ADTRAN 6530 User Manual

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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 across-connectmap configured for Framed Full E1 Service.

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 across-connectmap configured for Unframed Full E1 Service.

Circuit ID:

 

 

 

 

 

01-Jan-00

23:36:38

Unit Mode:

NT

Provisioning Type: Local

 

 

 

 

 

 

 

Cross-ConnectMap

 

 

 

 

 

 

 

SHDSL Timeslots

 

 

G.703 Timeslots

 

 

TS0

=

32

TS12 = 1

TS24 = 1

TS0

= 32

TS12 = 1

TS24

= 1

TS1

=

1

TS13 = 1

TS25 = 1

TS1

= 1

TS13 = 1

TS25

= 1

TS2

=

1

TS14 = 1

TS26 = 1

TS2

= 1

TS14 = 1

TS26

= 1

TS3

=

1

TS15 = 1

TS27 = 1

TS3

= 1

TS15 = 1

TS27

= 1

TS4

=

1

TS16 = 1

TS28 = 1

TS4

= 1

TS16 = 1

TS28

= 1

TS5

=

1

TS17 = 1

TS29 = 1

TS5

= 1

TS17 = 1

TS29

= 1

TS6

=

1

TS18 = 1

TS30 = 1

TS6

= 1

TS18 = 1

TS30

= 1

TS7

=

1

TS19 = 1

TS31 = 1

TS7

= 1

TS19 = 1

TS31

= 1

TS8

=

1

TS20 = 1

TS32 = N/A

TS8

= 1

TS20 = 1

 

 

TS9

=

1

TS21 = 1

TS33 = N/A

TS9

= 1

TS21 = 1

 

 

TS10 =

1

TS22 = 1

TS34 = N/A

TS10 = 1

TS22 = 1

 

 

TS11 =

1

TS23 = 1

TS35 = N/A

TS11 = 1

TS23 = 1

 

 

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 = N/A

 

 

 

 

 

 

 

 

 

 

 

 

Figure 8. Framed Full E1 Service

 

 

 

 

 

 

 

 

 

 

 

 

 

Circuit

ID:

 

 

 

 

 

 

 

 

01-Jan-0023:40:07

Unit Mode:

NT

Provisioning Type: Local

 

 

 

 

 

 

Cross-ConnectMap

 

 

 

 

 

 

 

SHDSL Timeslots

 

 

 

 

G.703 Timeslots

 

TS0

= 1

TS12 = 1

TS24

= 1

 

TS0

=

1

TS12 = 1

TS24 = 1

TS1

= 1

TS13 = 1

TS25

= 1

 

TS1

=

1

TS13 = 1

TS25 = 1

TS2

= 1

TS14 = 1

TS26

= 1

 

TS2

=

1

TS14 = 1

TS26 = 1

TS3

= 1

TS15 = 1

TS27

= 1

 

TS3

=

1

TS15 = 1

TS27 = 1

TS4

= 1

TS16 = 1

TS28

= 1

 

TS4

=

1

TS16 = 1

TS28 = 1

TS5

= 1

TS17 = 1

TS29

= 1

 

TS5

=

1

TS17 = 1

TS29 = 1

TS6

= 1

TS18 = 1

TS30

= 1

 

TS6

=

1

TS18 = 1

TS30 = 1

TS7

= 1

TS19 = 1

TS31

= 1

 

TS7

=

1

TS19 = 1

TS31 = 1

TS8

= 1

TS20 = 1

TS32

= N/A

 

TS8

=

1

TS20 = 1

 

TS9

= 1

TS21 = 1

TS33

= N/A

 

TS9

=

1

TS21 = 1

 

TS10 = 1

TS22 = 1

TS34

= N/A

 

TS10

=

1

TS22 = 1

 

TS11 = 1

TS23 = 1

TS35

= N/A

 

TS11

=

1

TS23 = 1

 

 

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 9. Unframed Full E1 Service

61225001L1-5D

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 across-connectmap 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-BackNTU Operation

The NTU supports back-to-backoperation

(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-CandSTU-Rmodes are selected via the local management port only. The default mode for the NxNTU isSTU-R.

NOTE

For the LT (STU-C),Network and Customer direction are opposite of ITU G.991.2 specification definitions. In aback-to-backconfiguration, 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-ConnectMap

 

 

 

 

 

 

 

 

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-BackNTU Operation

12

61225001L1-5D

Bit Error Rate Test

The SHDSL NTU contains a built-inBit 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 inITU-TO.150 and O.151. It is also known as a2e-15pattern.

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: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.

If no BERT is currently active, the following list of commands will be available:

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.

Restart – Clears out all statistics and restarts the BERT.

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.

Errored Seconds – Total number of seconds in which at least one bit error has occurred.

Total Elapsed Time – Total time that has elapsed since the test began (Days: Hours: Minutes: Seconds).

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.

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.

NOTE

All remote loopbacks are initiated at the local Express 6530 unit.

Local Dual Sided Loopback – Provides a bidirectional loopback at the NTU (Figure 12).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NTU

 

LTU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 12. Local Dual Sided Loopback

Remote Dual Sided Loopback – Initiated at the NTU and provides bidirectional loopback at the LTU (Figure 13).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NTU

 

LTU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 13. Remote Dual Sided Loopback

61225001L1-5D

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.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NTU

Tx Data

LTU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

LTU

Tx Data

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.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NTU

Tx AIS

LTU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 16. Local Customer Nontransparent

Loopback

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

Tx AIS

Figure 17. Remote Customer Nontransparent

Loopback

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

Tx Data

 

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.

NTU

LTU

Tx Data

 

 

Figure 19. Remote Network 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.

NTU

LTU

Tx AIS

 

Figure 20. Local Network 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.

NTU

LTU

Tx AIS

 

 

Figure 21. Remote Network Nontransparent

Loopback

14

61225001L1-5D

Loopbacks may be initiated via the VT100 test screens, front panel pushbuttons, Nx64K port control leads, or by receiving V.54 or PN127 in-bandlooping 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 the Table 9 is available below the Table.

Table 9. Loopback Overview

 

Ports

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Customer, away

 

 

 

 

 

Network, toward SHDSL

Services

 

Initiating Source

from SHDSL Port (left)

Port (right)

 

 

 

 

 

 

Nx64K Port

G.703 Port

SHDSL Port

G.704 Service

Nx64K Service

 

 

 

 

 

 

 

 

VT100 Test Screens

 

 

 

 

 

 

VT100 Loopback On

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Initiates one of five

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

loopback types,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

regardless of the

 

 

 

AIS

 

 

AIS

 

 

 

AIS

 

 

AIS

(Same as

associated Loopback

 

 

 

 

 

 

 

 

 

 

Type Option setting.)*

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nx64K Port)

 

 

AIS

AIS

 

AIS

AIS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VT100 Loopback Off

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LL Button On

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Single

 

(Initiates a Local

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

service

 

Customer Loopback per

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

only

(Same as

the selected port Loopback

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Type Option setting)

 

 

AIS

 

 

AIS

 

 

 

AIS

 

AIS

Nx64K Port)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LL Button Off

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RL Button On

 

 

 

 

Sends

 

 

 

 

 

 

 

 

 

 

Sends

 

 

 

 

Single

 

(Initiates a Remote

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

service

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EOC

 

 

 

 

 

Network Loopback per

 

 

 

 

In-Band

 

 

N/A

 

 

 

 

 

 

 

 

 

only

 

 

 

 

 

 

 

 

 

 

 

 

Request

 

 

 

 

(Same as

the remote unit’s selected

 

 

 

 

Patterns

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Message

 

 

 

 

 

port Loopback Type

 

 

AIS

 

 

 

 

 

 

 

 

 

 

 

AIS

Nx64K Port)

 

 

 

 

 

 

 

 

 

 

AIS

 

Option setting)*

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RL Button Off

 

 

 

 

Sends

 

 

 

 

 

 

 

 

 

 

Sends

 

 

 

 

Sends

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

In-Band

 

 

 

 

 

 

 

 

 

 

EOC

 

 

 

 

In-Band

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Patterns

 

 

 

 

 

 

 

 

 

 

Request

 

 

 

 

Patterns

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Message

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nx64K Port Control Leads

 

 

 

 

 

 

C141 LL On

 

 

 

 

 

N/A

 

N/A

N/A

 

(Initiates a Local

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Customer Loopback

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Same as

per the Nx64K port

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Loopback Type Option

 

 

AIS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nx64K Port)

setting)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C141 LL Off

 

 

 

 

 

N/A

 

N/A

N/A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C140 RL On

 

 

 

 

Sends

N/A

 

N/A

N/A

 

(Initiates a Remote

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Network Loopback

 

 

 

 

In-Band

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Same as

per the remote unit

 

 

 

 

Patterns

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nx64K port Loopback

 

 

AIS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nx64K Port)

Type Option setting)*

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C140 RL Off

 

 

 

 

 

N/A

 

N/A

N/A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

In-bandLooping Protocol Reception

Receive In-bandPreparatory Signal

(Applies the loopback after detection of in-bandV.54 or PN127 remote looping pattern per the associated service Loopback Type Option setting)

Receive In-bandTermination Signal

(Terminates loopback after detection of in-bandV.54 or PN127 remote looping pattern)

N/A N/A

AIS

AIS

(Same as

Nx64K Service)

N/A N/A

Key:

Dual Loop

Transparent Loop

AIS Nontransparent Loop

 

 

 

No Loop

 

 

 

 

 

*The reception of in-bandloopback patterns and EOC loopback request messages may be ignored or blocked on certain SHDSL LTUs installed in Total Access 3000 Systems

61225001L1-5D

15

Multiple Services

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-TG991.2 Annex.E.1-TPS-TCfor European 2048 kbit/s digital Unstructured Leased Line (D2048U).)

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-TG991-2Annex E.7 -TPS-TCfor Aligned European 2048 kbit/s digital Structured Leased Line (D2048S) and Fractional.)

The SHDSL NTU supports CRC-4detection/ generation toward the SHDSL network (Figure 22). TheCRC-4detection/generation can operate in the following modes (configurable via the management interface):

1.CRC-4detection/generation disabled

2.CRC-4detection/generation enabled

When less than 32 time slots are configured on the G.703 port, the NTU bases the CRC-4detection/ generation on filling the unused time slots with a fixed pattern configurable via the management interface. ThisCRC-4detection/generation is also required formulti-rate(single or simultaneous services) where less than 31 G.704 time slots are carried over the SHDSL line.

NOTE

All framed services operate in aligned mode.

Operation

The SHDSL NTU supports multiple rate line operation as specified in ITU-TG.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:

1.Framed

2.Framed pass through

3.Unframed

Nx64K Service

SHDSL Time Slots

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nx64K Service (10x64K)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TS0

TS1

TS2

TS3

TS4

TS5

TS6

TS7

TS8

TS9

TS10

TS11

TS12

TS13

TS14

TS15

TS16

TS17

TS18

TS19

TS20

TS21

TS22

TS23

TS24

 

TS25

TS26

TS27

TS28

TS29

TS30

TS31

TS32

TS33

TS34

TS35

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E1 Service (12x64)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E1 Service

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace Nx64K Service TSs

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

with an EOC defined pattern

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

for CRC-4calculations.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TS0

TS1

TS2

TS3

TS4

TS5

TS6

TS7

TS8

TS9

TS10

TS11

TS12

TS13

TS14

TS15

TS16

TS17

TS18

TS19

TS20

TS21

TS22

TS23

TS24

 

TS25

TS26

TS27

TS28

TS29

TS30

TS31

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CRC-4Calculation

Figure 22. CRC-4Detection/Generation

16

61225001L1-5D

The NTU provides framing on the E1 port as 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.

CRC-4multiframe may be enabled or disabled. The default is disabled. The NTU routes one or more services from the SHDSL payload into time slots1-31,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.

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.

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.

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-FrameAlignment)

4.LOF (Loss of Frame)

5.LOS (Loss of Signal)

6.RAI (Remote Alarm Indication)

7.Slip

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 generated on the NTU. If framing is being generated by the LT then the LT is responsible for these actions.

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

RAI assertion by the NTU can be disabled (the default state) under the G.703 Options Screen by the Customer RAI generation option.

When remote alarm indication is detected, the alarm condition will be displayed on the front panel.

61225001L1-5D

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, 300386-2

Environment

 

Operating: .............................................................

0°C to 50°C (32°F to 122°F)

Storage: ................................................................

-20°Cto 70°C(-4°Fto 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: ...................................................................

90-240V,50-60Hz, 5 W or-48VDC

Power Connector: .................................................

IEC 60320 C13

 

 

18

61225001L1-5D

5. WARRANTY AND CUSTOMER SERVICE

ADTRAN will replace or repair this product within five (5) years from the date of shipment if it does not meet its published specifications or fails while in service. Refer to ADTRAN International Equipment Warranty, Document:60000003#I-3.

Contact Customer and Product Service (CAPS) prior to returning equipment to ADTRAN.

For service, CAPS requests, or further information, contact one of the following numbers:

International Customer and Product Service

Contact Numbers

ADTRAN, Inc.

Attention: International Department 901 Explorer Boulevard Huntsville, Alabama 35806

USA www.adtran.com

U.S. Headquarters

256 963-8000voice

256 963-6300fax

256 963-8200fax back international@adtran.com

Asia Pacific - Hong Kong

852 2824-8283voice

852 2824-8928fax sales.asia@adtran.com

Asia Pacific - Melbourne, Australia

613 9658 0500 voice

613 9658 0599 fax sales.australia@adtran.com

Asia Pacific - Beijing, China

8610 8857 6415 voice

8610 8857 6417 fax sales.china@adtran.com

Canada - Ontario

416 290-0585voice

416 296-1259fax sales.ontario@adtran.com

Canada - Quebec

877 923-8726toll free

514 940-2888voice

514 940-2890fax sales.quebec@adtran.com

Canada - Other Provinces

877 923-8726toll free sales.canada@adtran.com

Europe - Germany

49 6007 930 203 voice

49 6007 930 204 fax

256 963-8695(USA) sales.europe@adtran.com

Latin America/Caribbean

954 474-4424(USA) voice

954 474-1298fax sales.latin@adtran.com

Mexico

954 474-4424(USA) voice

954 577-0358fax sales.mexico@adtran.com

61225001L1-5D

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61225001L1-5D