ADTRAN Network Card SHDSL NxNTU User Manual

Section 61225101L1-5B  
Issue 2, December 2002  
Express 6530 SHDSL NxNTU  
Installation and Maintenance  
CONTENTS  
1. GENERAL .....................................................................1  
2. CONNECTIONS ...........................................................4  
3. OPTIONING ..................................................................7  
4. SPECIFICATIONS......................................................18  
5. WARRANTY AND CUSTOMER SERVICE ............19  
RTS/C  
Nx64K  
G.703  
SHDSL  
RLSD/I  
T
BER  
RLOOP  
LLOOP  
R
T
BE  
P
OO  
L
E
OT  
M
RE  
P
/
OO  
L
L
CA  
LO  
T
EC  
EL  
S
RT  
J
IN  
PO  
R
ER  
Express  
6530  
FIGURES  
Figure 1. Express 6530 SHDSL NxNTU ...................... 1  
Figure 2. Express 6530 Functional Overview ............... 2  
Figure 3. Express 6530 Back Panel ................................4  
Figure 4. Express 6530 Strap Map .................................7  
Figure 5. Express 6530 Menu Tree.................................8  
Figure 6. Cross-Connect Map .........................................9  
Figure 7. Time Slot Allocation .....................................10  
Figure 8. Framed Full E1 Service .................................11  
Figure 9. Unframed Full E1 Service .............................11  
Figure 10. Full Nx64k 2 Mbps Service ..........................12  
Figure 11. Back-to-Back NTU Operation ......................12  
Figure 12. Local Dual Sided Loopback .........................13  
Figure 13. Remote Dual Sided Loopback ......................13  
Figure 14. Local Customer Transparent Loopback ........14  
Figure 15. Remote Customer Transparent Loopback ....14  
Figure 16. Local Customer Nontransparent Loopback ..14  
Figure 17. Remote Customer Nontransparent  
Figure 1. Express 6530 SHDSL NxNTU  
Line (SHDSL) technology to transport data over a  
single copper loop. The Express 6530 interfaces  
between the incoming ITU G.991.2 (SHDSL)  
leased-line service and the customer’s Data Terminal  
Equipment (DTE), providing solutions for  
LAN-to-LAN bridging, Frame Relay, and/or PBX  
termination.  
The Express 6530 is a locally powered standalone unit  
which contains an integrated Data Service Unit  
(DSU), eliminating the need for a separate DSU. The  
Express 6530 interfaces to a customer’s G.703, V.35,  
or X.21 interfaces and can be provisioned to support  
simultaneous G.703 and Nx64 services. The SHDSL  
interface is designed to operate from 192 kbps to  
2.304 Mbps in 64 kbps increments or from 3 to 36  
time slots, with each time slot representing 64 kbps.  
The SHDSL time slots can be multiplexed to the  
G.703 and/or the Nx64 interfaces. The maximum  
number of time slots that can be directed toward the  
G.703 interface is 32 (2.048 Mbps), while the Nx64  
can support 36 (2.304 Mbps). A block diagram of the  
Express 6530 functionality is illustrated in Figure 2.  
Loopback .......................................................14  
Figure 18. Local Network Transparent Loopback .........14  
Figure 19. Remote Network Transparent Loopback ......14  
Figure 20. Local Network Nontransparent Loopback ....14  
Figure 21. Remote Network Nontransparent  
Loopback .......................................................14  
Figure 22. CRC-4 Detection/Generation ........................16  
TABLES  
Table 1.  
Table 2.  
Table 3.  
Table 4.  
Table 5.  
Table 6.  
Table 7.  
Table 8.  
Table 9.  
LED Descriptions ............................................2  
Front Panel Pushbuttons ..................................3  
SHDSL Pin Connections .................................4  
G.703 Pin Connections....................................4  
V.28 Pin Connections ......................................5  
X.21 Pin Connections ......................................5  
V.35 Pin Connections ......................................6  
V.36 Pin Connections ......................................6  
Loopback Overview ......................................15  
The Express 6530 can be deployed in pairs for a local  
campus application or to an LTU located in a Central  
Office. The Express 6530 can be locally or remotely  
provisioned with local provisioning being  
accomplished through the V.28 control port using a  
dumb terminal or PC with a terminal emulation  
program. The Express 6530 can be remotely  
provisioned by another Express 6530 or an ADTRAN  
SHDSL LTU. The Express 6530 can initiate and  
respond to local and remote loopbacks and has an  
internal 215-1 pseudorandom test pattern for bit error  
testing. Front panel-mounted LEDs and pushbuttons  
provide interface and test status as well as the  
initiation of a remote or local loopback.  
Table 10. Express 6530 SHDSL NxNTU  
Specifications ................................................18  
1. GENERAL  
This practice contains installation and maintenance  
information for the Express 6530 SHDSL NxNTU,  
P/N 1225101L1. The unit is illustrated in Figure 1.  
The ADTRAN Express 6530 is a network terminating  
unit using Single-Pair High Speed Digital Subscriber  
Trademarks: Any brand names and product names included in this document are  
trademarks, registered trademarks, or trade names of their respective holders.  
61225101L1-5B  
1
 
The Express 6530 has four front panel pushbuttons.  
The buttons are protected from accidental operation.  
The front panel button functions can be disabled via  
the management interface. It is possible to disable the  
port select SHDSL option to avoid the possibility of  
looping the SHDSL port when disabled. Table 2 lists  
and describes these four pushbuttons.  
4. When the G.703 port is selected, the G.703 port  
LED flashes as an indication.  
If there is only a single service on the G.703 port  
then the Local Loop/Err Inj, Remote Loop and  
BERT buttons initiate/terminate tests and the  
corresponding LEDs indicate the status of tests  
on this port only.  
The “Port Select” button operates in the following  
manner:  
If there are multiple services, the G.703 port  
Local Loop/Err Inj, Remote Loop, and BERT  
buttons are disabled, and the corresponding LEDs  
indicate the status of tests on this port only  
(initiated from sources other than the front panel  
buttons).  
1. When no port has been selected (indicated by  
none of the port LEDs flashing), then only the  
“Port Select” button is enabled and the LL, RL  
and BERT LEDs are an ordered summation of  
the test states of the Nx64k, G.703 and SHDSL  
interfaces.  
5. When the SHDSL port is selected, the SHDSL  
port LED flashes as an indication. Note that the  
SHDSL port select can only occur if enabled via  
the management interface. The Local Loop/Err  
Inj, Remote Loop, and BERT buttons will  
2. The Port Select button cycles through the  
following ports on each successive press:  
• Nx64k  
initiate/terminate tests and the corresponding  
LEDs indicate the status of tests on this port only.  
These tests are on the aggregate SHDSL payload  
• G.703  
• SHDSL (only if enabled via the EOC)  
• No Selection  
3. When the Nx64k port is selected, the Nx64k LED  
will flash as an indication. The Local Loop/Err  
Inj, Remote Loop and BERT buttons will initiate/  
terminate tests and the corresponding LEDs  
indicate the status of tests on this port only.  
Port Select will not operate if any locally initiated  
tests are in progress.  
Table 2. Front Panel Pushbuttons  
Button Label  
Description  
On each successive press, cycles through the following:  
Nx64k, G.703, SHDSL, and No Select.  
PORT SELECT  
If a port is selected, and a BERT is not in progress then  
pressing the button will initiate/terminate a local loopback  
test on the selected port. If a BERT is in progress, then  
pressing the button injects a single bit error.  
LOCAL LOOP/ ERR INJ  
REMOTE LOOP  
If the SHDSL port is selected, then pressing the button will  
initiate/terminate a remote loopback test on the port by  
sending a request message to the remote unit. If the  
Nx64k port or G.703 port (with only one service defined)  
is selected, then pressing the button will initiate/terminate a  
remote loopback test on the selected port's single data  
service by sending in-band loop up/down patterns to the far  
end.  
If a port is selected and there are no local loopback tests  
active, then pressing the button will start or stop a BERT  
on the selected port.  
BERT  
61225101L1-5B  
3
 
2. CONNECTIONS  
The 120 ohm balanced G.703 port uses a RJ-45  
connector with the pinouts defined in Table 4. The  
G.703 port supports a 2048 Kbps port using a 120  
ohm balanced interface that conforms to ITU-T G.703  
section 9.  
Back Panel Features  
The back panel of the Express 6530 SHDSL NxNTU  
is illustrated in Figure 3.  
The SHDSL port uses a RJ-45 connector with the  
interchange circuits and pinouts listed in Table 3.  
Nx64K  
CUSTOMER  
G.703  
NETWORK  
SHDSL  
CONTROL  
X.21  
V.35 / V.36  
V.28  
Figure 3. Express 6530 Back Panel  
Table 3. SHDSL Pin Connections  
Interchange Name  
Description  
No Connection  
SHDSL tip  
Pinout  
1,2,3  
4
N/C  
tip  
ring  
N/C  
SHDSL ring  
No Connection  
5
6,7,8  
Table 4. G.703 Pin Connections  
Pin Function  
1 Receive pair (ring)  
2 Receive pair (tip)  
3 Receive shield  
4
Transmit pair (ring)  
5 Transmit pair (tip)  
Transmit shield  
6
7 NC  
8 NC  
4
61225101L1-5B  
 
The local management port is a DB-9 female  
connector and is labeled V.28. The interchange  
circuits and pinouts are listed in Table 5. The local  
management baud rate will auto-detect between 2400  
baud and 57600 baud.  
See EIA-574, Sec 2.2 and Figure 2.7, with Receive  
Data, Transmit Data and Signal Ground only. The  
other pins are internally connected to ensure correct  
handshaking interoperability. These internal  
connections shall be made via resistor traces to  
facilitate with future build options.  
Table 6 defines the X.21 port pin connections.  
Table 5. V.28 Pin Connections  
Interchange Name  
Description  
Pinout  
Data Carrier Detect - Internally connected to DTR  
and DSR  
DCD  
1
RXD  
TXD  
Receive Data  
Transmit Data  
2
3
Data Terminal Ready - Internally connected to  
DCD and DSR  
DTR  
GND  
DSR  
4
5
6
Signal Ground  
Data Set Ready - Internally connected to DCD  
and DTR  
RTS  
Ready To Send - Internally connected to CTS  
7
CTS  
NC  
Clear To Send - Internally connected to RTS  
No Connection  
8
9
Table 6. X.21 Pin Connections  
Circuit Number Circuit Name  
To/From DCE  
Pinout (A/B)  
G
Ga  
T
Signal Ground  
8
DTE Common Return  
Transmit  
15  
FROM  
TO  
2/9  
4/11  
3/10  
5/12  
6/13  
7/14  
1
R
C
I
Receive  
Control  
FROM  
FROM  
Indication  
S
Signal Element Timing  
DTE Signal Element Timing  
Shield Ground Option  
X
TO  
61225101L1-5B  
5
 
Table 7 defines the V.35 port pin connections.  
Table 7. V.35 Pin Connections  
Table 8 defines the V.36 port pin connections.  
Circuit Number Circuit Name  
To/From DCE  
Pinout (A/B)  
102  
102-3  
104  
105  
106  
107  
108/2  
109  
113  
114  
115  
140  
141  
142  
Signal Ground  
B
Transmit Data  
TO  
P/S  
R/T  
C
Receive Data  
FROM  
TO  
Request to Send  
Clear to Send  
FROM  
FROM  
TO  
D
Data Set Ready  
E
Data Terminal Ready  
Received Line Signal Detect  
H
FROM  
F
Transmit Signal Element Timing TO  
Transmit Signal Element Timing FROM  
Receive Signal Element Timing  
U/W  
Y/AA  
V/X  
N
Remote Loopback  
Local Loopback  
Test Indicator  
TO  
TO  
L
FROM  
NN  
Table 8. V.36 Pin Connections  
Circuit Number Circuit Name  
To/From DCE  
Pinout (A/B)  
19, 37, 20  
4/22  
102, 102a, 102b  
Signal Ground  
Transmit Data  
Receive Data  
103  
104  
105  
106  
107  
108/2  
109  
113  
114  
115  
140  
141  
142  
TO  
FROM  
TO  
6/24  
Request to Send  
Clear to Send  
7/25  
FROM  
FROM  
TO  
9/27  
Data Set Ready  
Data Terminal Ready  
11/29  
12/30  
13/31  
17/35  
5/23  
Received Line Signal Detect  
FROM  
Transmit Signal Element Timing TO  
Transmit Signal Element Timing FROM  
Receive Signal Element Timing  
Remote Loopback  
Local Loopback  
FROM  
TO  
8/26  
14  
TO  
10  
Test Indicator  
FROM  
18  
6
61225101L1-5B  
 
3. OPTIONING  
Hardware Optioning  
The strap map for the Express 6530 SHDSL NxNTU  
is illustrated in Figure 4.  
Figure 4. Express 6530 Strap Map  
61225101L1-5B  
7
 
Software Optioning  
The menu tree in Figure 5 illustrates the path to every  
provisioning, performance monitoring, and test access  
point in the Express 6530 menu system.  
8
61225101L1-5B  
 
1. - 31. G.703 Service  
Cross-Connect Map  
The selected time slot will carry G.703 service (Refer  
to the Full G.703 Services subsection for more  
information).  
The purpose of the cross-connect map is to allocate  
the time slots (TS0s) from the SHDSL loop to user  
ports (E1, V.35/X.21) and configure framing. The  
cross-connect maps can be accessed via the VT100  
terminal screens. Select “1,” Provisioning, from the  
Main Menu. Choose to provision the local unit  
(Selection 1) or the remote unit (Selection 2). Next,  
select “1,” Unit Options, and then “3,” Cross Connect  
Map. The cross-connect map is shown in Figure 6.  
32. G.704 Framing  
This option enables three different framing  
configurations. Framing is always set in the first time  
slot (TS0). The framing will be locally generated if  
32 is entered in the G.703 TS0 slot only. If 32 is  
entered in the G.703 TS0 and the SHDSL TS0, then  
the framing will be passed transparently between the  
G.703 and SHDSL ports. If values other than 32 are  
assigned to both the SHDSL TS0 slot and G.703 TS0  
slot then the operation is G.703 unframed (if other  
G.703 service values are assigned to the G.703 time  
slots).  
The cross-connect map is split down the middle in two  
sections. The left section of the map lists the SHDSL  
time slots and right section of the map lists the G.703  
time slots. The user builds a new pending map before  
making it active with the apply key. The options  
listed at the bottom of the screen allow the user to  
setup and manipulate the time slots. The statement  
under the list of commands indicates the framing  
status. Time slot configuration options are defined as  
follows:  
33. Nx64k Service  
The selected time slot will carry Nx64k service. The  
value assignment is only valid for the SHDSL time  
slots.  
0. Idle  
A. Apply New Map  
If a time slot is set for idle, an idle code is inserted.  
The pattern will always be FF hex (all 1s) toward the  
SHDSL network.  
This command saves and activates any changes made  
by the user.  
U. Undo New Map  
The idle pattern out the G.703 interface is  
programmable under the G.703 option. The default is  
value FF hex (all 1’s).  
This command will undo any changes made by the  
user since the last saved configuration. The new  
pending map will revert to the currently active time  
slot assignments.  
Circuit ID:  
01-Jan-00 22:03:22  
Unit Mode: NT  
Provisioning Type: Local  
Cross-Connect Map  
SHDSL Timeslots  
G.703 Timeslots  
TS12 = 1  
TS13 = 1  
TS14 = 1  
TS15 = 1  
TS16 = 1  
TS17 = 1  
TS18 = 1  
TS19 = 1  
TS20 = 1  
TS21 = 1  
TS22 = 1  
TS23 = 1  
Commands  
TS0 = 32  
TS1 = 1  
TS2 = 1  
TS3 = 1  
TS4 = 1  
TS5 = 1  
TS6 = 1  
TS7 = 1  
TS8 = 1  
TS9 = 1  
TS10 = 1  
TS11 = 1  
TS12 = 1  
TS13 = 1  
TS14 = 1  
TS15 = 1  
TS16 = 1  
TS17 = 1  
TS18 = 1  
TS19 = 1  
TS20 = 1  
TS21 = 1  
TS22 = 1  
TS23 = 1  
TS24 = 1  
TS25 = 1  
TS26 = 1  
TS27 = 1  
TS28 = 1  
TS29 = 1  
TS30 = 1  
TS31 = 1  
TS32 = N/A  
TS33 = N/A  
TS34 = N/A  
TS35 = N/A  
TS0 = 32  
TS1 = 1  
TS2 = 1  
TS3 = 1  
TS4 = 1  
TS5 = 1  
TS6 = 1  
TS7 = 1  
TS8 = 1  
TS9 = 1  
TS10 = 1  
TS11 = 1  
TS24 = 1  
TS25 = 1  
TS26 = 1  
TS27 = 1  
TS28 = 1  
TS29 = 1  
TS30 = 1  
TS31 = 1  
Timeslot Assignments  
0. Idle  
1.-31. G.703 Service 1-31  
32. G.704 Frame  
A. Apply New Map  
U. Undo New Map  
G. Full G.703 Service  
N. Full Nx64K Service  
Tab. Select SHDSL or G.703 Timeslots  
Arrow Keys. Move Cursor  
33. Nx64K Service  
G.704 Framing = LT Delivered  
Figure 6. Cross-Connect Map  
61225101L1-5B  
9
 
G. Full G.703 Service  
All unused time slots contain a configurable bit  
pattern that is set via the management interface. The  
default bit pattern is all 1s. Unused time slots are  
those which are sent out of the G.703 port, but are not  
part of a service. The G.703 port transmits the unused  
time slot patterns, and the receive ignores the unused  
time slots.  
If this quick key command is selected, the cross-  
connect map will automatically configure the time  
slots for Full G.703 service, and the framing will be  
set for transparent. Refer to the Typical Applications  
subsection for more information.  
N. Full Nx64k Service  
If this quick key command is selected, the  
cross-connect map will automatically configure the  
time slots for full Nx64k service. Refer to the Typical  
Applications subsection for more information.  
The service values (1-31) correlate to the G.703  
Services test options. These options provide the  
capability to loopback and test time slots by service  
value, so as not to affect other services in surrounding  
time slots.  
Tab. Select SHDSL or G.703 Timeslots  
The tab key moves the cursor between the SHDSL  
and G.703 sections of the cross-connect map.  
Arrow Keys. Move Cursor  
The arrow keys allow movement between the  
individual time slots.  
G.703 Service Time Slots  
A service is comprised of an arbitrary collection of  
time slots from the SHDSL interface that shall be  
configured via the management interface. Time slot  
allocation on an ordered noncontiguous basis is  
possible with each time slot within a service having  
the same delay. An example is illustrated in Figure 7.  
V.35  
Nx64k  
Port  
Nx64k Service  
14x64k  
V.35  
E1 Service 1  
(12 x 64k)  
E1 Service 2  
(10 x 64k)  
SHDSL Service  
NTU Generated  
TS0  
E1 Service  
E1 Port  
Figure 7. Time Slot Allocation  
10  
61225101L1-5B  
 
Unframed Full E1 Service is set up using the quick  
key “G,” entering “1” in both the SHDSL TS0 slot  
and the G.703 TS0 slot, and then selecting “A” to save  
the changes. The screen in Figure 9 illustrates a  
cross-connect map configured for Unframed Full E1  
Service.  
Typical Applications  
Framed Full E1 Service is set up using the quick key  
“G,” and then selecting “A” to save the changes. The  
screen in Figure 8 illustrates a cross-connect map  
configured for Framed Full E1 Service.  
Circuit ID:  
01-Jan-00 23:36:38  
Unit Mode: NT  
Provisioning Type: Local  
Cross-Connect Map  
SHDSL Timeslots  
G.703 Timeslots  
TS12 = 1  
TS13 = 1  
TS14 = 1  
TS15 = 1  
TS16 = 1  
TS17 = 1  
TS18 = 1  
TS19 = 1  
TS20 = 1  
TS21 = 1  
TS22 = 1  
TS23 = 1  
Commands  
TS0 = 32  
TS1 = 1  
TS2 = 1  
TS3 = 1  
TS4 = 1  
TS5 = 1  
TS6 = 1  
TS7 = 1  
TS8 = 1  
TS9 = 1  
TS10 = 1  
TS11 = 1  
TS12 = 1  
TS13 = 1  
TS14 = 1  
TS15 = 1  
TS16 = 1  
TS17 = 1  
TS18 = 1  
TS19 = 1  
TS20 = 1  
TS21 = 1  
TS22 = 1  
TS23 = 1  
TS24 = 1  
TS25 = 1  
TS26 = 1  
TS27 = 1  
TS28 = 1  
TS29 = 1  
TS30 = 1  
TS31 = 1  
TS32 = N/A  
TS33 = N/A  
TS34 = N/A  
TS35 = N/A  
TS0 = 32  
TS1 = 1  
TS2 = 1  
TS3 = 1  
TS4 = 1  
TS5 = 1  
TS6 = 1  
TS7 = 1  
TS8 = 1  
TS9 = 1  
TS10 = 1  
TS11 = 1  
TS24 = 1  
TS25 = 1  
TS26 = 1  
TS27 = 1  
TS28 = 1  
TS29 = 1  
TS30 = 1  
TS31 = 1  
Timeslot Assignments  
0. Idle  
1.-31. G.703 Service 1-31  
32. G.704 Frame  
A. Apply New Map  
U. Undo New Map  
G. Full G.703 Service  
N. Full Nx64K Service  
Tab. Select SHDSL or G.703 Timeslots  
Arrow Keys. Move Cursor  
33. Nx64K Service  
G.704 Framing = N/A  
Figure 8. Framed Full E1 Service  
Circuit ID:  
01-Jan-00 23:40:07  
Unit Mode: NT  
Provisioning Type: Local  
Cross-Connect Map  
SHDSL Timeslots  
G.703 Timeslots  
TS0 = 1  
TS1 = 1  
TS2 = 1  
TS3 = 1  
TS4 = 1  
TS5 = 1  
TS6 = 1  
TS7 = 1  
TS8 = 1  
TS9 = 1  
TS10 = 1  
TS11 = 1  
TS12 = 1  
TS13 = 1  
TS14 = 1  
TS15 = 1  
TS16 = 1  
TS17 = 1  
TS18 = 1  
TS19 = 1  
TS20 = 1  
TS21 = 1  
TS22 = 1  
TS23 = 1  
TS24 = 1  
TS25 = 1  
TS26 = 1  
TS27 = 1  
TS28 = 1  
TS29 = 1  
TS30 = 1  
TS31 = 1  
TS32 = N/A  
TS33 = N/A  
TS34 = N/A  
TS35 = N/A  
TS0 = 1  
TS1 = 1  
TS2 = 1  
TS3 = 1  
TS4 = 1  
TS5 = 1  
TS6 = 1  
TS7 = 1  
TS8 = 1  
TS9 = 1  
TS10 = 1  
TS11 = 1  
TS12 = 1  
TS13 = 1  
TS14 = 1  
TS15 = 1  
TS16 = 1  
TS17 = 1  
TS18 = 1  
TS19 = 1  
TS20 = 1  
TS21 = 1  
TS22 = 1  
TS23 = 1  
TS24 = 1  
TS25 = 1  
TS26 = 1  
TS27 = 1  
TS28 = 1  
TS29 = 1  
TS30 = 1  
TS31 = 1  
Timeslot Assignments  
0. Idle  
1.-31. G.703 Service 1-31  
32. G.704 Frame  
Commands  
A. Apply New Map  
U. Undo New Map  
G. Full G.703 Service  
N. Full Nx64K Service  
Tab. Select SHDSL or G.703 Timeslots  
Arrow Keys. Move Cursor  
33. Nx64K Service  
G.704 Framing = Unframed  
Figure 9. Unframed Full E1 Service  
61225101L1-5B  
11  
 
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.  
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.  
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.  
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,theNetworkdirectionisalways  
toward the SHDSL port and the “Customer”  
direction is always away from the SHDSL port  
Back-to-Back NTU Operation  
The NTU supports back-to-back operation  
(Figure 11)  
Circuit ID:  
01-Jan-00 23:41:06  
Unit Mode: NT  
Provisioning Type: Local  
Cross-Connect Map  
SHDSL Timeslots  
G.703 Timeslots  
TS12 = 0  
TS13 = 0  
TS14 = 0  
TS15 = 0  
TS16 = 0  
TS17 = 0  
TS18 = 0  
TS19 = 0  
TS20 = 0  
TS21 = 0  
TS22 = 0  
TS23 = 0  
Commands  
TS0 = 33  
TS1 = 33  
TS2 = 33  
TS3 = 33  
TS4 = 33  
TS5 = 33  
TS6 = 33  
TS7 = 33  
TS8 = 33  
TS9 = 33  
TS10 = 33  
TS11 = 33  
TS12 = 33  
TS13 = 33  
TS14 = 33  
TS15 = 33  
TS16 = 33  
TS17 = 33  
TS18 = 33  
TS19 = 33  
TS20 = 33  
TS21 = 33  
TS22 = 33  
TS23 = 33  
TS24 = 33  
TS25 = 33  
TS26 = 33  
TS27 = 33  
TS28 = 33  
TS29 = 33  
TS30 = 33  
TS31 = 33  
TS32 = N/A  
TS33 = N/A  
TS34 = N/A  
TS35 = N/A  
TS0 = 0  
TS1 = 0  
TS2 = 0  
TS3 = 0  
TS4 = 0  
TS5 = 0  
TS6 = 0  
TS7 = 0  
TS8 = 0  
TS9 = 0  
TS10 = 0  
TS11 = 0  
TS24 = 0  
TS25 = 0  
TS26 = 0  
TS27 = 0  
TS28 = 0  
TS29 = 0  
TS30 = 0  
TS31 = 0  
Timeslot Assignments  
0. Idle  
1.-31. G.703 Service 1-31  
32. G.704 Frame  
A. Apply New Map  
U. Undo New Map  
G. Full G.703 Service  
N. Full Nx64K Service  
Tab. Select SHDSL or G.703 Timeslots  
Arrow Keys. Move Cursor  
33. Nx64K Service  
G.704 Framing = Unframed  
Figure 10. Full Nx64k 2 Mbps Service  
NT (STU-R)  
LT (STU-C)  
X.21,  
V.35 or  
V.36  
X.21,  
V.35 or  
V.36  
SHDSL NTU  
SHDSL NTU  
SHDSL  
Line  
Nx64k  
Subscriber  
Nx64k  
Nx64k  
Nx64k  
Subscriber  
SHDSL  
SHDSL  
E1  
E1  
E1  
G.703  
G.704  
E1  
G.703  
G.704  
E1  
E1  
Local  
Management  
Port  
Subscriber  
Subscriber  
VT100  
Terminal  
Figure 11. Back-to-Back NTU Operation  
12  
61225101L1-5B  
 
Bit Error Rate Test  
Total Elapsed Time – Total time that has elapsed  
since the test began (Days: Hours: Minutes: Seconds).  
The SHDSL NTU contains a built-in Bit Error Rate  
Test (BERT). The BERT involves injecting and  
detecting a Pseudorandom Binary Sequence (PRBS)  
toward the network on the selected payload (i.e.  
G.703, Nx64, or entire SHDSL payload). The PRBS  
used in the SHDSL NTU is PRS15 as defined in  
ITU-T O.150 and O.151. It is also known as a 2e-15  
pattern.  
A BERT status field supplies the following  
information:  
On – The BERT has started and has pattern sync.  
Searching for pattern – The BERT has lost pattern  
sync.  
Off – This BERT is currently off.  
The BERT is only accessible via the VT100 terminal  
screens. Select 4. Test” from the Main Menu  
Screen. From the Test Screen, the SHDSL BERT,  
G.703 BERT, and Nx64k BERT options will appear,  
and each has one of the following status messages:  
Loopbacks  
There are five types of local loopbacks and five types  
of remote loopbacks available for each of the three  
line interfaces (V.35, G.703, and SHDSL). When  
initiating a loopback, the first step is choosing a line  
interface. When V.35 is chosen, the loopback will  
occur at the V.35 drivers and receivers. When G.703  
is chosen, the loopback will occur at the G.703 drivers  
and receivers. When SHDSL is chosen, the loopback  
will occur at the SHDSL drivers and receivers.  
N/A – This BERT is currently unavailable. Only one  
BERT can be active at a time. For example, if  
SHDSL BERT is active, all others will be N/A.  
ACTIVE – This BERT is currently in progress. The  
source column identifies the person who initiated the  
BERT.  
INACTIVE – This BERT is not currently in progress.  
After selecting a BERT type from the Test Screen, the  
BERT Screen will appear, illustrating both BERT  
statistics and commands.  
NOTE  
All remote loopbacks are initiated at the local  
Express 6530 unit.  
If no BERT is currently active, the following list of  
commands will be available:  
Local Dual Sided Loopback – Provides a  
bidirectional loopback at the NTU (Figure 12).  
Start – Starts the BERT on the selected port/service.  
If the BERT is currently active, the following list of  
commands will be available:  
Stop – Stops the BERT in progress.  
Inject a Single Bit Error – Injects one bit error into  
the pattern.  
Figure 12. Local Dual Sided Loopback  
Restart – Clears out all statistics and restarts the  
BERT.  
Remote Dual Sided Loopback – Initiated at the NTU  
and provides bidirectional loopback at the LTU  
(Figure 13).  
In addition to the commands, the following statistical  
information is provided:  
Bit Error Rate – Total number of bit errors divided  
by the total number of bits in the current test interval.  
Bit Error Count – Total number of bit errors in the  
current test interval.  
Pattern Sync Loss Count – Total number of times  
that the BERT has lost pattern sync.  
Figure 13. Remote Dual Sided Loopback  
Errored Seconds – Total number of seconds in which  
at least one bit error has occurred.  
61225101L1-5B  
13  
 
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.  
NTU  
LTU  
NTU  
LTU  
TX Data  
TX Data  
Figure 14. Local Customer Transparent  
Loopback  
Figure 18. Local Network Transparent  
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.  
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  
LTU  
NTU  
LTU  
TX Data  
TX Data  
Figure 19. Remote Network Transparent  
Loopback  
Figure 15. Remote Customer Transparent  
Loopback  
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 Customer Nontransparent Loopback –  
Provides a loopback at the NTU in the customer  
direction (Figure 16). AIS signal is injected into the  
network side.  
NTU  
LTU  
NTU  
LTU  
TX AIS  
TX AIS  
Figure 20. Local Network Nontransparent  
Loopback  
Figure 16. Local Customer Nontransparent  
Loopback  
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.  
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.  
NTU  
LTU  
NTU  
LTU  
TX AIS  
TX AIS  
Figure 17. Remote Customer Nontransparent  
Loopback  
Figure 21. Remote Network Nontransparent  
Loopback  
14  
61225101L1-5B  
 
Loopbacks may be initiated via the VT100 test  
screens, front panel pushbuttons, Nx64K port control  
leads, or by receiving V.54 or PN127 in-band looping  
signals. Not all loopback types are available for all  
ports and port services by all initiating sources. See  
Table 9 for an overview. A key to the symbols  
displayed in Table 9 is available below the Table.  
Table 9. Loopback Overview  
Ports  
Services  
Customer, away  
from SHDSL Port (left)  
Network, toward SHDSL  
Port (right)  
SHDSL Port  
VT100 Test Screens  
Initiating Source  
Nx64k Port  
G.703 Port  
G.704 Service  
Nx64k Service  
VT100 Loopback On  
(Initiates one of five  
loopback types,  
regardless of the  
associated Loopback  
Type Option setting.)*  
AIS  
AIS  
AIS  
AIS  
(Same as  
Nx64k Port)  
AIS  
AIS  
AIS  
AIS  
VT100 Loopback Off  
LL Button On  
(Initiates a Local  
Customer Loopback per  
the selected port Loopback  
Type Option setting)  
Single  
service  
only  
(Same as  
Nx64k Port)  
AIS  
AIS  
AIS  
AIS  
LL Button Off  
RL Button On  
Single  
service  
only  
Sends  
EOC  
Request  
Message  
Sends  
In-Band  
Patterns  
(Initiates a Remote  
Network Loopback per  
the remote unit’s selected  
port Loopback Type  
Option setting)*  
N/A  
(Same as  
Nx64k Port)  
AIS  
AIS  
AIS  
Sends  
In-Band  
Patterns  
Sends  
In-Band  
Patterns  
Sends  
EOC  
Request  
Message  
RL Button Off  
Nx64k Port Control Leads  
C141 LL On  
N/A  
N/A  
N/A  
(Initiates a Local  
Customer Loopback  
per the Nx64k port  
Loopback Type Option  
setting)  
(Same as  
Nx64k Port)  
AIS  
N/A  
N/A  
N/A  
N/A  
N/A  
N/A  
C141 LL Off  
C140 RL On  
Sends  
In-Band  
Patterns  
(Initiates a Remote  
Network Loopback  
per the remote unit  
Nx64k port Loopback  
Type Option setting)*  
(Same as  
Nx64k Port)  
AIS  
C140 RL Off  
N/A  
N/A  
N/A  
In-band Looping Protocol Reception  
N/A  
N/A  
Receive In-band  
Preparatory Signal  
(Applies the loopback  
after detection of  
AIS  
AIS  
in-band V.54 or PN127  
remote looping pattern  
per the associated  
service Loopback  
Type Option setting)  
(Same as  
Nx64k Service)  
Receive In-band  
N/A  
N/A  
Termination Signal  
(Terminates loopback  
after detection of  
in-band V.54 or PN127  
remote looping pattern)  
Key:  
Dual Loop  
Transparent Loop  
Nontransparent Loop  
No Loop  
AIS  
* The reception of in-band loopback patterns and EOC loopback request messages may be ignored or blocked on certain  
SHDSL LTUs installed in Total Access 3000 Systems  
61225101L1-5B  
15  
 
Multiple Services  
When less than 32 time slots are configured on the  
G.703 port, the NTU bases the CRC-4 detection/  
generation on filling the unused time slots with a fixed  
pattern configurable via the management interface.  
This CRC-4 detection/generation is also required for  
multirate (single or simultaneous services) where less  
than 31 G.704 time slots are carried over the SHDSL  
line.  
The NTU supports the configuration of multiple  
services. These services are routed to either the  
G.703/G.704 interface or the Nx64k interface. The  
Nx64k interface supports a single service with  
1 <= N <= 36. The G.703 interface (with G.704  
framing) supports multiple services (often termed  
“Stacked E1”). The G.703 interface without any  
framing supports a single 2048 kBit/s service. (See  
ITU-T G991.2 Annex. E.1-TPS-TC for European  
2048 kbit/s digital Unstructured Leased Line  
(D2048U).)  
NOTE  
All framed services operate in aligned mode.  
The Nx64k service and G.703 service are capable of  
operating simultaneously. The total number of time  
slots must be less than or equal to the maximum  
number of SHDSL time slots (excluding TS0 if  
structured E1 is used). The G.703 interface with  
framing (G.704) runs over SHDSL in aligned mode  
and supports simultaneous services using the Nx64k  
port for the second service. (See ITU-T G991-2  
Annex E.7 - TPS-TC for Aligned European 2048  
kbit/s digital Structured Leased Line (D2048S) and  
Fractional.)  
Operation  
The SHDSL NTU supports multiple rate line  
operation as specified in ITU-T G.991.2. All services  
described in this document operate in multiple rate  
mode, with a corresponding change in maximum  
payload. Unstructured E1 is supported for SHDSL  
rates equal to 32 and with all G.703 time slot  
assignments equal to the same G.703 service value  
(1 to 31).  
The G.703 interface supports operation in the  
following modes that are selectable via the  
management interface:  
The SHDSL NTU supports CRC-4 detection/  
generation toward the SHDSL network (Figure 22).  
The CRC-4 detection/generation can operate in the  
following modes (configurable via the management  
interface):  
1. Framed  
2. Framed pass through  
3. Unframed  
1. CRC-4 detection/generation disabled  
2. CRC-4 detection/generation enabled  
Nx64k Service  
SHDSL Time Slots  
E1 Service  
Figure 22. CRC-4 Detection/Generation  
16  
61225101L1-5B  
 
The NTU provides framing on the E1 port as  
When the NTU is configured for an unframed service  
the only alarm available is LOS. Consequential  
actions can only be undertaken if G.704 framing is  
either delivered by the remote unit or is being  
described in G.704 (sections 2.3 and 5) and G.706  
(section 4) and G.736. In this mode, the data arriving  
at the SHDSL interface need not contain any G.704  
framing and the NTU generates the framing. One or  
more services can be routed into time slots 1-31.  
generated on the NTU. If framing is being generated  
by the LT then the LT is responsible for these actions.  
CRC-4 multiframe may be enabled or disabled. The  
default is disabled. The NTU routes one or more  
services from the SHDSL payload into time slots  
1-31, as well as routing time slot 0. In this mode  
G.704 framing is present in the data arriving on the  
SHDSL interface, and this is passed transparently to  
the G.703 interface.  
While any of the alarm states LOS, AIS, LOF,  
LOMFA and BER are detected, the following  
consequential actions will occur:  
1. The remote alarm indication (bit 3 of the TS0  
B- word) will be set as described in the G.704,  
G.726 and G.706;  
2. The G.703/G.704 alarm LED will be on,  
3. AIS will be transmitted toward the network in all  
corresponding data time slots.  
NOTE  
Not all time slots are necessarily routed between  
the SHDSL and G.703 interface – some may be  
routed from the SHDSL to the Nx64k interface.  
See the CRC-4 Multiframe subsection.  
NOTE  
RAI assertion by the NTU can be disabled (the  
defaultstate)undertheG.703OptionsScreenby  
the Customer RAI generation option.  
The NTU monitors the G.704 framing to detect errors  
(and thus drive the NTU LEDs) and to determine the  
value of the TS0 spare bits. The NTU transfers all  
SHDSL payload time slots transparently through the  
G.703 port without framing or monitoring. In this  
mode the port operates as a 2 Mbit/s G.703 interface  
without any G.704 framing. This implies that the  
whole SHDSL payload comprises a single service.  
When remote alarm indication is detected, the alarm  
condition will be displayed on the front panel.  
The following alarm conditions can be monitored on  
the G.703/G.704 interface (if applicable to the current  
configuration):  
1. AIS (Alarm Indication Signal)  
2. BER (Excessive Bit Error Rate)  
3. LOMFA (Loss of Multi-Frame Alignment)  
4. LOF (Loss of Frame)  
5. LOS (Loss of Signal)  
6. RAI (Remote Alarm Indication)  
7. Slip  
61225101L1-5B  
17  
 
4. SPECIFICATIONS  
Table 10 lists the specifications for the Express 6530  
SHDSL NxNTU.  
Table 10. Express 6530 SHDSL NxNTU Specifications  
Network Interface  
Line Rate:. ............................................................ SHDSL per ITU G.991.2  
Line Code: ............................................................ TC PAM  
Connector: ............................................................ RJ-45  
DSL Timing: ........................................................ Network, Internal, and DTE  
DTE Interface (DIGITAL)  
Bit Rate: ............................................................... 64 kbps to 2.304 Mbps (Nx64 kbps)  
Connectors: .......................................................... CCITT V.35/V.36 (M34 Female Connector) CCITT X.21 (DB15 Female Connector)  
DTE Interface (E1)  
Bit Rate: ............................................................... 2.048 Mbps  
Connector: ............................................................ RJ-45, 120 ohm Balanced Interface  
Framing: ............................................................... G.703 (CCS) CRC-4 (enable/disable) Unframed  
Craft Port  
Bit Rate: ............................................................... 2.4 kbps to 38.4 kbps  
Connector: ............................................................ DB-9, Female, V.28  
Agency Approvals: K.20, K.21, CISPER 22, IEC 950, CE MARK  
Environment  
Operating: ............................................................. 0°C to 50°C (32°F to 122°F)  
Storage: ................................................................ -20°C to 70°C (-4°F to 158°F)  
Relative Humidity: ............................................... Up to 95%, noncondensing  
Physical  
Dimensions:.......................................................... 1.5 in. H, 9.0 in. W, 6.25 in. D (38.1 mm H, 228.6 mm W, 158.75 mm D)  
Weight: ................................................................. 2 lbs.  
Power:................................................................... 90-240 V, 50-60 Hz, 5 W or -48 VDC  
Power Connector:................................................. IEC 60320 C13  
18  
61225101L1-5B  
 
5. WARRANTY AND CUSTOMER SERVICE  
Asia Pacific-Beijing, China  
8610-8857-6415 voice  
ADTRAN will replace or repair this product within  
the warranty period if it does not meet its published  
specifications or fails while in service. Warranty  
information can be found at  
8610-8857-6417 fax  
Asia Pacific-Hong Kong  
852-2824-8283 voice  
USA and Canadian customers can also receive a copy  
of the warranty via ADTRAN’s toll free faxback  
server, 877-457-5007.  
852-2824-8928 fax  
Carrier Networks Warranty - Document 414.  
Enterprise Networks Warranty - Document 901.  
Asia Pacific-Melbourne, Australia  
61-3-9658-0500 voice  
61-3-9658-0599 fax  
Contact Customer and Product Service (CAPS) prior  
to returning equipment to ADTRAN.  
Europe / Middle East / Africa  
49-6172-483-2304 voice Germany  
256-963-8695 voice - USA  
For service, CAPS requests, or further information,  
contact one of the following numbers:  
International Customer and Product Service  
Contact Numbers  
49-6172-483-2305 fax  
ADTRAN, Inc.  
Latin America / Caribbean  
954-474-4424 voice - USA  
256-963-8695 voice - USA  
Attention: International Department  
901 Explorer Boulevard  
Huntsville, Alabama 35806  
USA  
954-474-1298 fax - USA  
Mexico  
954-474-4424 voice - USA  
U.S. Headquarters  
256-963-8695 voice - USA  
256-963-8000 voice  
800-923-8726 voice  
954-474-1298 fax  
- USA  
256-963-6300 fax  
256-963-8200 fax back  
61225101L1-5B  
19  
 
20  
61225101L1-5B  
 

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