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12 61225101L1-5B
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
Figure 10. Full Nx64k 2 Mbps Service
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 11. Back-to-Back NTU Operation
Nx64k
Subscriber
E1
Subscriber
Nx64k
SHDSL
SHDSL NTU SHDSL NTU
NT (STU-R) LT (STU-C)
SHDSL
Line
X.21,
V.35 or
V.36
E1
X.21,
V.35 or
V.36
E1
E1
G.703
G.704
Nx64k
Subscriber
E1
Subscriber
VT100
Terminal
Local
Management
Port
Nx64k
SHDSL
E1
G.703
G.704