Adtran H2TU-R Leaflet

For more information, refer to the Installation and Maintenance Practice (P/N 61181126L2-5) available online at 

©2007 ADTRAN, Inc. 

All Rights Reserved.

P/N: 1181126L2

CLEI: SIIA410F_ _

*61181

126L2-2

2A*

The Total Access 3000/3010 shelf must have an Enhanced System Controller Unit 
(SCU). All provisioning, performance monitoring, and loopbacks are accessed through 
the SCU. The SCU has a faceplate-mounted DB-9 connector that supplies an RS-232 

interface for connection to a VT100 or compatible controlling terminal. Set the terminal 
communication to 9600 bps, 8 data bits, no parity, and 1 stop bit.

1. At the Total Access 3000/3010 Login screen, enter the account name and password.
2. Select 

Access Modules

 from the Total Access Main Menu.

3. Access the desired H2TU-R by selecting the corresponding slot number.

Once these steps are completed, the HDSL2 Main Menu appears.

♦

Cable pairs must be non-loaded

♦

Total bridged tap < 2.5 kft; No single bridged tap > 2 kft

♦

196 kHz insertion loss < 35 dB

♦

Pulse attenuation (loss on HDSL2 System Status screen) < 30 dB

♦

Maximum loop resistance is 900 ohms¶

♦

Impulse noises < 50 dBrn, as measured using a 50 kb filter

♦

Wideband noise 

≤ 31 dBrn, as measured using a 50 kb filter

For further information regarding deployment guidelines and applications, refer to the 

Supplemental Deployment Information for HDSL, HDSL2, and HDSL4 (HDSLx) 
document (P/N 61221HDSLL1-10).

Controls a customer loopback at the H2TU-C

Controls a bidirectional loopback at the H2TU-R

Provides an intrusive access point to the 

data stream being transmitted to (TX) 

and received from (RX), the H2TU-C.

The BRG (Bridging) jack provides 

nonintrusive access when connected to a 

bit-error rate test set that is configured 

for bridging mode. In this configuration, 

it is possible to observe sychronization, 

test patterns, and other functions.
The BRG jack can be used for intrusive 

testing toward the customer. In this 

configuration, the H2TU-R DS1 

interface must be disconnected by using 

the metallic-splitting EQ jacks. Then, a 

test set configured for terminate mode 

can be connected to the BRG jacks, 

achieving test access toward the 

customer equipment.

The ADTRAN Total Access

®

 3000/3010 HDSL2 Transceiver Unit for the Remote 

End (H2TU-R, P/N 1181126L2) is a network terminating device that can deploy an 
HDSL2 T1 circuit using 2-wire metallic facilities. The H2TU-R fits any single-slot 
shelf in the Total Access 3000/3010 chassis (P/N 1181001L1 / P/N 1182003L1). The 

H2TU-R can be deployed in circuits that use one HDSL2 Transceiver Unit for the 
Central Office (H2TU-C) and one H2R.

After unpacking the unit, inspect it for damage. If damage is noted, file a claim with 
the carrier and then contact ADTRAN. Refer to the warranty for more information.
Mount the H2TU-R in any single slot of the Total Access 3000/3010 chassis. 
Amphenol connectors on the backplane of the Total Access 3000/3010 shelf allow 
access to the DS1 and HDSL2 signals. Pins 1 and 33 of each amphenol connector 

correspond to slot 1. Pins 2 and 34 of these connectors correspond to slot 2. Pins 3 
and 35 correspond to slot 3, and so forth, up to pins 28 and 60 for slot 28.

♦

DS1 (Customer side) – Pair 7 and Pair 8

♦

HDSL2 (Network side) – Pair 2

{

z

z

z

2

Off

Red
Yellow

Green

Green Flashing

No synchronization between the H2TU-C and the H2TU-R on 

the loop
Poor signal quality on the loop (> 10-7 BER)
Marginal signal quality on the loop (. 2 dB margin above 10-7 

BER)
Good signal quality on the loop (> 2 dB margin above 10-7 

BER)
Detected error on either end of the loop

{

2

z

Off

Green Flashing
Green

Customer-side DS1 signal is absent or is in a format that does 

not match the provisioning of the HDSL2 circuit.
Detected error on the DS1 interface
Customer-side DS1 signal is present and synchronized

{

z

z

Off
Red
Yellow

No alarm condition detected
Detected local alarm condition (H2TU-R)
Detected remote alarm condition (H2TU-C)

{

z

z

Off
Yellow
Green

DS1 is provisioned for unframed operation
DS1 is provisioned for ESF framing mode
DS1 is provisioned for SF framing mode

{

z

Off
Green

DS1 is provisioned for AMI coding
DS1 is provisioned for B8ZS coding

{

z

2

Off
Yellow

Yellow Flashing

Unit is not in loopback or armed state
Active local bidirectional loopback from the H2TU-R toward 

the customer and/or the network
Unit is armed but not in active loopback condition

DSX-1

BRG

RX

H2TU-R

DATA

PUMP

DSX-1

T1

R1

DSX-1

T

R

HDSL2

EQ
RX

DSX-1

BRG

TX

EQ
TX