ADTRAN SHDSL NxNTU specifications Back-to-Back NTU Operation, Full Nx64k 2 Mbps Service

Full Nx64k 2 Mbps Service is set up using the quick key “N,” and then selecting “A” to save the changes. The screen in Figure 10 illustrates a cross-connect map configured for Full Nx64k 2 Mbps Service.

In addition, when setting up Full Nx64k 2 Mbps Service, the type of line interface must be specified. V.35, V.36, or X.21 may be selected. To reach this portion of the menu, select “2,” Provisioning, from the main menu, and choose the local or the remote unit provisioning. Select “4,” Nx64k Options, and then select “2,” Interface Type Manual Select. Finally, enter the desired line interface.

Back-to-Back NTU Operation

The NTU supports back-to-back operation

(Figure 11)

1.One NTU must be configured as the NT (STU-R)

2.The other NTU must be configured as the LT (STU-C)

The STU-C and STU-R modes are selected via the local management port only. The default mode for the NxNTU is STU-R.

NOTE

For the LT (STU-C), Network and Customer direction are opposite of ITU G.991.2 specification definitions. In a back-to-back configuration, the “Network” direction is always toward the SHDSL port and the “Customer” direction is always away from the SHDSL port

Circuit

ID:

01-Jan-00

23:41:06

Unit Mode:

NT

Provisioning Type: Local

Cross-Connect Map

SHDSL Timeslots

G.703 Timeslots

TS0

= 33

TS12 = 33

TS24

= 33

TS0

=

0

TS12 = 0

TS24

= 0

TS1

= 33

TS13 = 33

TS25

= 33

TS1

=

0

TS13 = 0

TS25

= 0

TS2

= 33

TS14 = 33

TS26

= 33

TS2

=

0

TS14 = 0

TS26

= 0

TS3

= 33

TS15 = 33

TS27

= 33

TS3

=

0

TS15 = 0

TS27

= 0

TS4

= 33

TS16 = 33

TS28

= 33

TS4

=

0

TS16 = 0

TS28

= 0

TS5

= 33

TS17 = 33

TS29

= 33

TS5

=

0

TS17 = 0

TS29

= 0

TS6

= 33

TS18 = 33

TS30

= 33

TS6

=

0

TS18 = 0

TS30

= 0

TS7

= 33

TS19 = 33

TS31

= 33

TS7

=

0

TS19 = 0

TS31

= 0

TS8

= 33

TS20 = 33

TS32

= N/A

TS8

=

0

TS20 = 0

TS9

= 33

TS21 = 33

TS33

= N/A

TS9

=

0

TS21 = 0

TS10 = 33

TS22 = 33

TS34

= N/A

TS10

=

0

TS22 = 0

TS11 = 33

TS23 = 33

TS35

= N/A

TS11

=

0

TS23 = 0

Timeslot

Assignments

Commands

0.

Idle

A.

Apply New Map

G.

Full G.703 Service

1.-31.

G.703 Service 1-31

U.

Undo New

Map

N.

Full Nx64K Service

32.

G.704 Frame

Tab. Select

SHDSL or G.703 Timeslots

33.

Nx64K Service

Arrow Keys.

Move Cursor

G.704

Framing = Unframed

Figure 10. Full Nx64k 2 Mbps Service

X.21,	NT (STU-R)		LT (STU-C)		X.21,
V.35 or	SHDSL NTU		SHDSL NTU		V.35 or
V.36					V.36
Nx64k	Nx64k	SHDSL		Nx64k	Nx64k
Subscriber		Line			Subscriber
	SHDSL		SHDSL
E1	E1			E1	E1
E1			Local		E1
	G.703			G.703
Subscriber			Management		Subscriber
	G.704			G.704
			Port
					VT100
					Terminal

Figure 11. Back-to-Back NTU Operation

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