparent Loopback –Initiated at the NTU and provides a loopback at theLTU in the customer direction (Figure 17). AISsignal is injected into the network side.Figure 16. Local Customer NontransparentLoopbackNTUTX AISLTUFigure 17. Remote Customer NontransparentLoopbackRemote Network Transparent Loopback – Initiatedat the NTU and provides a loopback at the LTU in thenetwork direction (Figure 19). Data is passedtransparently to the customer side.Local Network Nontransparent Loopback –Provides a loopback at the NTU in the networkdirection (Figure 20). AIS signal is injected into thecustomer side.Local Network Nontransparent Loopback –Initiated at the NTU and provides a loopback at theLTU in the network direction (Figure 21). AIS signalis injected into the customer side.NTUTX DataLTUFigure 18. Local Network TransparentLoopbackNTU TX DataLTUFigure 19. Remote Network TransparentLoopbackNTUTX AISLTUFigure 20. Local Network NontransparentLoopbackNTU TX AISLTUFigure 21. Remote Network NontransparentLoopbackNTU TX Data LTUNTU TX AIS LTU