ADTRAN SHDSL NxNTU Manual de usuario descargar pdf (Pagina 14)

14 61225101L1-5B

Local Customer Transparent Loopback – Provides

a loopback at the NTU in the customer direction

(Figure 14). Data is passed transparently to the

network side.

Local Network Transparent Loopback – Provides a

loopback at the NTU in the network direction (Figure

18). Data is passed transparently to the customer side.

Figure 14. Local Customer Transparent

Loopback

Remote Customer Transparent Loopback –

Initiated at the NTU and provides a loopback at the

LTU in the customer direction (Figure 15). Data is

passed transparently to the network side.

NTU

TX Data

LT U

Figure 15. Remote Customer Transparent

Loopback

Local Customer Nontransparent Loopback –

Provides a loopback at the NTU in the customer

direction (Figure 16). AIS signal is injected into the

network side.

Remote Customer Nontransparent Loopback –

Initiated at the NTU and provides a loopback at the

LTU in the customer direction (Figure 17). AIS

signal is injected into the network side.

Figure 16. Local Customer Nontransparent

Loopback

NTU

TX AIS

LT U

Figure 17. Remote Customer Nontransparent

Loopback

Remote Network Transparent Loopback – Initiated

at the NTU and provides a loopback at the LTU in the

network direction (Figure 19). Data is passed

transparently to the customer side.

Local Network Nontransparent Loopback –

Provides a loopback at the NTU in the network

direction (Figure 20). AIS signal is injected into the

customer side.

Local Network Nontransparent Loopback –

Initiated at the NTU and provides a loopback at the

LTU in the network direction (Figure 21). AIS signal

is injected into the customer side.

NTU

TX Data

LT U

Figure 18. Local Network Transparent

Loopback

NTU

TX Data

LT U

Figure 19. Remote Network Transparent

Loopback

NTU

TX AIS

LT U

Figure 20. Local Network Nontransparent

Loopback

NTU

TX AIS

LT U

Figure 21. Remote Network Nontransparent

Loopback

NTU

TX Data

LT U

NTU

TX AIS

LT U

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