ADTRAN T200 H4TU-R User Manual

X

HDSL4 T200 H4TU-R

Installation and Maintenance Practice

CONTENTS

1. General...................................................................................... 1

2. Installation ................................................................................ 2

3. Connections .............................................................................. 5

4. HDSL4 System Testing ............................................................ 5

5. Front Panel Operation ............................................................... 7

6. Control Port Operation.............................................................. 7

7. HDSL4 Deployment Guidelines ............................................. 18

8. Maintenance............................................................................ 23

9. Specifications.......................................................................... 23

10. Warranty and Customer Service ............................................. 23

Appendix A. HDSL4 Loopbacks.............................................. A-1

TABLES

Table 1. ADTRAN Unit Compatability........................................ 1

Table 2. H2TU-R Enclosure Compatibility .................................. 2

Table 3. Compliance Codes .......................................................... 2

Table 4. Front Panel Indicators ..................................................... 3

Table 5. Provisioning Options ...................................................... 4

Table 6. Attenuation limits ......................................................... 18

Table 7. Range Limits: 26 Gauge / 70°F / PIC .......................... 18

Table 8. Range Limits: 24 Gauge / 70°F / PIC .......................... 18

Table 9. Single Pair DC Resistance Value.................................. 19

Table 10. HDSL4 Insertion Loss Values ...................................... 22

Table 11. Single Span and First Segment of Repeatered Loop .... 22

Table 12. Second or Third Segment of Repeatered Loop............. 22

Table 13. Troubleshooting Guide ................................................. 23

Table 14. HDSL4 T200 H4TU-R Specifications.......................... 24

Table A-1. HDSL4 Loopback Control Codes............................ A-2

Table A-2. Loopback Control Codes......................................... A-3

Section 61223424L2-5A

Issue 1, December 2003

CLEI Code: T1L497PC_ _

1223424L2

LOCAL

DSL 1
DSL 2

DS1

ALM

SF

ESF/

(YEL)

(GRN)

B8ZS

/

AMI

(GRN)

(YEL)

LLB

/

RLB

(GRN)

(YEL)

LOC

LBK

REM

TX

TX

M
O
N

RX

R

R
S
2
3
2

1. GENERAL

Figure 1. ADTRAN HDSL4 T200 H4TU-R

The ADTRAN 4-wire T200 HDSL4 transceiver unit for
the remote end (H4TU-R), P/N 1223424L2, is a
network terminating unit used to deploy an HDSL4 T1
circuit using 4-wire metallic facilities. See Figure 1.

This version of the H4TU-R works with multiple list
versions of the HDSL4 transceiver unit for the central

Table 1. ADTRAN Unit Compatability

Unit Number Description

122x401L1 or L2 220 H4TU-C

office (H4TU-C) and repeater (H4R) as listed in

Tab l e 1 .

122x403L1 or L2 DDM+ H4TU-C

122x404L1 or L2 3192 H4TU-R

Revision History

This is the initial release of this document. Future
revisions to this document will be explained in this
subsection.

61223424L2-5A 1

Trademarks: Any brand names and product names included in this document are

trademarks, registered trademarks, or trade names of their respective holders.

118141xL1 Total Access H4TU-C

122x441L1 T200 H4R

122x445L1 239 H4R

NOTE: x = any generic release number

Description

The T200 H4TU-R can be deployed in circuits using
one H4TU-C, one H4TU-R, and up to two H4Rs.

The T200 H4TU-R terminates local loop HDSL4
signals originating from the Central Office (CO) unit
and transforms the HDSL4 signal into traditional DS1
signals to be delivered to the customer.

Compliance

Tab l e 3 shows the compliance codes for the T200

H4TU-R. This product is intended for installation in
equipment with a Type “B” or “E” enclosure.

This product meets all requirements of Bellcore GR­1089-CORE (Class A2), ANSI T1.418-2002 and is
NRTL listed to the applicable UL standards.

The T200 H4TU-R can be used with any H4TU-C to
complete an HDSL4 circuit with up to two H4Rs. Local
power is provided through the enclosure.

NOTE

This unit is intended for Local Power Only. If
a span powered unit is needed, refer to P/N
122x426L2.

The H4TU-R is a T200 mechanics card which will fit
Type 200 or Type 400 mechanics enclosures, as listed
in Tab l e 2 . This table also provides reference infor­mation on the ADTRAN enclosures.

Table 2. H4TU-R Enclosure Compatibility

Part
Number

1242007Lx HR12 Metal

1242008L1 HR4 Installation/

1242034L2 T400 Single Mount

1242034L3 T400 Single-Mount

1245034L1

Description

Enclosure Remote
Shelf

Maintenance

(removable RJ-48
jacks)

High Voltage
Enclosure

2

T200 Dual-Mount
Installation/
Maintenance

1

Document
Number

61242007LX-5x

61242008L1-5

61242034L2-5

61242034L3-5

61245034L1-5

Table 3. Compliance Codes

Code Input Output

Power Code (PC) C C

Telecommunication Code (TC) X X

Installation Code (IC) A –

2. INSTALLATION

After unpacking the unit, inspect it for damage. If
damage is discovered, file a claim with the carrier, then
contact ADTRAN. Refer to the Warranty and Customer

Service section in this practice. The settings on the

H4TU-C are encoded and transmitted to the T200
H4TU-R once the circuit has achieved synchronization.
There are no switch settings on the T200 H4TU-R.

To install the T200 H4TU-R, perform the following
steps:

1. If present, remove the Access Module Blank from
the appropriate access module slot of the
enclosure.

2. Hold the T200 H4TU-R by the front panel while
supporting the bottom edge of the module.

3. Align the module edges to fit in the lower and
upper guide grooves for the module slot.

4. Slide the module into the slot. Simultaneous thumb
pressure at the top and at the bottom of the module
will ensure that the module is firmly seated against
the backplane of the enclosure.

WARNING

1 In all applications the H4TU-R must be installed in NEBS

compliant and UL listed enclosures to insure full compli­ance with this unit.

2 ADTRAN’s T200 Dual-Mount housing (P/N 1245034L1)

is required when using the T200 H4TU-R for HDSL Loop
Support System (H-LSS

2 Issue 1, December 2003 61223424L2-5A

TM

) protection circuits.

Up to –200 VDC may be present on telecom­munications wiring. Ensure chassis ground is
properly connected.

Front Panel LED Indicators

X

There are seven front panel mounted status LED
indicators. Each indicator is described in Tab l e 4 .

Table 4. Front Panel LED Indicators

Front Panel Name Indication Description

1223424L2

LOCAL

DSL 1
DSL 2

DS1

ALM

ESF/

(YEL)

B8ZS

(YEL)

LLB

(YEL)

LOC

REM

TX

M
O
N

RX

R
S
2
3
2

SF

(GRN)

/

(GRN)

/

(GRN)

LBK

AMI

RLB

TX

R

DSL 1

DSL 2

DS1

ALM

ESF/SF

B8ZS/AMI

LLB/RLB

Green

DSL Loop 1 sync, no errors currently detected, and signal margin ≥3dB

Red No DSL Loop 1 sync, errors being detected, or signal margin <3dB

Green

DSL Loop 2 sync, no errors currently detected, and signal margin ≥3dB

Red No DSL Loop 2 sync, errors being detected, or signal margin <3dB

Green DS1 signal is present and no errors currently being detected

Red No DS1 signal or signal is present with errors

OFF No active alarm present

Red Loss of DS1 signal to the unit

Yellow Loss of DSX-1 signal to the H4TU-C

OFF Unit is provisioned for UNFRAMED data

Yellow Unit is provisioned for ESF data

Green Unit is provisioned for SF data

Yellow Unit is provisioned for B8ZS coded data

Green Unit is provisioned for AMI data

OFF Unit is NOT in loopback

Yellow Unit is in loopback (network and/or customer)

Green H4TU-C is in loopback toward this unit

61223424L2-5A Issue 1, December 2003 3

Remote Provisioning

There are no configuration switches for the T200
H4TU-R. Configuration is performed via software
discussed in the Control Port Operation section of this

The provisioning settings can be viewed and manipu­lated through management access via the front panel
RS-232 port. Tab l e 5 lists the available provisioning
options and their factory default settings.

practice.

Table 5. Provisioning Options

Provisioning Option Option Settings Default Settings

1. DSX-1 Line Build Out 0-133 ft., 133-266 ft., 266-399 ft.,

0 to 133 ft.

399-533 ft., 533-655 ft.

2. DSX-1/DS1 Line Code B8ZS, AMI B8ZS

3. DSX-1/DS1 Framing SF, ESF, Unframed, Auto ESF

4. Force Frame Conversion

1

Disabled, Enabled Disabled

5. Smartjack Loopback Disabled, Enabled Enabled

6. Loopback Time Out None, 120 Min 120 Minutes

7. Latching Loopback Mode

2

T1 (Disabled), FT1 (Enabled) T1 (Disabled)

8. DS1 Tx Level 0 dB, -7.5 dB, -15 dB 0 dB

9. Customer Loss Indicator

3

AIS, Loopback, AIS/CI AIS/CI

11. Performance Reporting Messages None, SPRM, NPRM, AUTO (both) AUTO

12. Loop Attenuation Alarm Threshold 0 (Disabled), 1-99 dB 34 dB

13. SNR Margin Alarm Threshold 0 (Disabled), 1-15 dB 04 dB

14. Remote Provisioning Disabled, Enabled Enabled

1

The forced frame format conversion (FFFC) mode sets the H2TU-C to ESF and the H2TU-R to SF. This mode should be used to force

SF (DS1 from customer) to ESF (DSX-1 to network) conversion in the absence of network-provided ESF framing.

2

Latching Loopback Mode

• T1 — When optioned for T1 mode, the unit does not respond to DDS Latching Loopback codes.

• FT1 — DDS Latching Loopback operation is supported. The H4TU-C and any H4R units which are in the HDSL circuit are treated
as identical Tandem Data ports and the HTU-R is treated as a different Tandem Data port.

NOTE: When operating in FT1 mode and during periods of T1 loss of signal, LOS, or T1 AIS from the customer CI, the HDSL
system will send in the network direction from the HTU-C a Fractional DS1 idle signal consisting of a repeating 7E (HEX) byte
payload within a framed/unframed T1 signal. In addition, when optioned for FT1 mode, the setting for Customer Loss Response is
ignored.

3

Customer Loss Indicator

• AIS — Send AIS to network upon T1 loss of signal or T1 AIS from customer.

• LPBK — HTU-R initiates a network loopback upon T1 loss of signal or T1 AIS from customer.

• AIS/CI — HTU-R sends customer disconnect indication upon loss of signal, loss of synchronization, or receipt of T1 AIS from
customer.

NOTE: The CI is generated by transmitting the framing received from the network while overwriting the payload with a repeating
pattern. For applications where the DS1 is Extended Superframe, the data link is overwritten with a Yellow Alarm that is interrupted
once every second by a 100 milli-second code burst of 7E (HEX).

4 Issue 1, December 2003 61223424L2-5A

3. CONNECTIONS

Chassis Ground

All connections of the T200 H4TU-R are made through
card edge connectors. Figure 2 gives the card edge pin
assignments for the T200 H4TU-R circuit pack.

1
2
3
4

DS1 TX Tip

5
6

HDSL4 Tip Loop 1

7
8
9

10

Chassis Ground

11
12

HDSL4 Ring Loop 1

13
14

DS1 TX Ring

15
16

–24 V/-48 V Return

17
18
19
20
21
22
23
24
25
26

Chassis Ground

27
28
29
30
31
32
33
34

–24 VDC/-48 VDC

35
36
37
38
39
40

HDSL4 Tip Loop 2

41
42
43
44
45
46

HDSL4 Ring Loop 2

47
48

DS1 RX Ring

49
50
51
52
53
54

DS1 RX Tip

55

4. HDSL4 SYSTEM TESTING

The T200 H4TU-R provides diagnostic, loopback, and
signal monitoring capabilities.

The seven front panel LEDs provide diagnostics for
HDSL4 loops, DS1 signals, alarms, provisioning, and
loopbacks. Refer to the Installation section for details.

The H4TU-R provides a bidirectional loopback via the
loopback button on the front panel. Refer to the

H4TU-R Network Loopbacks and Customer Loopbacks

sections for more details.

DS1 MON Bantam Jacks

The MON jack provides a non intrusive access point for
monitoring the characteristics of the transmit and
receive signals at the DS1 interface point.

For example, the DS1 MON jack on the H4TU-R could
be used to connect to a bit error rate tester to monitor for
synchronization, test patterns, etc.

Figure 3 is an illustration of specific jack detail.

NOTE

For the MON jacks, the TX and RX indications
relate to the direction of the signal to/from the
CPE.

H4TU-R

T
R

TX

RX

DS1

MON

CPE
DS1

INTERFACE

T1
R1

Figure 3. H4TU-R MON Diagram

Figure 2. H4TU-R Edge Connector Wiring

CAUTION

Ensure chassis ground is properly connected
for either standalone or shelf-mounted applica­tions.

61223424L2-5A Issue 1, December 2003 5

H4TU-R Network Loopbacks

D

D

D

D

The loopback position is a logic loopback located
within the H4TU-R internal HDSL4 transceiver. See

Figure 4.

The H4TU-R responds to multiple loopback activation
processes:

• First, manual loopback on the H4TU-R and/or the
H4TU-C unit may be controlled from the front
panel. Refer to the Front Panel Operation section
of this practice for more detail.

H4TU-C Network-Side Loopback

DSX-1

H4TU-C

H4TU-R Network-Side Loopback and/or
H4TU-R NIU Loopback

DSX-1

H4TU-C

LOCAL

LOOP

LOCAL

LOOP

H4TU-R

H4TU-R

AIS

DS1

X

AIS
DS1

X

• Second, loopback activation may be accomplished
using the control port of the H4TU-R.

• Third, the H4TU-R will respond to the industry
standard HDSL loopback codes as designated in the
ANSI document T1E1.4/92. These are described in

Appendix A, HDSL4 Loopbacks.

• Fourth, the H4TU-R responds to T1 Network Inter­face Unit (NIU) loopback codes as described in

H4TU-R Customer-Side Loopback

X

DSX-1

AIS

H4TU-C

H4TU-C Customer-Side Loopback

X

DSX-1

AIS

H4TU-C

LOCAL

LOOP

LOCAL

LOOP

DS1

H4TU-R

DS1

H4TU-R

Bellcore TR-TSY-000312, as follows:

In-Band Codes

Loop up 11000 (2 in 5)
Loop down 11100 (3 in 5)

ESF Codes

Loop up 1111 1111 0100 1000 (FF 48)
Loop down 1111 1111 0010 0100 (FF 24)

H4R Network-Side Loopback

H4TU-C

H4R Customer-Side Loopback

X

DSX-1

H4TU-C H4TU-RH4R

AIS

H4R

H4TU-R

AIS
DS1DSX-1

X

DS1

Receiving the in-band codes for more than five seconds
or the ESF codes four consecutive times will cause the
appropriate loopback action. The ESF codes must be
transmitted in the Facility Data Link (FDL).

NOTE

The NIU loopback option must be enabled

H4R1 Network-Side Loopback

SX-1

H4TU-C H4TU-RH4R1 H4R2

H4R1 Customer-Side Loopback

X

SX-1

H4TU-C H4TU-RH4R1 H4R2

AIS

AIS

DS1

X

DS1

before the H4TU-R can respond to the NIU
loopback.

The H4TU-R will respond to the loopback codes by
activating the NIU loopback from either the disarmed or
armed state. The loop down codes will return the
H4TU-R to the disarmed or de-activated state
depending upon the code utilized.

H4R2 Network-Side Loopback

SX-1

H4TU-C H4TU-RH4R1 H4R2

H4R2 Customer-Side Loopback

X

SX-1

H4TU-C H4TU-RH4R1 H4R2

AIS

X = Signal Inactive

AIS

DS1

X

Customer Loopbacks

In addition to the loopbacks in the direction of the
network, the H4TU-R may also be looped back in the
direction of the customer. The H4TU-C and H4TU-R

DS1

Customer Side Loopbacks are illustrated in Figure 4.

NOTE

Network and customer loopbacks are governed

Figure 4. HDSL4 Loopbacks

by the loopback time out option (Default=120
minutes).

6 Issue 1, December 2003 61223424L2-5A

5. FRONT PANEL OPERATION

)

)

d)

The front panel contains two pushbuttons. These are
labeled

The

LOC and REM.

LOC pushbutton controls a bidirectional loopback

at the H4TU-R. Pressing the button causes a bidirec­tional loopback to occur. If the bidirectional loopback is
active, pressing the button a second time will disable the
loopback.

REM pushbutton controls a bidirectional loopback

The
at the H4TU-C. Pressing the button causes a loopback
toward the H4TU-R and network to occur. If the
loopback is active, pressing the button a second time
will disable the loopback.

6. CONTROL PORT OPERATION

The H4TU-R provides a front panel-mounted DB-9
connector that supplies an RS-232 interface for
connection to a controlling terminal. The pinout of the
DB-9 is illustrated in Figure 5.

1

6
7
8
9

TXD (Transmit Data

2
3

RXD (Receive Data
4
5

SGN (Signal Groun

NOTE

If a personal computer with terminal emulation
capability is being used, be sure to disable any
power-saving programs. Otherwise, communi­cation between the PC and the HDSL4 unit
may be disrupted, resulting in misplaced
characters or screen time outs.

Operation

The screens illustrated in the following section apply to
an HDSL4 circuit deployed with the ADTRAN HDSL4
technology. The circuit includes an H4TU-C, up to two
H4Rs and an H4TU-R. Other configurations are
possible (such as use of another vendor's equipment)
and their displays will vary slightly from those shown in
this section.

A terminal session is initiated by entering multiple
spacebar characters which are used by the H4TU-R to
determine the speed of the terminal. Once the speed has
been determined, an HDSL4

Main Menu is presented as

illustrated in Figure 6.

Figure 5. RS-232 (DB-9) Connector Pinout

The terminal interface operates at data rates from 1.2,

2.4, 4.8, 9.6, and 19.2 kbps. The asynchronous data
format is fixed at 8 data bits, no parity, and 1 stop bit.

61223424L2-5A Issue 1, December 2003 7

This ADTRAN HDSL4 Main Menu provides access to
detailed performance and configuration information.
The OAM&P (Operation, Administration, Mainte­nance, and Provisioning) screens are available as listed
on the

Main Menu (Figure 6). To access a particular

menu item, press the number associated with that item,
and press

ENTER.

Circuit ID: 10/01/03 09:29:45

Adtran HDSL4 Main Menu

1. HDSL4 Unit Information

2. Provisioning

3. Span Status

4. Loopbacks and Test

5. Performance History

6. Scratch Pad, Ckt ID, Time/Date

7. Terminal Modes

8. Alarm History

9. Event History

10. System PM/Screen Report

11. Clear PM and Alarm Histories

12. Troubleshooting

13. Virtual Terminal Control

The HDSL4

Unit Information Screen (Figure 7)

provides detailed product information on each
component in the HDSL4 circuit. This screen also
displays contact information for ADTRAN Technical
Support, Internet site, and address.

Selection:

Figure 6. HDSL4 Main Menu

Circuit ID: 10/01/03 09:29:45
Press ESC to return to previous menu

ADTRAN
901 Explorer Boulevard
Huntsville, Alabama 35806-2807

--------------------- For Information or Technical Support --------------------­ Support Hours ( Normal 7am - 7pm CST, Emergency 7 days x 24 hours )
Phone: [phone] / 888.873.HDSL Fax: [phone] Internet: www.adtran.com

--------------------------------------------------------------------------------

ADTN H4TU-C ADTN H4TU-R
P/N: 1223403L2 P/N: 1223424L2
S/N: 123456789 S/N: 123456789
CLEI: T1L7PODAAA CLEI: T1L497PCAA
Manf: 01/01/2000 Manf: 01/01/2000
Ver: A00 Ver: A01

ADTN H4R1 ADTN H4R2
P/N: 1221445L1 P/N: 1221445L1
S/N: BB50A8343 S/N: BB50A8353
CLEI: T1R5YP3DAA CLEI: T1R5YP3DAA
Manf: 02/12/2002 Manf: 02/12/2002
Ver: A01 Ver: A01

Figure 7. Unit Information Screen

8 Issue 1, December 2003 61223424L2-5A