ADTRAN 220 HDSL4 Instruction Manual

161222401L1-5C
Section 61222401L1-5C
Issue 3, October 2003
CLEI Code: T1L5TWPC_ _
220 HDSL4 Transceiver Unit
for the Central Office
Installation and Maintenance Practice
Trademarks: Any brand names and product names included in this document are
trademarks, registered trademarks, or trade names of their respective holders.
Figure 1. 220 H4TU-C
CONTENTS
1. General .................................................................................................. 1
2. Installation ............................................................................................. 2
3. Connections ........................................................................................... 4
4. HDSL4 System Testing ........................................................................ 5
5. Control Port Operation HDSL4) ......................................................... 6
6. HDSL4 Deployment Guidelines ........................................................ 16
7. Maintenance ....................................................................................... 20
8. Product Specifications ....................................................................... 20
9. Warranty and Customer Service ........................................................ 20
Appendix A. HDSL4 Loopbacks .......................................................... A-1
FIGURES
Figure 1. 220 H4TU-C ........................................................................... 1
Figure 2. H4TU-C Span Powering Diagram ......................................... 5
Figure 3. H4TU-C Bantam Jack Arrangement ...................................... 5
Figure 4. HDSL4 Loopbacks ................................................................. 6
Figure 5. RS-232 DB-9) Pin Assignments ........................................... 6
Figure 6. HDSL4 Main Menu Screen .................................................... 8
Figure 7. Unit Information Screen ......................................................... 8
Figure 8. Provisioning Screen ................................................................ 9
Figure 9. Span Status Screen ................................................................. 9
Figure 10. Detailed Status Screen ......................................................... 10
Figure 11. Loopbacks and Test Commands Screen ............................. 10
Figure 12. 15-Minute H4TU-C DSX-1 Performance Data Screen...... 11
Figure 13. 24-Hour H4TU-C Loop Performance Data Screen ............ 11
Figure 14. Performance Data Definitions – HDSL4 Loop Related
Screen ................................................................................... 12
Figure 15. Performance Data Definitions – DS1 and DSX-1
Path Related Screen ............................................................. 12
Figure 16. Scratch Pad/Circuit ID and Time/Date Screen ................... 13
Figure 17. T1 Alarm History Screen .................................................... 13
Figure 18. HDSL4 Span History Screen .............................................. 14
Figure 19. Event History Screen ........................................................... 14
Figure 20. System PM/Screen Report Screen ...................................... 15
Figure 21. Virtual Terminal Control Screen ....................................... 15
Figure 22. HDSL4 Circuit Segments .................................................... 16
Figure 23. Resistance Budget Span Powering Two Repeaters ............ 17
Figure 24. Resistance Budget Span Powering Two Repeaters
Example) ............................................................................ 18
1. GENERAL
The ADTRAN 220 HDSL4 Transceiver Unit for the
Central Office H4TU-C) ADTRAN P/N
1222401L1) is used to deploy an HDSL4 T1 circuit
using 4-wire metallic facilities. See Figure 1. The
unit occupies one slot in a 220 shelf.
The DS1 or DSX-1 input signal is supplied from the
network. The HDSL4 signals are provided to the
local loop. The ADTRAN 220 H4TU-C works in
conjunction with the ADTRAN H4TU-R and up to
two H4Rs to provide a DS1 service on the local loop.
TABLES
Table 1. Compliance Codes .................................................................. 2
Table 2. Front Panel Indicators ............................................................ 3
Table 3. Provisioning Options .............................................................. 4
Table 4. Screen Abbreviations ............................................................. 7
Table 5. HDSL4 Loop Insertion Loss Values ................................... 16
Table 6. Single Pair Cable DC Resistance Value ............................. 17
Table 7. Qualification Worksheet for Single Span and First Segment .
of Repeatered Loop ............................................................. 19
Table 8. Qualification Worksheet for Second Segment
of Repeatered Loop ............................................................. 19
Table 9. 220 H4TU-C Specifications ................................................ 21
Table A-1. HDSL4 Loopback Control Codes ..................................... A-2
Table A-2. Loopback and Control Codes ......................................... A-3,4
1222401L1
DSL
1
DSL
2
TX
E
Q
RX
TX
M
O
N
R
S
2
3
2
RX
DSX
DSX
/DS1
ALM
LBK
ESF
/SF
H TUC
B8ZS
/AMI

261222401L1-5C
The 220 H4TU-C works with the following list
versions of the HDSL4 unit for the remote end
H4TU-R) and the repeater H4R):
Part Number Description
122x424L1 ............... T200 H4TU-R,Local Power
122x426L1 ............... T200 H4TU-R, Span Power
122x441L1 ............... T200 H4R
122x445L1 ............... 239 H4R
Note: x = any generic number
The 220 H4TU-C can be deployed in circuits
consisting of one H4TU-C, one H4TU-R, and up to
two H4Rs. System power and alarm bus connections
are made through the backplane of the 220 shelf.
The 220 H4TU-C contains an onboard fuse. If the
fuse opens, it supplies a –48 VDC voltage to the fuse
alarm bus and all front panel indicators will be off.
This fuse is not designed to be replaced in the field.
The 220 H4TU-C uses a DC-to-DC converter to derive
its internal logic and span powering voltages from the
–48 VDC office supply. The H4TU-C can span power
an H4TU-R and up to two H4Rs as listed above.
Revision History
This is the third release of this document. This
revision is to update the Screens.
2. INSTALLATION
C A U T I O N
C A U T I O N
!
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
After unpacking the unit, inspect it for damage. If
damage is discovered, file a claim with the carrier, then
contact ADTRAN. For more information, refer to the
Warranty and Customer Service section.
Code Input Output
Power Code (PC) F C
Telecommunication Code (TC) – X
Installation Code (IC) A –
Table 1. Compliance Codes
Compliance
Table 1 lists compliance codes for the 220 H4TU-C.
This product is intended for installation in restricted
access locations only and in equipment with a Type
“B” or “E” enclosure.
WARNING
Up to –200 VDC may be present on
telecommunications wiring. The DSX-1
interface is intended for connection to
intra-building wiring only. Ensure chassis ground
is properly connected.
This product provides span powering voltage
negative only with respect to ground, –190 VDC
nominal, GFI protection < 5 mA) and meets all
requirements of Bellcore GR-1089-CORE Class A2)
and ANSI T1.418-2002. This product is NRTL listed
to the applicable UL standards.
Front Panel Indicators
The 220 H4TU-C has seven front panel LEDs,
illustrated in Table 2, which indicate operational
status.
The 220 H4TU-C plugs directly into the 220 shelf.
No installation wiring is required.
There are no configuration switches for the H4TU-C.
Configuration is performed via software discussed in
Section 5 of this practice.

361222401L1-5C
Table 2. Front Panel Indicators
1222401L1
DSL
1
DSL
2
TX
E
Q
RX
TX
M
O
N
R
S
2
3
2
RX
DSX
DSX
/DS1
ALM
LBK
ESF
/SF
H TUC
B8ZS
/AMI
lebaLnoitidnoCnoitpircseD
2LSD/1LSD neerG
deR
nigramlangisdna,detcetedyltnerrucsrorreon,cnys2pooL/1pooLLSD ≥Bd3
Bd3<nigramlangisro,detcetedgniebsrorre,cnys2pooL/1pooLLSDoN
1SD/XSD neerG
deR
detcetedgniebyltnerrucsrorreondnatneserpsilangis1-XSD
srorrehtiwtneserpsilangisrolangis1-XSDoN
MLA ffO
deR
wolleY
tneserpmralaevitcaoN
tinuehtotlangis1-XSDfossoL
etomerehtotlangis1SDfossoL
FS/FSE ffO
wolleY
neerG
ataddemarfnudetcetedsahtinU
atadFSEdetcetedsahtinU
atadFSdetcetedsahtinU
IMA/SZ8B wolleY
neerG
ataddedocSZ8BdetcetedsahtinU
ataddedocIMAdetcetedsahtinU
KBL ffO
wolleY
kcabpoolnitonsitinU
)remotsucro/dnakrowten(kcabpoolnisitinU
Powering Options
The H4TU-C is default enabled for span powering
mode. The H4TU-C will power one, two, or three
elements and can be set to span power Disabled when
the H4TU-R is locally powered and there are no H4Rs
on the circuit.

461222401L1-5C
Provisioning
Through management access via the front panel
RS-232 port, the provisioning settings can be viewed
and manipulated. Table 3 lists the available
provisioning options and the factory default settings.
Table 3. Provisioning Options
3. CONNECTIONS
The 220 H4TU-C occupies one card slot in a 220
shelf. Power and alarm signals are provided to the
card through the backplane of the shelf. DSX-1 and
HDSL4 loop signals are connected to the mass
termination shelf connectors.
noitpOgninoisivorPsgnitteSnoitpOsgnitteStluafeD
tuOdliuBeniL1-XSD.1 ,.tf335-993,.tf993-662,.tf662-331,.tf331-0
lanretxE,.tf556-335
lanretxE
edoCeniL1SD/1-XSD.2IMA,SZ8BSZ8B
gnimarF1SD/1-XSD.3otuA,demarfnU,FSE,FSFSE
noisrevnoCemarFecroF.4delbanE,delbasiDdelbasiD
kcabpooLkcajtramS.5delbanE,delbasiDdelbanE
tuOemiTkcabpooL.6setuniM021,enoNsetuniM021
edoMkcabpooLgnihctaL.7)delbanE(1TF,)delbasiD(1T)delbasiD(1T
leveLxT1SD.8,Bd0 −,Bd5.7 −Bd51 −Bd5.7
rewoPnapS.9delbasiD,delbanEdelbanE
rotacidnIssoLremotsuC.01IC/SIA,kcabpooL,SIAIC/SIA
segasseMgnitropeRecnamrofreP.11)htoB(OTUA,MRPN,MRPS,enoNOTUA
dlohserhTmralAnoitaunettApooL.21Bd99-1,)delbasiD(0Bd43
dlohserhTmralAnigraMRNS.31Bd51-1,)delbasiD(0Bd40
gninoisivorPetomeR.41delbanE,delbasiDdelbanE

561222401L1-5C
H4TU-C Alarm Outputs
Each H4TU-C has a built-in fuse for the –48 VDC
power feed. A blown fuse indicates the card has
malfunctioned and should be replaced.
4. HDSL4 SYSTEM TESTING
The ADTRAN HDSL4 system provides the ability to
monitor the status and performance of the DSX-1
signals, DS1 signals, and HDSL4 loop signals.
Detailed performance monitoring is provided via
management access of the front panel RS-232 port.
These features are valuable in troubleshooting and
isolating any system level problems that may occur at
installation or during operation of the HDSL4 system.
The following subsections describe additional testing
features.
H4TU-C Bantam Jacks
The front panel of the H4TU-C contains metallic
splitting bantam jacks for both nonintrusive
monitoring) and intrusive terminating) DSX-1 test
access.
H4TU-C Loopbacks
The H4TU-C responds to two different loopback
activation processes.
First, loopbacks may be activated using the craft
interface of the 220 H4TU-C. The Loopbacks and
Test Screen, which provides for the H4TU-C and
H4TU-R loopbacks, is described in Section 5 of this
practice.
Second, the H4TU-C responds to the industry standard
for HDSL4 loopbacks. A detailed description of these
loopback sequences is given in Appendix A.
This unit is transparent to framing. If a framed or
unframed loopback control sequence is sent, then the
unit will initiate the proper loopback command.
Refer to Appendix A, Table A-1.)
The 220 H4TU-C is capable of span powering the
H4TU-R and two H4Rs by applying simplex current
to the local loop. From 30 to 155 mA of loop current
is coupled onto the HDSL4 span to power the
H4TU-R and two H4Rs when deployed. The span
powering voltage is less than –190 volts with GFI
protection to less than 5 mA. See Figure 2.
Figure 2. H4TU-C Span Powering Diagram
TC PAM
HDSL4
SPAN POWER
REGULATOR SPAN CURRENT
T
R
T1
R1
LOOP 1
LOOP 2
Figure 3. H4TU-C Bantam Jack Arrangement
DSX-1
MON
Rx
H4TU-C
DATA
PUMP
LOOP DC
POWER SOURCE
DSX-1
T
R
DSX-1
T1
R1
HDSL4
LOOP 1
HDSL4
LOOP 2
H4TU-C
HDSL4
LOOP 1
HDSL4
LOOP 2
EQ
Rx
DSX-1
MON
Tx
EQ
Tx
Figure 3 illustrates the complete bantam jack
arrangement and details for specific jacks.

661222401L1-5C
The loopback condition imposed in all cases is a logic
level loopback at the point within the H4TU-C where
the DSX-1 signal passes into the HDSL4 modulators.
Figure 4 depicts all of the loopback locations possible
with ADTRAN HDSL4 equipment.
The terminal interface can operate at data rates of 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.
The supported terminal type is VT100 or compatible.
The H4TU-C supports two types of terminal
emulation modes. The manual update mode is a dumb
terminal mode, where the user can use print screen
and log file commands easily. This mode also
includes a “3 SPACES TO UPDATE” message on the
top of the terminal screen pressing the spacebar three
times to update the screen). The real-time update
mode enables all screen highlighting and cursor
placement. Print screen and log file commands are
not available in this mode. The default terminal mode
is real time update mode.
NOTE
Pressing the CTRL T while on any screen to
toggle between manual and real time
terminal modes.
NOTE
Pressing ESC while on any screen to go back to
the previous screen.
In addition to network-side loopbacks, the H4TU-C
provides customer-side loopbacks initiated by using
either the terminal control port or in-band loop codes
see Appendix A). In this mode, an AIS signal is
supplied to the network.
Figure 4. HDSL4 Loopbacks
DSX-1
H4TU-C
LOCAL
LOOP
H4TU-C Network-Side Loopback
H4TU-R
H4TU-C
LOCAL
LOOP
H4TU-R Customer-Side Loopback
H4TU-R
H4TU-C
LOCAL
LOOP
H4TU-C Customer-Side Loopback
H4TU-R
X
X
DS1
DSX-1
DSX-1
DSX-1
H4TU-C
LOCAL
LOOP
H4TU-R Network-Side Loopback and/or
H4TU-R NIU Loopback
H4TU-R
X
DS1
DS1
DS1
X
AIS
AIS
X
H4R Customer-Side Loopback
DS1
AIS
AIS
H4TU-C
H4R Network-Side Loopback
H4TU-R
DS1DSX-1
DSX-1
H4R
AIS
AIS
AIS
X
H4TU-C H4TU-RH4R
H4R1 Network-Side Loopback
DS1DSX-1
H4TU-C H4TU-RH4R1 H4R2
AIS
X
H4R1 Customer-Side Loopback
DS1DSX-1
H4TU-C H4TU-RH4R1 H4R2
X = Signal Inactive
X
AIS
H4R2 Network-Side Loopback
DS1DSX-1
H4TU-C H4TU-RH4R1 H4R2
AIS
X
H4R2 Customer-Side Loopback
DS1DSX-1
H4TU-C H4TU-RH4R1 H4R2
X
5. CONTROL PORT OPERATION (HDSL4)
The 220 H4TU-C provides a front panel 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.
Figure 5. RS-232 (DB-9) Pin Assignments
6
7
8
9
1
2
3
4
5
TXD (Transmit Data)
SGN (Signal Ground)
RXD (Receive Data)

761222401L1-5C
Many portable personal computers use power-saving
programs that are known to interfere with applications
running on the personal computer. If using a portable
personal computer with terminal emulation capability,
communication between the computer and the HDSL4
unit may be periodically disrupted if power saving
programs are being used on the personal computer.
The symptoms may include misplaced characters
appearing on the screen and/or the occurrence of
screen time outs. These symptoms are not disruptive
to the operation of the circuit and are avoidable if the
power saving options are disabled or removed.
Table 4. Screen Abbreviations
Abbreviation
ES .......................
SES .....................
UAS ....................
SF ........................
ESF .....................
B8ZS ...................
AMI ....................
LBO ....................
BPV ....................
NIU .....................
S/N ......................
15M.....................
24H .....................
Definition
Errored Seconds
DSX/DS1
SF ....... Second in which a BPV or frame bit error occurs
ESF ..... Second in which a BPV or CRC error occurs
HDSL4 ...... Second in which a CRC error occurs
Severely Errored Seconds
DSX/DS1
SF ....... Second in which 1544 BPVs or 8 frame bit errors occurs
ESF ..... Second in which 1544 BPVs or 320 CRC errors occur
HDSL4 ...... Second in which 50 CRC errors occurs
Unavailable Seconds
DSX/DS1 .. Second in which there is a loss of signal or sync
HDSL4 ...... Second in which there is a loss of signal or sync
Superframe Format
Extended Superframe Format
Bipolar with 8 Zero Substitution
Alternate Mark Inversion
Line Build Out
Bipolar Violation
DSX/DS1 .. Second in which a bipolar violation occurs
T1 Network Interface Unit
Serial Number
15-minute period
24-hour period
Operation
For abbreviations used in the screen diagrams, see
Table 4.
The screens illustrated in Figure 6 through Figure 21
are for an HDSL4 circuit deployed with ADTRAN’s
HDSL4 technology. The circuit includes an H4TU-C,
up to two H4Rs and an H4TU-R. Other
configurations are possible, and the displays will vary
slightly from those shown in this section.

861222401L1-5C
Figure 7. Unit Information Screen
7. Terminal Modes
8. Alarm History
9. Event History
10. System PM/Screen Report
11. Virtual Terminal Control
The Unit Information screen Figure 7) provides
detailed product information on each component in
the HDSL4 circuit.
From the ADTRAN HDSL4 Main Menu Figure 6),
the following screens can be accessed.
1. HDSL4 Unit Information
2. Provisioning
3. Span Status
4. Loopbacks and Test
5. Performance History
6. Scratch Pad, Ckt ID, Time/Date
Figure 6. HDSL4 Main Menu Screen
CC
CC
Circuit ID: 01/25/02 11:52:00
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: 1222401L1 P/N: 1222426L1
S/N: 123456789 S/N: 123456789
CLEI: T1L5TWPCAA CLEI: T1L5JZTCAAA
Manf: 01/01/2000 Manf: 01/01/2000
Ver: 24 1 A00000 Ver: 27 2 A00000
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: 21 1 A00001 Ver: 21 1 A00001
Circuit ID: 08/08/02 03:29:54
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. Virtual Terminal Control
Selection:

961222401L1-5C
The Provisioning screen Figure 8) displays current
provisioning settings for the HDSL4 circuit. Options
that can be changed from this screen are labeled with
a number for example, “1” for DSX-1 Line Build
Out). To change a particular option setting, select the
appropriate number and a new menu will appear with
a list of the available settings.
The options shown in Table 3 are available with the
H4TU-R P/N1222426L1). Some settings may differ
when using different H4TU-Rs.
The Span Status Screen (Figure 9) provides quick
access to status information for each HDSL4 receiver
in the circuit.
Figure 9. Span Status Screen
Figure 8. Provisioning Screen
CIRCUIT ID:ABC123 01/25/02 11:52:00
Press ESC to return to previous menu
Span Status Screen
______ ______ ______ ______
NET | | | | | | | | CUST
| | | | | | | |
----->| |-------| |-------| |----------------------| |----->
| | | | | | | |
| | | | | | | |
<-----| |-------| |-------| |----------------------| |<-----
| | | | | | | |
DSX-1 |______| |______| |______| |______| DS1
H4TUC H4R 1 H4R 2 H4TUR
1. View Detailed Status
Selection:
Circuit ID: 01/01/00 00:17:30
Press ESC to return to previous menu
Provisioning
1. DSX-1 Line Buildout = EXTERNAL
2. DSX-1/DS1 Line Code = B8ZS
3. DSX-1/DS1 Framing = ESF
4. Forced Frame Conversion = Disabled
5. Smartjack Loopback = Enabled
6. Loopback Timeout = 120 Min
7. Latching Loopback Mode = T1 (Disabled)
8. DS1 TX Level = -7.5 dB
9. Span Power = Enabled
10. Customer Loss Indicator = AIS/CI
11. PRM Setting = AUTO
12. Loop Atten Alarm Thres = 34dB
13. SNR Margin Alarm Thres = 04dB
14. Remote Provisioning = Enabled
Selection:

10 61222401L1-5C
The Detailed Status screen from the Span Status menu
Figure 10) displays the HDSL4 status for each
receiver point.
The Loopbacks and Test Commands screen Figure
11) provides the user with the ability to invoke or
terminate all available HDSL4 loopbacks.
Figure 10. Detailed Status Screen
CIRCUIT ID:ABC123 01/25/02 11:52:00
Press ESC to return to previous menu
Detailed Status Screen
LOOP 1 LOOP 2
MARGIN ATTEN ESTIMATED MARGIN ATTEN ESTIMATED
Interface (CUR/MIN/MAX) (CUR/MAX) INS. LOSS (CUR/MIN/MAX) (CUR/MAX) INS. LOSS
--------- ------------- --------- --------- ------------- --------- ---------
H4TUC 17/00/17 00/00 00 17/00/17 00/00 00
H4R1 NETW 17/00/17 00/00 00 17/13/17 00/00 00
H4R1 CUST 17/17/17 00/00 00 17/00/17 00/00 00
H4R2 NETW 17/00/17 00/00 00 17/13/17 00/00 00
H4R2 CUST 17/17/17 00/00 00 17/00/17 00/00 00
H4TUR 17/00/17 00/00 00 17/00/17 00/00 00
1. Reset Min/Max
2. View Performance History
Selection:
Figure 11. Loopbacks and Test Commands Screen
CIRCUIT ID:ABC123 01/25/02 11:52:00
Press ESC to return to previous menu
Loopbacks and Test Commands
______ ______ ______ ______
NET | | | | | | | | CUST
| | | | | | | |
----->| |-------| |-------| |----------------------| |----->
| | | | | | | |
| | | | | | | |
<-----| |-------| |-------| |----------------------| |<-----
| | | | | | | |
DSX-1 |______| |______| |______| |______| DS1
H4TUC H4R 1 H4R 2 H4TUR
1. Run Self Tests 7. H4R1 Loopup Net
2. H4TU-C Loopup Net 8. H4R1 Loopup Cust
3. H4TU-C Loopup Cust 9. H4R2 Loopup Net
4. H4TU-R Loopup Net 10. H4R2 Loopup Cust
5. H4TU-R Loopup Cust
6. H4TU-R Loopup Bilateral
Selection:
Each HDSL4 circuit component can be looped toward
the network or customer from this screen. Unit self
tests can also be initiated from this screen.

1161222401L1-5C
The Performance History screens (Figure 12 and
Figure 13) are used to select and display the historical
HDSL4 and T1 performance data in several different
registers. At each 15-minute interval, the performance
information is transferred to the 15-minute
performance data register. This unit stores
performance data in 15-minute increments for the last
Figure 12. 15-Minute H4TU-C DSX-1 Performance Data Screen
24-hour period. At each 24-hour interval, the
performance data is transferred into the 24-hour
performance data registers. This unit stores up to 31
days of 24-hour interval data.
Figure 13. 24-Hour H4TU-C Loop Performance Data Screen
CIRCUIT ID:ABC123 01/25/02 11:52:00
Press ESC to return to previous menu
Menu 15 Minute H4TUC DSX-1 Performance Data
1. Definitions ES-L SES-L LOSS-L CV-L
2. Reset Data 000 000 000 00000
3. 15 Min Data 14:15 000 000 000 00000
4. 60 Min Data 14:00 000 000 000 00000
5. 24 Hr Data 13:45 000 000 000 00000
6. Line Data 13:30 000 000 000 00000
7. Path Data 13:15 000 000 000 00000
8. H4TUC DSX-1 13:00 000 000 000 00000
9. H4TUR LOOP 12:45 000 000 000 00000
10. H4TUR LOOP 12:30 000 000 000 00000
11. H4TUR DS1
12. H4R #1 NETW
13. H4R #1 CUST
14. H4R #2 NETW ___ ___ ___ ___
15. H4R #2 CUST | C | |#1 | |#2 | | R |
-8->| |-----| |-----| |---------------| |--->
| |9 12| |13 14| |15 10| |
<---| |-----| |-----| |---------------| |<-11
|___| |___| |___| |___|
Selection:
CIRCUIT ID:ABC123 01/25/02 11:52:00
Press ESC to return to previous menu
Menu 24 Hour H4TUC LOOP Performance Data
LOOP 1 LOOP 2
1. Definitions ES-L SES-L UAS-L ES-L SES-L UAS-L
2. Reset Data 00000 00000 00000 00000 00000 00000
3. 15 Min Data 12/17 ----- ----- ----- ----- ----- -----
4. 60 Min Data 12/16 ----- ----- ----- ----- ----- -----
5. 24 Hr Data 12/15 ----- ----- ----- ----- ----- -----
6. Line Data 12/14 ----- ----- ----- ----- ----- -----
7. Path Data 12/13 ----- ----- ----- ----- ----- -----
8. H4TUC DSX-1 12/12 ----- ----- ----- ----- ----- -----
9. H4TUC LOOP 12/11 ----- ----- ----- ----- ----- -----
10. H4TUR LOOP
11. H4TUR DS1
12. H4R #1 CUST
13. H4R #1 CUS
14. H4R #2 NETW ___ ___ ___ ___
15. H4R #2 CUST | C | |#1 | |#2 | | R |
-8->| |-----| |-----| |---------------| |--->
| |9 12| |13 14| |15 10| |
<---| |-----| |-----| |---------------| |<-11
|___| |___| |___| |___|
Selection:

12 61222401L1-5C
Abbreviations used in the Performance History
screens are defined in Data Definitions screens.
See Figure 14 and Figure 15.)
Figure 14. Performance Data Definitions – HDSL4 Loop Related Screen
Figure 15. Performance Data Definitions – DS1 and DSX-1 Path Related Screen
Circuit ID: 04/17/02 05:06:23
Performance Data Definitions
H4TUC, H4TUR, and H4R LOOP Related: HDSL4 Framing
ES-L Errored Seconds CRC>=1 or LOSW>=1
SES-L Severely Errored Seconds CRC>=50 or LOSW>=1
UAS-L Unavailable Seconds >10 cont. SES-Ls
DS1 and DSX-1 Line Related: Superframe and Extended Superframe
ES-L Errored Seconds (BPV+EXZ)>=1 or LOS>= 1
SES-L Severely Errored Seconds (BPV+EXZ)>=1544 or LOS>=1
LOSS-L Loss of Signal Seconds LOS>= 1
PDVS-L Pulse Density Violation Secs EXZ>=1; >7 zeros if B8ZS, >15 if AMI
B8ZS-L B8ZS Seconds B8ZS coded signal received
CV-L Code Violation Count (BPV+EXZ) count
NOTE: Reverse video indicates invalid data due to a terminal restart (or power
cycle), a data register reset, or a system date or time change.
N. Next
P. Previous Selection:
Circuit ID: 04/17/02 05:07:05
Performance Data Definitions
DS1 and DSX-1 Path Related: Superframe Extended Superframe
ES-P Errored Seconds FE>=1 or CRC>=1 or
SEF>=1 or AIS>=1 SEF>=1 or AIS>=1
SES-P Severely Errored Seconds FE>=8 or CRC>=320 or
SEF>=1 or AIS>=1 SEF>=1 or AIS>=1
UAS-P Unavailable Seconds >10 cont. SES-Ps >10 cont. SES-Ps
SAS-P SEF/AIS Seconds SEF>=1 or AIS>=1 SEF>=1 or AIS>=1
ES-PFE Far End Errored Seconds n/a PRM bits G1-G6,SE,
or SL=1, or RAI
CV-P Code Violation Count FE count CRC error count
NOTE: Under a UAS-P condition, ES-P and SES-P counts are inhibited.
Under a SES-L or SES-P condition, the respective CV-L or CV-P count is
inhibited.
P. Previous Selection:

1361222401L1-5C
Figure 16. Scratch Pad/Circuit ID and Time/Date Screen
Figure 17. T1 Alarm History Screen
Figure 16 illustrates the Scratch Pad, Circuit ID, Time
and Date Screen. The Scratch Pad field has been
designed for use by technicians. The field can be any
alpha-numeric string up to 50 characters in length.
Similarly, the Circuit ID can be any alpha-numeric
string up to 25 characters in length. The time should
be entered using military time for example, enter 3:15
p.m. as “151500”). The date should be entered as
MMDDYY for example, enter January 2, 2000, as
“010200”).
The T1 Alarm History screen and HDSL4 Span
History Screen, Figure 17 and Figure 18 respectively,
provide the user with a detailed alarm history and
events log for the HDSL4 and T1 spans. These
screens include a time, date, first/last occurrence and
count for each type of HDSL4 or T1 alarm. A
historical alarm log is also available in the System
Alarm menu.
CIRCUIT ID:ABC123 01/25/02 11:52:00
Press ESC to return to previous menu
T1 Alarm History
LOCATION ALARM FIRST LAST CURRENT COUNT
--------------------------------------------------------------------------------
H4TU-C RED(LOS/LOF) OK 000
(DSX-1) YELLOW(RAI) OK 000
BLUE(AIS) OK 000
H4TU-R RED(LOS/LOF) OK 000
(DS1) YELLOW(RAI) OK 000
BLUE(AIS) OK 000
--------------------------------------------------------------------------------
1. T1 Alarm 4. Span H4R1 to H4R2
2. System Alarm 5. Span H4R2 to H4TU-R
3. Span H4TUC to H4R1 C. Clear T1 Alarms
Selection:
Circuit ID: 01/01/00 02:07:36
Press ESC to return to previous menu
Current Scratch Pad:
New Scratch Pad =
New Circuit ID =
New Date = / / (MM/DD/YY)
New Time = : : (HH:MM:SS)
Press TAB to skip to next entry field

14 61222401L1-5C
Figure 18. HDSL4 Span History Screen
Figure 19. Event History Screen
CIRCUIT ID:ABC123 01/25/02 11:52:00
Press ESC to return to previous menu
Num Description of Event Date Time
-----------------------------------------------------------------
1. H4TU-C Powered Up 01/25/02 11:52:00
Page Number: 1/ 1 Number of Events: 1
-----------------------------------------------------------------
‘P’ - Previous Page ‘H’ - Home ‘R’ - Reset Events
‘N’ - Next Page ‘E’ - End
Selection:
The Event History screen (Figure 19) provides a log
history of HDSL4 circuit events.
CIRCUIT ID:ABC123 01/25/02 11:52:00
Press ESC to return to previous menu
HDSL4 Span History
LOCATION ALARM FIRST LAST CURRENT COUNT
---------------------------------------------------------------------------------
SPAN C-H1 L1 LOS OK 000
L2 LOS OK 000
H4TU-C L1 MRGN OK 000
L2 MRGN OK 000
H4R1 NET L1 MRGN OK 000
L2 MRGN OK 000
H4TU-C L1 ATTEN OK 000
L2 ATTEN OK 000
H4R1 NET L1 ATTEN OK 000
L2 ATTEN OK 000
---------------------------------------------------------------------------------
1. T1 Alarm 4. Span H4R1 to H4R2
2. System Alarm 5. Span H4R2 to H4TU-R
3. Span H4TUC to H4R1 C. Clear Span Alarms
Selection:

1561222401L1-5C
The System PM/Screen Report option from the Main
Menu offers four types of reports on performance
monitoring. Selecting a report type will then display
all the reports for that category on the screen at once,
which is more efficient than stepping through the
menus individually. See Figure 20.
The Virtual Terminal Control screen Figure 21) is
used to log onto the H4TU unit at the opposite end of
the circuit.
Figure 20. System PM/Screen Report Screen
Figure 21. Virtual Terminal Control Screen
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. Virtual Terminal Control
Selection: 10
Enable data logging now.
Select Report Type or Press Escape to cancel:
1) Full System/History Report
2) Current Status Report
3) System Configuration Report
4) Alarm/Event History
Circuit ID: 05/02/03 11:12:38
Virtual Terminal Session: Inactive
Virtual Host: no
Virtual Terminal Control
1. Log into H4TU-R
Selection: 1

16 61222401L1-5C
6. HDSL4 DEPLOYMENT GUIDELINES
The different segments of an HDSL4 circuit are
defined in Figure 22.
NOTE
Refer to the Detailed Status Screen Main Menu
selection “3,” Span Status selection “1”) for the
current loop SNR Margin, Insertion Loss, and
Attenuation status.
Each of the three segments associated with span
powering two H4Rs and an H4TU-R must satisfy the
recommended insertion loss, loop attenuation
requirements in addition to the DC resistance budgets.
In general, 22 and 19 AWG segments will be
restricted by their loop attenuation while the DC
resistance will restrict the segment reach for 26 and 24
AWG. When designing a dual H4R loop, the first
segment should have lower DC resistance than the
second segment. Single H4R spans do not require any
restriction due to DC resistance.
The segment resistance W segment) is determined
using the equation provided below.
Ωsegment = L26 * Ω26 + L24 * Ω24 + L22 * Ω22 + L19 * Ω19
where : L# is the length of # AWG cable kft,
excluding bridge taps), Ω# is the D.C.
Resistance of # AWG cable
Table 6 list single pair cable DC resistance values to
be used in the equation above.
Once the resistance of each segment is confirmed, see
Figure 23 to decide if the H4TU-C is capable of span
powering two H4Rs and one H4TU-R. Follow these
steps to utilize the graph shown in Figure 22:
1. Find the line on the graph which represents the
known third segment resistance. These are the
lines running diagonally across the graph labeled
300 - 1100 ohms. This line represents the upper
limit for two H4Rs plus H4TU-R span powering.
Figure 22. HDSL4 Circuit Segments
According to the number of H4Rs in the HDSL4
circuit, the following service ranges apply:
• An HDSL4 circuit containing no H4Rs will reach
up to 15,250 ft on the local loop 24 AWG)
[10,800 ft for 26 AWG].
• An HDSL4 circuit containing one H4R will reach
up to 15,250 ft on the first segment and 15,050 ft
on the second segment 24 AWG) [10,550 ft for
26 AWG].
• An HDSL4 circuit containing two H4Rs will
reach to 12 kft on the first segment, 13.5 kft on
the second segment, and 15 kft on the third
segment 24 AWG). *
*This is one example of a circuit with 2 H4 s. Other loop length
configurations are possible in compliance with loop resistance
restraints.
NOTE
DSL Assistant must be used to engineer HDSL4
circuits with two repeaters.
The ADTRAN HDSL4 system provides DS1-based
services over loops designed to comply with the
guidelines given below. These guidelines apply to the
first segment in the circuit between the H4TU-C and
the first H4R) or an HDSL4 circuit with no H4Rs.
1. All loops are nonloaded only.
2. Any single bridged tap is limited to 2 kft.
3. Total bridged tap length is limited to 2.5 kft.
4. Insertion Loss: See Table 5 for loop insertion
loss requirements.
5. Loop Attenuation:
pstream Downstream
1st segment 31 dB 33 dB
2nd segment 30 dB 30 dB
3rd segment 30 dB 30 dB
1st Segment
H4TU-C 1st H4R 2nd H4R H4TU-R
2nd Segment 3rd Segment
Table 5. HDSL4 Loop Insertion Loss Values
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6910.24A/N

1761222401L1-5C
2. Find the first segment resistance on the vertical
axis.
3. Find the second segment resistance on the
horizontal axis.
4. Find the instance where the two points from steps
2 and 3 meet on the graph.
).tfk/smho(ecnatsiseR
GWAFº07*Fº09Fº021**Fº041
91
22
42
62
564.61
600.33
894.25
574.38
381.71
644.43
987.45
711.78
162.81
606.63
522.85
185.29
979.81
640.83
615.06
322.69
atadFº021dnaFº07neewtebdetalopretnI*
atadFº021dnaFº07morfdetalopartxE**
5. The point found in Step 4 must be below the
upper limit line defined by the third segment
measurement (Step 1). If the instance where these
two points is above this line, the H4TU-C cannot
span power two H4Rs and the H4TU-R.
Note that these measurements represent only one of
the two HDSL4 pairs.
Figure 23. Resistance Budget Span Powering Two Repeaters
3
0
0
o
h
m
s
5
0
0
o
h
m
s
7
0
0
o
h
m
s
9
0
0
o
h
m
s
1
1
0
0
o
h
m
s
HDSL4 Single Pair Resistance for Span Powering Two Repeaters and an H4TU-R
Resistance Budget
Second Segment Resistance (ohms)
First Segment Resistance (ohms)
1100
1000
900
800
700
600
500
400
300
300 400 500 600 700 800 900 1000 1100
WITHIN LIMITS
OUTSIDE LIMITS
Third Segment Resistance
Table 6. Single Pair Cable DC Resistance Value

18 61222401L1-5C
Figure 24. Resistance Budget Span Powering Two Repeaters (Example)
3
0
0
o
h
m
s
5
0
0
o
h
m
s
7
0
0
o
h
m
s
9
0
0
o
h
m
s
1
1
0
0
o
h
m
s
HDSL4 Single Pair Resistance for Span Powering Two Repeaters and an H4TU-R
Resistance Budget
Second Segment Resistance (ohms)
First Segment Resistance (ohms)
1100
1000
900
800
700
600
500
400
300
300 400 500 600 700 800 900 1000 1100
WITHIN LIMITS
OUTSIDE LIMITS
Third Segment Resistance
An example problem is illustrated in Figure 24. For
this example, begin with three known measurements:
600 ohm first segment resistance, 700 ohm second
segment resistance, and 900 ohm third segment
resistance. See Figure 24 and the following steps to
solve the example problem:
1. Find the 900 ohm third segment resistance line
on the graph. This line is depicted in bold in
Figure 24. This line is the upper span power
limit.
2. Find the 600 ohm first segment resistance point
on the vertical axis.
3. Find the 700 ohm second segment resistance
point on the horizontal axis.
4. Find the instance on the graph where the points
from Steps 2 and 3 meet.
5. If this point is below the bold line defined in
Step 1 the circuit is capable of span powering two
H4Rs and one H4TU-R.

1961222401L1-5C
Simplified Loop Qualification Procedure
The field technician should be provided with the
expected insertion loss at four frequencies, based on
the engineering loop design. This design will be
based on records of the loop plant. Assuming
accurate loop records, the insertion loss values should
be within 1 dB of the design. If they are not, the
simplified loop qualification procedure below
provides the technician some assurance of the HDSL4
performance.
Single Span and First Segment of Repeatered
Loop
For each of the four measured insertion loss values,
compute the difference between the maximum loss
and the measured loss max – measured). The
worksheet provided below may be used to record
these values.) If all four of the differences are
positive, then the loop meets the performance criteria.
If any one of the four difference values is negative
measured loss is more than maximum loss), then the
sum of the four differences must be at least +3 dB. If
neither of these criteria is satisfied, then the loop is
suspect and may not provide robust HDSL4
deployment.
Second Segment of Repeatered Loop
For each of the three measured insertion loss values,
compute the difference between the maximum loss
and the measured loss max – measured). The
worksheet provided below may be used to record
these values.) If all three of the differences are
positive, then the loop meets the performance criteria.
If any one of the three difference values is negative
measured loss is more than maximum loss), then the
sum of the three differences must be at least +1 dB. If
neither of these criteria is satisfied, then the loop is
suspect and may not provide robust HDSL4
deployment.
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055.13
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0311.93
6910.34
*
=ssoLatleDmuS
*
atledruofehtfomusehtneht,)0<ssolatled(ssolmumixamehtsdeecxessolnoitresniycneuqerfelgnisynafI
.Bd0.3>ebtsumseulavssol
)zHk(ycneuqerF)Bd(ssoLmumixaM)Bd(ssoLderusaeM )Bd(ssoLatleD
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059.92
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=ssoLatleDmuS
*
atledeerhtehtfomusehtneht,)0<ssolatled(ssolmumixamehtsdeecxessolnoitresniycneuqerfelgnisynafI
.Bd0.1>ebtsumseulavssol
Table 7. Qualification Worksheet for Single Span and First Segment of Repeatered Loop
Table 8. Qualification Worksheet for Second Segment of Repeatered Loop

20 61222401L1-5C
7. MAINTENANCE
The ADTRAN H4TU-C requires no routine
maintenance. In case of equipment malfunction, use
the front panel bantam jack connectors to help locate
the source of the problem.
ADTRAN does not recommend that repairs be
performed in the field. Repair services may be
obtained by returning the defective unit to ADTRAN.
For more information refer to Warranty and Customer
Service section.
8. PRODUCT SPECIFICATIONS
Product specifications are detailed in Table 9.
9. WARRANTY AND CUSTOMER SERVICE
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
www.adtran.com/warranty.
USA and Canada customers can also receive a copy of
the warranty via ADTRAN’s toll-free faxback server
at 877-457-5007.
• Request Document 414 for the U.S. and Canada
Carrier Networks Equipment Warranty.
• Request Document 901 for the U.S. and Canada
Enterprise Networks Equipment Warranty.
Refer to the following subsections for sales, support,
CAPS requests, or further information.
ADTRAN Sales
Pricing/Availability:
800-827-0807
ADTRAN Technical Support
Pre-Sales Applications/Post-Sales Technical Assistance:
800-726-8663
Standard hours: Monday - Friday, 7 a.m. - 7 p.m. CST
Emergency hours: 7 days/week, 24 hours/day
ADTRAN Repair/CAPS
Return for Repair/Upgrade:
[phone]
Repair and Return Address
Contact Customer and Product Service (CAPS) prior
to returning equipment to ADTRAN.
ADTRAN, Inc.
CAPS Department
901 Explorer Boulevard
Huntsville, Alabama 35806-2807