ADTRAN T200 H2TU-R Instruction Manual

161222024L6-5, Issue 161222024L6-5A
Section 61222024L6-5A
Issue 1, June 2001
CLEI T1L4U7PC _ _
CONTENTS
1. GENERAL ........................................................................ 1
2. INSTALLATION ..............................................................2
3. CONNECTIONS .............................................................. 4
4. HDSL2 SYSTEM TESTING ............................................4
5. CONTROL PORT OPERATION .................................... 5
6. HDSL2 DEPLOYMENT GUIDELINES ...................... 15
7. TROUBLESHOOTING PROCEDURES ...................... 16
8. MAINTENANCE ........................................................... 16
9. PRODUCT SPECIFICATIONS .................................... 16
10. WARRANTY AND CUSTOMER SERVICE .............. 16
Appendix A. HDSL2 Loopbacks ...................................... A-1
FIGURES
Figure 1. ADTRAN T200 H2TU-R MON ........................ 1
Figure 2. H2TU-R MON Diagram ..................................... 4
Figure 3. HDSL2 Loopbacks .............................................. 5
Figure 4. RS-232 (DB-9) Pin Assignment ......................... 5
Figure 5. Main Menu Screen .............................................. 6
Figure 6. HDSL2 Unit Information Screen ........................ 7
Figure 7. Provisioning Screen ............................................ 8
Figure 8. Span Status Screen .............................................. 8
Figure 9. Detailed System Status Screen............................ 9
Figure 10. Loopback and Test Commands Screen ............... 9
Figure 11. 24-Hour Performance History
Path Data Screen ............................................... 10
Figure 12. 15-Minute Performance History
Line Data Screen ............................................... 10
Figure 13. Performance Data Definitions Screen,
Loop Related ..................................................... 11
Figure 14. Performance Data Definitions Screen,
Path Related ....................................................... 11
Figure 15. Circuit ID, Time/Date Screen ........................... 12
Figure 16. Terminal Modes Menu Screen .......................... 12
Figure 17. Alarm History Screen ........................................ 13
Figure 18. Event History Screen......................................... 14
Figure 19. HDSL2 Deployment Guidelines ....................... 15
Figure A-1. HDSL2 Lkoopback Points .............................. A-1
Figure A-2. HDSL2 Element State Diagram ...................... A-1
TABLES
Table 1. Compliance Codes .............................................. 2
Table 2. Front Panel Indicators ..........................................3
Table 3. Front Panel Loopback Buttons ............................ 3
Table 4. Card Edge Pin Assignments ................................ 4
Table 5. Screen Abbreviations .......................................... 6
Table 6. HDSL2 Loss Values .......................................... 15
Table 7. Loop Insertion Loss Data .................................. 15
Table 8. Troubleshooting Guide ..................................... 16
Table 9. T200 H2TU-R Specifications ........................... 17
Table A-1. HDSL2 Loopback Control Codes ................... A-3
T200 H2TU-R, Local Power
High-bit-rate Digital Subscriber Line Remote Unit
Installation and Maintenance
1. GENERAL
The ADTRAN 2-Wire T200 HDSL2 Transceiver Unit
for the Remote end (H2TU-R), ADTRAN /N
1222024L6, is a network terminating unit used to
deploy an HDSL2 T1 circuit using 2-wire metallic
facilities. The H2TU-R is illustrated in Figure 1. The
H2TU-R is a T200 mechanics card which will fit
T200 or T400 mechanics enclosures. The H2TU-R
can be housed in the ADTRAN standalone metal
enclosure ( /N 1242034LX) or the T200 Dual-Mount
Enclosure ( /N 1245034L1). Refer to the appropriate
ADTRAN practice for more information. The T200
H2TU-R card can also plug into the ADTRAN HR12
HDSL remote shelf ( /N 1242007LX), or the
ADTRAN HR4 HDSL remote shelf ( /N 1242008L1).
In all applications the H2TU-R must be installed in
NEBS compliant and UL listed enclosures to ensure
full compliance with this unit.
Figure 1. ADTRAN T200 H2TU-R MON
TX
RX
C
U
S
T
M
O
N
1222024L6
REM
LOC
L
B
K
ALM
DS1
DSL
LBK
ESF/SF
(YEL)(GRN)
B8ZS/AMI
(YEL) (GRN)
Trademarks: Any brand names and product names included in this document are
trademarks, registered trademarks, or trade names of their respective holders.

2 61222024L6-5, Issue 1 61222024L6-5A
This version of the H2TU-R works with multiple list
versions of the HDSL2 transceiver unit for the central
office (H2TU-C), as listed here.
Unit Number Description
1221001LX .......... 220/E220 H2TU-C
1221003LX .......... DDM+ H2TU-C
1221004LX .......... 3192 H2TU-C
1221006L6........... T200 H2TU-C
1222001LX .......... 2nd Gen 220/E220 H2TU-C
1222003LX .......... 2nd Gen DDM+ H2TU-C
1222004LX .......... 2nd Gen 3192 H2TU-C
1181111LX .......... Total Access H2TU-C
1181112LX .......... 2nd Gen Total Access H2TU-C
The H2TU-R can be deployed in circuits using one
H2TU-C.
The H2TU-R terminates local loop HDSL2 signals
originating from the Central Office (CO) H2TU-C
unit and transforms the HDSL2 signal into traditional
T1 signals to be delivered to the customer.
This unit is intended for Local ower Only (-24 Vdc
to -48 Vdc). If a span power unit is needed, refer to
/N 1222026L6.
Revision History
This is the initial release of this document. Future
revisions to this document will be explained in this
subsection.
2. INSTALLATION
After unpacking the unit, inspect it for damage. If
damage is noted, file a claim with the carrier, then
contact ADTRAN. See Warranty and Customer
Service.
Remote Provisioning
This H2TU-R can be used to provision the entire
HDSL2 circuit via the craft interface.
The settings on the H2TU-C are encoded and
transmitted to the H2TU-R once the circuit has
achieved synchronization. There are no switch
settings on the H2TU-R.
Compliance Codes
Table 1 shows the Compliance Codes for the
H2TU-R. The H2TU-R complies with the
requirements covered under UL 60950 third edition
and is intended to be installed in an enclosure with an
Installation Code (IC) of “B” or “E.”
CAUTION
Voltages up to -200 Vdc may be present on the
telecommunications wiring.
NOTE
This product is intended for installation in
Restricted Access Locations only.
Front Panel Indicators
There are six front panel mounted status indicators,
described in Table 2.
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.
Code Input Output
Installation Code (IC) A –
Telecommunication Code (TC) X X
ower Code ( C) C C
Table 1. Compliance Codes

361222024L6-5, Issue 161222024L6-5A
Table 3. Front Panel Loopback Buttons
Front Panel Buttons
Two loopback (LBK) buttons are accessible from the
front panel. The REM loopback button controls a
customer loopback at the H2TU-C. The LOC
loopback button controls a bidirectional loopback at
the H2TU-R. See Table 3 for details.
Front Panel DS1 Monitor Jack
The H2TU-R provides DS1 monitoring bantam jacks.
These jacks provide a nonintrusive monitor point for
DS1 traffic to and from the customer. For more
details, see Section 4 of this practice.
Table 2. Front Panel Indicators
Description
Indicates HDSL2 signal quality on the Loop is in one of the following five states
Off ................. No synchronization of H2TU-C and H2TU-R
Red ................ oor signal quality on Loop (≥ 10-7 BER)
Yellow ........... Marginal signal quality on Loop (≤ 2 dB margin above 10-7 BER)
Green ............ Good signal quality on Loop (> 2 dB margin above 10-7 BER)
Blinking ......... Detected error on either end
Indicates three possible conditions:
Off ................. Customer-side DS1 signal is absent or is of a format that does not
match the HDSL2 circuit provisioning
Blinking ......... Detected error on the DS1 interface
Green ............ Customer-side DS1 signal is present and synchronized
Indicates three possible alarm conditions:
Off ................. No alarm condition detected
Red ................ Detected local alarm condition (H2TU-R)
Yellow ........... Detected remote alarm condition (H2TU-C)
Indicates three possible framing modes:
Yellow ........... Indicates DS1 is provisioned for ESF framing mode
Green ............ Indicates DS1 is provisioned for SF framing mode
Off ................. Indicates DS1 is provisioned for Unframed operation
Indicates two possible line codes:
Yellow ........... Indicates DS1 is provisioned for B8ZS coding
Green ............ Indicates DS1 is provisioned for AMI coding
Indicates three possible loopback conditions:
Off ................. Unit is not in loopback or armed state
Yellow ........... Active local customer, network or bidirectional loopback at the
H2TU-R
Blinking ......... Unit is armed but not in active loopback condition
Indicator
DSL .........................
DS1 ..........................
ALM ........................
ESF/SF ....................
B8ZS/AMI...............
LBK .........................
S itch
Label Function
REM .......... ressing this button changes the H2TU-C customer
loopback state as follows:
• If the H2TU-C is not in loopback, pressing
REM activates a customer loopback.
• If the H2TU-C is in loopback, pressing REM
deactivates the loopback.
LOC ........... ressing this button changes the H2TU-R
bidirectional loopback state as follows:
• If the H2TU-R is not in loopback, pressing LOC
activates the bidirectional loopback.
• If the H2TU-R is in loopback, pressing LOC
deactivates the bidirectional loopback.
TX
RX
C
U
S
T
M
O
N
1222024L6
REM
LOC
L
B
K
ALM
DS1
DSL
LBK
ESF/SF
(YEL)(GRN)
B8ZS/AMI
(YEL) (GRN)

4 61222024L6-5, Issue 1 61222024L6-5A
3. CONNECTIONS
All connections of the H2TU-R are made through card
edge connectors. Table 4 gives the card edge pin
assignments for the H2TU-R circuit pack.
The six front panel LEDs provide diagnostics for
HDSL2 loops, DS1 signals, alarms, provisioning and
loopbacks. See section 2 of this practice for details.
The H2TU-R provides local and remote loopback
capabilities via the loopback switches on the front
panel.
The DS1 MON jacks provides a nonintrusive access
for DS1 signal monitoring.
DS1 MON Bantam Jacks
The jack labeled “MON” provides a nonintrusive
access point for monitoring the transmit and receive
signals at the DS1 interface point.
In general, the monitoring jacks provide a non-
intrusive tap onto a signal line that permits the
connection of test equipment to monitor the
characteristics of that signal. For example, the DS1
MON jack on the H2TU-R could be used to connect to
a bit error rate tester to monitor for synchronization,
test patterns, etc. Figure 2 is an illustration of
specific jack detail.
Figure 2. H2TU-R MON Diagram
Tx
Rx
CUST
MON
H2TU-R
T
R
T1
R1
When the circuit pack is installed in any of the
H2TU-R enclosures, all connections are made through
the enclosure backplanes. See the following
ADTRAN documents for more information:
• 61242007L1-5, HR12 Installation/Maintenance
• 61242008L1-5, HR4 Installation/Maintenance
• 61242034L3-5, T400 Single-Mount High
Voltage Installation/Maintenance
• 61245034L1-5, T200 Dual-Mount Installation/
Maintenance
ADTRAN’s T200 Dual-Mount housing ( /N
1245034L1) is required when using the T200 H2TU-R
for HDSL2 Loop Support System (H-LSS ™).
NOTE
Ensure chassis ground is properly connected for
either standalone or shelf-mounted applications.
4. HDSL2 SYSTEM TESTING
The T200 H2TU-R provides diagnostic, loopback, and
signal monitoring capabilities.
H2TU-R Network Loopbacks
The H2TU-R responds to multiple loopback activation
processes. The loopback position is a logic loopback
located within the H2TU-R internal HDSL
transceiver. See Figure 3.
First, manual loopback activation may be
accomplished using the control port of the H2TU-C.
Refer to the ADTRAN H2TU-C Installation and
Maintenance practice ( /N 61222001LX-5) or other
H2TU-C practices for more information.
Table 4. Card Edge Pin Assignments
Pin Designation Description
1 ......... CH GND....... Chassis ground
5 ......... DS1-T1 ......... DS1 receive out tip (to customer
interface)
7 ......... H1-T ............. HDSL2 Loop tip (facility)
11 ....... CH GND ....... Chassis ground
12 ....... GND .............. Ground for protection switching
13 ....... H1-R ............. HDSL2 Loop ring (facility)
15 ....... DS1-R1 ......... DS1 receive out ring (to customer
interface)
17 ....... -48VR ........... -48 Vdc Return
20 ....... VCC .............. +5 Vdc for protection switching
27 ....... CH GND ....... Chassis ground
35 ....... -48VR ........... -48 Vdc
40 ....... ROT-1......... Control line for protection switching
49 ....... DS1-R ........... DS1 transmit in ring (from customer
interface)
55 ....... DS1-T ........... DS1 transmit in tip (from customer
interface)

561222024L6-5, Issue 161222024L6-5A
Second, the H2TU-R will respond to the industry
defacto HDSL2 loopback codes as designated in the
ANSI document T1E1.4/92. A synopsis of the
method described by ANSI is presented in Appendi A.
Third, the H2TU-R will respond to manual loopback
activation by pressing the LOC LBK button on the
faceplate. This will activate a bidirectional loopback
at the H2TU-R.
Finally, the H2TU-R responds to T1 Network
Interface Unit (NIU) loopback codes as described in
Bellcore TR-TSY-000312 if the H2TU-R is optioned
for NIU loopbacks. The NIU loopback codes are as
follows:
In-band Codes: Loop up ...........11000
Loop down.......11100
ESF Codes: Loop up ...........0001 0010 1111 1111
Loop down.......0010 0100 1111 1111
Receiving the in-band codes for more than five
seconds or the ESF codes for four consecutive
repetitions will cause the appropriate loopback action.
The H2TU-R will respond to the loop up codes by
activating the NIU loopback from either the disarmed
or armed state. The loop down codes will return the
H2TU-R to the normal state from the armed or loop
up state.
Refer to Appendix A for more details on loopbacks
and loopback arming sequences.
Figure 3 illustrates all of the possible loopback
locations of the ADTRAN HDSL2 equipment.
Customer Loopbacks
In addition to the loopbacks in the direction of the
network, the H2TU-R may also be looped back in the
direction of the customer using the terminal control
port of the H2TU-C or the LOC LBK switch on the
front panel of the H2TU-R. The LOC LBK switch
enables a bidirectional loopback. The H2TU-C can be
looped to the customer using the REM LBK switch on
the front panel of the H2TU-R. The H2TU-C and
H2TU-R Customer Side Loopbacks are illustrated in
Figure 3.
NOTE
Network and customer loopbacks are governed
by the loopback time out option configured on
the H2TU-C.
5. CONTROL PORT OPERATION
The H2TU-R provides a faceplate-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 4.
The terminal interface operates at data rates from
1.2 kbps to 19.2 kbps. The asynchronous data format
is fixed at 8 data bits, no parity, and 1 stop bit. The
supported terminal type is dumb terminal, VT100 or
compatible.
6
7
8
9
1
2
3
4
5
TXD (Transmit Data)
RXD (Receive Data)
SGN (Signal Ground)
Figure 4. RS-232 (DB-9) Pin Assignments
Figure 3. HDSL2 Loopbacks
DSX-1
H2TU-C
LOCAL
LOOP
H2TU-C Network-Side Loopback
H2TU-R
H2TU-C
LOCAL
LOOP
H2TU-R Customer-Side Loopback
H2TU-R
H2TU-C
LOCAL
LOOP
H2TU-C Customer-Side Loopback
H2TU-R
X
X
DS1
DSX-1
H2TU-C
LOCAL
LOOP
H2TU-R Network-Side Loopback or
H2TU-R NIU Loopback
H2TU-R
XDS1
DS1
DS1
X
AIS
AIS
AIS
AIS
X = Signal Inactive
H2TU-C
LOCAL
LOOP
H2TU-R Bidirectional Loopback
DS1DSX-1
DSX-1
DSX-1
H2TU-R

6 61222024L6-5, Issue 1 61222024L6-5A
NOTE
If you are using a personal computer ( C) with
terminal emulation capability, be sure to disable
any power saving programs. Otherwise,
communication between the C and the HDSL2
unit may be disrupted, resulting in misplaced
characters or screen timeouts.
Operation
For abbreviations used in the screen diagrams, see
Table 5. The H2TU-C also provides a erformance
Data Definitions Screen, which gives performance
monitoring related abbreviations, see Figure 14.
The screens illustrated in Figures 5 through 18 apply
to an HDSL2 circuit deployed with ADTRAN’s
HDSL2 technology. The circuit includes an H2TU-C
and an H2TU-R. Other configurations are possible
(i.e. other vendor’s equipment) and their displays will
vary slightly from those shown in this section.
A terminal session is initiated by entering multiple
space bar characters, which are used by the H2TU-R
to determine the speed of the terminal. Once the
speed has been determined, an HDSL2 Main Menu is
presented, as illustrated in Figure 5.
Figure 5. Main Menu Screen
CIRCUIT ID: 01/01/00 00:00:40
Adtran HDSL2 Main Menu
1. HDSL2 Unit Information
2. Provisioning
3. Span Status
4. Loopbacks and Test
5. Performance History
6. Circuit ID, Time/Date
7. Terminal Modes
8. Alarm History
9. Event History
Selection:
Table 5. Screen Abbreviations
noitaiverbbAnoitinifeD
TEN)1-XSD(krowteN
TSUC)1SD(remotsuC
SOLlangiSfossoL
FStamroFemarfrepuS
FSEtamroFemarfrepuSdednetxE
SZ8BnoitutitsbuSoreZ8htiwralopiB
IMAnoisrevnIkraMetanretlA
NETTApool2LSDHnonoitaunettaesluP
NIGRAM01evobaBdninigramesion-ot-langiS
7-
tiB
etarrorrE
OBLtuOdliuBeniL
VPBsnoitaloiVralopiB
ahcihwnidnoceS..../XSD
srrucconoitaloivralopib
UINtinUecafretnIkrowteN1T
N/SrebmuNlaireS
M51doirepetuniM-neetfiF
H42doirepruoH-ruoF-ytnewT

761222024L6-5, Issue 161222024L6-5A
The Main Menu provides access to detailed
performance and configuration information. Selecting
the corresponding number or letter can access the
following screens:
1. HDSL2 Unit Information
2. rovisioning
3. Span Status
4. Loopbacks and Test
5. erformance History
6. Circuit ID, Time/Date
7. Terminal Modes
8. Alarm History
9. Event History
The HDSL2 Unit Information Screens, illustrated in
Figure 6, provides detailed product information on
each component in the HDSL2 circuit. This Screen
also displays contact information for ADTRAN
Technical Support, Internet Site, and address.
Figure 6. HDSL2 Unit Information Screen
CIRCUIT ID: 01/01/00 03:35:35
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 H2TU-C ADTN H2TU-R
List: 2 List: 6
S/N: 123456789 S/N: 123456789
CLEI: T1L3X4NAAA CLEI: T1L4U7PCAA
Manf: 01/01/2000 Manf: 01/01/2000

8 61222024L6-5, Issue 1 61222024L6-5A
Figure 8. Span Status Screen
The rovisioning Screen, illustrated in Figure 7,
displays the current provisioning settings for the
HDSL2 circuit.
CIRCUIT ID: 01/01/00 00:02:56
Press ESC to return to previous menu
Span Status Screen
ATTEN
______ <-03dB-> ______
|H2TUC | |H2TUR |
<------| | | |------>
| | | |
| | | |
| | | |
NET | |<--------->| | CUST
| |15dB 14dB| |
| | MARGIN | |
| | | |
--LOS->| | | |<-AIS—
|______| |______|
DSX-1 DS1
1. Legend
2. Detailed Status
Selection:
Figure 7. Provisioning Screen
CIRCUIT ID: 01/01/00 00:02:15
Press ESC to return to previous menu
Provisioning
1. DSX-1 Line Buildout = 0-133 Feet
2. DSX-1/DS1 Line Code = B8ZS
3. DSX-1/DS1 Framing = ESF
4. NIU Loopback = Enabled
5. Loopback Timeout = 20 Minutes
6. DS1 TX Level = 0 dB
Selection:
The Span Status Screen, illustrated in Figure 8,
provides quick access to status information for each
HDSL2 receiver in the circuit.

961222024L6-5, Issue 161222024L6-5A
The Detailed Status selection from the System Status
Menu, illustrated in Figure 9, displays the T1 and
HDSL2 status for each receiver point. The Legend
selection provides a description of the messages that
are used on the Status Screens. A key to the
information provided on these screens is shown
below. There is also a Zero Registers selection, which
applies only to error indicators displayed on the status
screen.
Figure 9. Detailed System Status Screen
CIRCUIT ID: 01/01/00 00:05:18
Press ESC to return to previous menu
Detailed HDSL2 and T1 Status
HDSL2 RECEIVER DATA
H2TU-C H2TU-R
-------- --------
MARGIN(CUR/MIN/MAX): 15/00/16 14/00/15
ATTEN(CUR/MAX): 02/02 03/03
ES 15MIN: 000 000
SES 15MIN: 000 000
UAS 15MIN: 026 016
T1 RECEIVER DATA
DSX-1 DS1
------- -------
FRAMING: ESF ESF
LINE CODE: B8ZS B8ZS
ES-P/ES-L: 000/000 000/001 1. Zero Registers
SES-P/SES-L: 000/000 000/000 2. Restart Min/Max
UAS-P/UAS-L: 000/315 304/000
ALARMS: RED BLUE Selection:
Figure 10 illustrates the Loopback and Test
Commands Screen, which provides the user with the
ability to evoke or terminate all available HDSL2
loopbacks. Each HSDL2 circuit component can be
looped toward the network or customer from this
screen. It also provides a self-test option to perform a
self-diagnostic of the H2TU-C and H2TU-R. A Loop
down ALL units command is available in lieu of the
Self-Test Option when any loopback is active.
Figure 10. Loopback and Test Commands Screen
CIRCUIT ID: 01/01/00 00:05:52
Press ESC to return to previous menu
Loopback and Test Commands
______ ______
|H2TUC | |H2TUR |
<------| | | |------>
| | | |
| | | |
| | | |
NET | |<--------->| | CUST
| | | |
| | | |
| | | |
------>| | | |<------
DSX-1 |______| |______| DS1
1. Run Self Tests
2. H2TU-C Loopup Network
3. H2TU-C Loopup Customer
4. H2TU-R Loopup Network
5. H2TU-R Loopup Customer
Selection:

10 61222024L6-5, Issue 1 61222024L6-5A
The erformance History Screens, illustrated in
Figure 11 and Figure 12, display the historical
HDSL2 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
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 7
days of 24-hour interval data.
The user is prompted to select a module and interface
to view the corresponding performance data. Line (L)
and ath ( ) related data can be viewed.
Figure 11. 24-Hour Performance History Path Data Screen
Figure 12. 15-Minute Performance History Line Data Screen
CIRCUIT ID: 01/01/00 00:06:35
Press ESC to return to previous menu
Menu 24 Hour H2TUC DSX-1 Performance Data
1. Definitions ES-P SES-P UAS-P CV-P
2. Reset Data 00000 00000 00000 0000000
3. 15 Min Data 12/31 ----- ----- ----- -------
4. 24 Hr Data 12/30 ----- ----- ----- -------
5. Line Data 12/29 ----- ----- ----- -------
6. Path Data 12/28 ----- ----- ----- -------
7. H2TUC DSX-1 12/27 ----- ----- ----- -------
8. H2TUC LOOP 12/26 ----- ----- ----- -------
9. H2TUR LOOP 12/25 ----- ----- ----- -------
10. H2TUR DS1
Selection:
CIRCUIT ID: 01/01/00 00:08:15
Press ESC to return to previous menu
Menu 15 Minute H2TUC DSX-1 Performance Data
1. Definitions ES-L SES-L UAS-L CV-L
2. Reset Data 000 000 492 00000
3. 15 Min Data 00:00 --- --- --- -----
4. 24 Hr Data 23:45 --- --- --- -----
5. Line Data 23:30 --- --- --- -----
6. Path Data 23:15 --- --- --- -----
7. H2TUC DSX-1 23:00 --- --- --- -----
8. H2TUC LOOP 22:45 --- --- --- -----
9. H2TUR LOOP 22:30 --- --- --- -----
10. H2TUR DS1 22:15 --- --- --- -----
22:00 --- --- --- -----
21:45 --- --- --- -----
21:30 --- --- --- -----
21:15 --- --- --- -----
F. Forward
Selection:
_ _ _ _ _ _
--7-->| | | |---->
| C |<-8--9->| R |
<-----|_ _ _| |_ _ _|<-10-
_ _ _ _ _ _
--7-->| | | |---->
| C |<-8--9->| R |
<-----|_ _ _| |_ _ _|<-10-

1161222024L6-5, Issue 161222024L6-5A
Figure 13 and Figure 14 display the erformance
Data Definitions Screens.
Figure 13. Performance Data Definitions Screen, Loop Related
Figure 14. Performance Data Definitions Screen, Path Related
CIRCUIT ID: 01/01/00 03:38:08
Performance Data Definitions
H2TUC, H2TUR, and H2R LOOP Related: HDSL2 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
UAS-L Unavailable Seconds >10 cont. SES-Ls
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: 01/01/00 03:38:27
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
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:

12 61222024L6-5, Issue 1 61222024L6-5A
Figure 15. Circuit ID, Time/Date Screen
Figure 16. Terminal Modes Menu Screen
Figure 15 illustrates the Circuit ID, Time/Date
Screen. The circuit ID can be any alphanumeric
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 31, 2000,
as “013100”).
This unit includes two terminal emulation modes.
The desired terminal mode can be selected from the
Terminal Modes Screen, illustrated in Figure 16.
Additionally, pressing “CTRL” and “T” while on any
screen can toggle the two terminal modes.
The default terminal emulation mode is the Real Time
Update Mode (VT100). This mode provides real time
updating of HDSL2 circuit conditions and
provisioning options as changes occur. While in Real
Time Update mode, the unit is anticipating baud poll
responses from the terminal.
CIRCUIT ID: 01/01/00 03:39:40
Press ESC to return to previous menu
New Circuit ID =
New Date = / / (MM/DD/YY)
New Time = : : (HH:MM:SS)
Press TAB to skip to next entry field.
Press ENTER to set new Circuit ID.
CIRCUIT ID: 01/01/00 00:40:53
Press ESC to return to previous menu
TERMINAL MODES MENU
MANUAL UPDATE MODE:
* You can print or log screens
* No text is highlighted
* “3 SPACES TO UPDATE” appears at the top of each screen,
reminding you to press the spacebar 3 times to update the screen
* There is a delay between screen changes & updates
* After 30 min. of no interaction, a new baud rate search is begun
* Ignores input until screen is finished printing.
REAL-TIME UPDATE MODE:
* Faster of the two modes
* You cannot print screens to a log file
* Highlighting is enabled
* Recommended for daily operation
Press CTRL+T to toggle update modes on any screen.

1361222024L6-5, Issue 161222024L6-5A
The second terminal emulation mode is Manual
Update Mode which allows the user to manually
update the provisioning option screens. This mode
supports efficient print screen and log file utilities for
storage of key provisioning parameters, alarm or
performance history and current system status. “3
S ACES TO U DATE” appears at the top of each
screen. By pressing the space bar 3 times the screen
will be refreshed and will reflect the most current
circuit conditions and provisioning options.
Figure 17. Alarm History Screen
The Alarm History Screen, illustrated in Figure 17,
provides the user with a detailed alarm history and
events log for the HDSL2 and T1 spans. This screen
includes a time, date, first/last occurrence and count
for each type of HDSL2 or T1 alarm.
CIRCUIT ID: 01/01/00 00:41:34
Press ESC to return to previous smenuen
T1 Alarm History
LOCATION ALARM FIRST LAST CURRENT COUNT
--------------------------------------------------------------------------------
H2TU-C RED(LOS/LOF) 01/01/00 00:00:04 01/01/00 00:00:04 Alarm 001
(DSX-1) YELLOW(RAI) OK 000
BLUE(AIS) OK 000
H2TU-R RED(LOS/LOF) OK 000
(DS1) YELLOW(RAI) OK 000
BLUE(AIS) 01/01/00 00:00:31 01/01/00 00:00:31 Alarm 001
--------------------------------------------------------------------------------
1. T1 Alarm 2. HDSL2 Span C. Clear T1 Alarm
Selection:

14 61222024L6-5, Issue 1 61222024L6-5A
The Event History Screen, illustrated in Figure 18,
provides a log history of HDSL2 circuit events. The
following is a summary list of possible events:
Circuit ID Change
DS1 Transmit Level Option Change
DSX/DS1 Alarm Type Active/Inactive
DSX-1 Line Build Out Option Change
Element Network/Customer Loop up/Loop down
Event Log Reset
External Alarm Blocking Change
Framing Option Change
H2TU-C/H2TU-R owered Up
HDSL2/T1 M Registers Reset
Line Code Option Change
Loopback Time out Option Change
Network Source Setting Change
NIU Loopback Option Change
Options were Auto rovisioned from SCU
rotection Switching Option Changes
Service State Setting Change
Shelf Alarm Option Change
Span ower Option Change
Time/Date Changed From/To
Figure 18. Event History Screen
CIRCUIT ID: 01/01/00 03:40:56
Press ESC to return to previous menu
Num Description of Event Date Time
------------------------------------------------------------------
1. H2TU-C Powered Up 01/01/00 00:00:01
Page Number: 1/ 1 Number of Events: 1
------------------------------------------------------------------
‘P’ - Previous Page ‘H’ - Home ‘R’ - Reset Events
‘N’ - Next Page ‘E’ - End
Selection:

1561222024L6-5, Issue 161222024L6-5A
Loop loss per kft for other wire is summarized in
Table 6.
Recommended maximum local loop loss information
for IC cable at 70°F, 135 Ω, resistive termination is
provided in Table 7.
An approximation for the maximum amount of
wideband noise on an HDSL2 local loop as measured
by a 50 kb filter is < 31 dBrn.
An approximation for the maximum level of impulse
noise as measured using a 50 kb filter on an HDSL2
loop is < 50 dBrn.
NOTE
These approximations are to be used as guidelines
only and may vary slightly on different loops.
Adhering to the guidelines should produce
performance in excess of 10-7 BER.
For further information regarding deployment
guidelines and applications, reference ADTRAN’s
Supplemental Deployment Information for HDSL/
HDSL2 document, /N 61221HDSLL1-10.
6. HDSL2 DEPLOYMENT GUIDELINES
The ADTRAN HDSL2 system is designed to provide
DS1-based services over loops designed to comply
with Carrier Service Area (CSA) guidelines. CSA
deployment guidelines are given below.
1. All loops are non-loaded only.
2. For loops with 26-AWG cable, the maximum
loop length including bridged tap lengths is 9 kft.
3. For loops with 24-AWG cable, the maximum
loop length including bridged tap lengths is
12 kft.
4. Any single bridged tap is limited to 2 kft.
5. Total bridged tap length is limited to 2.5 kft.
6. The total length of multi-gauge cable containing
26-AWG cable must not exceed
12 - {(3*L26)/(9-LBTA )} (in kft)
L26 = Total length of 26-AWG cable
excluding bridged taps (in kft)
LBTA = Total length of all bridged taps (in kft)
This deployment criteria is summarized in the chart
shown in Figure 19.
Cable Cable Temperature
Gauge Type 68°90°120°
26 .......... IC ........ 3.902 ..... 4.051 ..... 4.253
26 .......... ulp ....... 4.030 ..... 4.179 ..... 4.381
24 .......... IC ........ 2.863 ..... 2.957 ..... 3.083
24 .......... ulp ....... 3.159 ..... 3.257 ..... 3.391
22 .......... IC ........ 2.198 ..... 2.255 ..... 2.333
22 .......... ulp....... 2.483 ..... 2.45 ....... 2.629
19 .......... IC ........ 1.551 ..... 1.587 ..... 1.634
19 .......... ulp ....... 1.817 ..... 1.856 ..... 1.909
Table 6. HDSL2 Loss Values
(200 kHz cable loss in dB/kft at 135Ω)
Table 7. Loop Insertion Loss Data
Frequency (Hz) Maximum Loss (dB)
3,000 ............................ 12.00
10,000 ............................ 15.00
50,000 ............................ 25.50
100,000 ............................ 30.00
150,000 ............................ 32.75
200,000 ............................ 32.25
250,000 .............................37.50
325,000 ............................ 42.00
Figure 19. HDSL2 Deployment Guidelines
0
12
11
10
9
8
7
6
5
4
3
2
1
0
1234
WORKING LENGTH OF 26 GAUGE CABLE (KFT)
WORKING LENGTH OF 24 GAUGE (OR COARSER) CABLE (KFT)
56789
2.5 2.0 1.5 1.0 0.5 0.0
TOTAL
BRIDGED
TAP
LENGTH
(KFT)
VALID CABLE LENGTHS
INVALID CABLE LENGTHS

16 61222024L6-5, Issue 1 61222024L6-5A
7. TROUBLESHOOTING PROCEDURES
Use Table 8 to troubleshoot the ADTRAN H2TU-R.
8. MAINTENANCE
The ADTRAN H2TU-R requires no routine
maintenance. In case of equipment malfunction, use
the faceplate Bantam jack connector 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 the
ADTRAN Customer And roduct Support (CA S)
Department.
9. PRODUCT SPECIFICATIONS
Table 9 lists the H2TU-R specifications.
10. WARRANTY AND CUSTOMER SERVICE
ADTRAN will replace or repair this product within
ten (10) years from the date of shipment if it does not
meet its published specifications or fails while in
service. (See ADTRAN U.S. and Canada Carrier
Networks Equipment Warranty, document
60000087-10).
Contact Customer and roduct Service (CA S) prior
to returning equipment to ADTRAN.
For service, CA S requests, or further information,
contact one of the following numbers:
ADTRAN Sales
ricing and availability
[phone]
ADTRAN Technical Support
re-sales Applications/ ost-sales Technical Assistance
[phone]
Standard support hours:
Monday-Friday, 7 a.m. - 7 p.m. CST
Emergency support: 7 days/week, 24 hours/day
ADTRAN Repair/CAPS
Return for repair/upgrade
[phone]
Repair and Return Address:
ADTRAN, Inc.
CA S
901 Explorer Boulevard
Huntsville, Alabama 35806-2807
Table 8. Troubleshooting Guide
Solution
1. Make sure the H2TU-R is properly seated in the housing.
2. Verify that an adequate local power source is being used.
3. If Steps 1 and 2 pass, replace the H2TU-R.
1. Verify that the loop conforms with CSA guidelines (not too long, etc.).
2. Verify that loop loss at 196 kHz is not greater than 35 dB.
3. Verify that noise on the HDSL2 loop is within acceptable limits
(see section 6).
4. If Steps 1 through 3 pass and loop sync is still not available, replace the unit
with one known to be in proper working condition.
Condition
All front panel indicators are
off.
ower is present and adequate,
but loop sync is not available
(DSL LED is off).

1761222024L6-5, Issue 161222024L6-5A
Table 9. ADTRAN T200 H2TU-R Specifications
Loop Interface
Modulation Type............................... 16-TC AM
Mode ................................................. Full Duplex, artially Overlapped, Echo Cancelling
Number of airs ................................ One
Bit Rate ............................................. 1.552 mpbs
Baud Rate .......................................... 517.333k baud
Service Range ................................... Defined by Carrier Service Area Guidelines
Loop Loss.......................................... 35 dB maximum @ 196 kHz
Bridged Taps ..................................... Single Taps < 2 kft, Total Taps < 2.5 kft
erformance ...................................... Compliant with ANSI T1.418-2000 (HDSL2 Standard)
Return Loss ....................................... 12 dB (50 kHz to 200 kHz)
Input Impedance................................ 135 Ω
H2TU-C Tx wr (Data) Level .......... 16.6 + 0.5 dBm (0 to 450 kHz)
H2TU-C Tx wr (ACT) Level ......... 16.3 + 0.5 dBm (0 to 350 kHz)
Maximum Loop Resistance .............. 900 Ω per span
Customer Interface
DS1 (T1.403-compatible) (ITU-T I.431 compliant)
DS1 Signal Output Level .................. 0 or -15 dB
DS1 Input Signal Level .................... 0 to -22.5 dB
DS1 Line Coding .............................. AMI, B8ZS
DS1 Framing Format ........................ SF, ESF, Unframed
Po er
Maximum Heat dissipation (local power)...3.0 Watts
Clock Sources
Clock Sources ................................... Internal, HDSL2 Loop Derived
Internal Clock Accuracy ................... ± 25 ppm, (exceeds Stratum 4). Meets T1.101 timing requirements.
Tests
Diagnostics ........................................ Loopback (H2TU-R), initiated with HDSL2 in-band codes, initiated with
T1 NIU in-band codes, initiated with H2TU-C command, initiated
manually, H2TU-R control port. Self-Test.
Physical
Dimensions ....................................... 5.5 in. High, 0.7 in. Wide, 6.0 in. Deep
Weight ............................................... < Approximately 6 oz.
Environment
Temperature ...................................... Operating (Standard): -40°C to +70°C; Storage: -40°C to +85°C
Relative Humidity ............................. Up to 95 percent noncondensing
Compliance
UL Listed
Bellcore NEBS Level 3 (SR-3580)
FCC 47CFR art 15, Class A
Part Number
H2TU-R T200 MON ........................ 1222024L6

18 61222024L6-5, Issue 1 61222024L6-5A

A-1Section 61222024L6-5, Issue 161222024L6-5A
HDSL2 MAINTENANCE MODES
This appendix describes operation of the HDSL2
system with regard to detection of in-band and ESF
facility data link loopback codes. The operation of
the loopback commands in the ADTRAN HDSL2
system is compliant with the recommendation to
ANSI recorded in T1E1.4/92. The HDSL2 network
loopback points described below are shown in
Figures A-1 and A-2.
H2TU-C Loopback: A regenerative loopback of the
DSX-1 signal toward the network.
H2TU-R Loopback: A regenerative loopback of the
DS1 signal toward the network. This loopback is in
Appendix A
HDSL2 Loopbacks
addition to a separate Smartjack loopback. Separate
activation sequences are provided for the H2TU-R and
the Smartjack loopback initiation.
Upon deactivation of a loopback, the HDSL2 system
will synchronize automatically.
Figure A-1. HDSL2 Loopback Points
Figure A-2. HDSL2 Element State Diagram
H2TU-C H2TU-R
DSX-1
Interface
HDSL2
Loop DS1
Interface
NIU

A-2 Section 61222024L6-5, Issue 1 61222024L6-5A
Loopback Process Description
In general, the loopback process for the HDSL2
system elements is modeled on the corresponding
DS1 system process. Specifically, the H2TU-C
loopback is similar to an Intelligent Office Repeater
loopback and the H2TU-R loopbacks are similar to an
inline T1 Repeater loopback.
Each HDSL2 system element is independently
described by the state diagram shown in Figure A-2.
The four states are disarmed, loop up, armed, and loop
up/time out disable.
State transitions result from in-band and ESF Data
Link sequences as well as time out operations. The
sequences and time out values are as follows:
1. Arming Sequence (In-band and ESF)
2. Activation Sequence
3. Deactivation Sequence
4. Disarming Sequence (In-band and ESF)
5. Loop up Time out
6. Arming Time out
In-band control code sequences are transmitted over
the DS1 link by either the unframed or overwrite
method. The HDSL2 elements respond to either
method.
The unframed method produces periodic control
sequences and the normal DS1 framing bit is omitted.
The overwrite method produces periodic control
sequences. However, once per frame, the framing bit
overwrites one of the bits in the control sequence.
The unit can detect the loopback activation or
deactivation code sequence only if an error rate of
1E-03 or better is present.
States and State Transitions
A summary of time out and control sequences is given
in Table A-1.
NOTE
In all control code sequences presented, the
inband codes are shown left-most bit transmitted
first, and the ESF data link codes with right-
most bit transmitted first.
The Disarmed State is the normal mode of operation.
Each HDSL2 element is transparent to the data flow.
However, the in-band data flow and the ESF data link
are monitored for the arming sequence.
The in-band control code sequence used to
simultaneously arm the loopback capability of all of
the HDSL2 elements is the following 5-bit pattern:
Arm Sequence ............................ 11000
Note that this sequence is the standard NIU loop up
code. If the NIU loopback feature for the HDSL2
circuit is enabled (see H2TU-C Switch Options), the
arming sequence will activate the NIU loopback in the
H2TU-R. If the NIU loopback feature is disabled and
an external Smartjack NIU is present, the HDSL2
arming process will not interfere with NIU detection
of the loop up code.
All other in-band sequences are ignored in the
disarmed state.
The ESF Data Link sequence used to simultaneously
arm the loopback capability of all of the HDSL2
elements is the following 16-bit pattern ESF data link
sequence:
ESF Arm Sequence .................... 0001 0010 1111 1111
for four repetitions
HDSL2 element arming and NIU loop up is performed
as described for the in-band arming sequence.
All other ESF patterns are ignored in the disarmed
state.
In the Armed State, the HDSL2 system element
continues to be transparent to the data flow. However,
the in-band data flow and ESF data link is monitored
for disarming and activation codes. An arming time
out value causes the automatic return of the HDSL2
element to the disarmed state.
Transition from Armed to Loop Up State: An
in-band control code sequence is used to command a
specific HDSL2 element to move from the armed state
into the loop up state. Each HDSL2 element has a
unique 16-bit activation control code sequence as
shown in the following example.
H2TU-C Activation Sequence .. 1101 0011 1101 0011
H2TU-R Activation Sequence .. 1100 0111 0100 0010