Product specifications

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2 Issue 1, November 2003 61181113L2-5A

Features

The basic features of the HDSL2 Total Access 3000

H2TU-C, (P/N 1181113L2) include the following:

• Auto In Service

• Bit Error Rate Testing (BERT)

• Flash Upgrade

• Troubleshooting Guidance

•TScan

These and other features will be discussed in the

practice.

The H2TU-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 turn off. The fuse is

not designed to be replaced in the field.

The H2TU-C uses a DC-to-DC converter to derive its

internal logic and span powering voltages from the

–48 VDC office supply. Span-powering voltages meet

all requirements of Class A2 voltages as specified by

Bellcore GR-1089-CORE.

System power and alarm bus connections are made

through the backplane of the Total Access shelf. DSX1

and HDSL2 signals are connected through the 64-pin

shelf connectors related to each individual slot.

TScan

This unit is equipped to support the

TScan™ feature,

which provides data retrieval and diagnostic capabil-

ities for remote management of DS1 circuits.

TScan

allows provisioning, performance, and event history

information to be retrieved by the test center via the

Facility Data Link (FDL). In addition,

TScan can be

used to determine the nature and location of faults on

DS1 trouble circuits.

TScan is accessible only through

the remote test center.

NOTE

For implementation of

TScan please contact

your local ADTRAN sales representative.

A patent-pending single-ended diagnostic routine

residing on a host server at the central test facility,

TScan issues commands and retrieves data via FDL

from the H2TU-C.

TScan performs the following functions (see Figure 2):

• Detection and location of an open, one or both

conductors

• Detection and location of a short between Tip and

Ring

• Detection and location of a ground fault from either

or both conductors

• Detection of foreign voltage

• H2TU-C Self Diagnostics

• Ability to remotely detect the presence or absence

of a ground connection in the remote mount.

TScan allows operators to integrate these capabilities

across multiple computing platforms with existing

operating systems.

Figure 2. TScan Diagnostic Capabilities

Auto In Service

The Total Access 3000 H2TU-C supports the Auto In-

Service feature that will automatically change the

service state of the line card from

Out-of-service

Maintenance (OOS-MA)

to In-Service and vice versa

based on DSL loop synchronization and/or DSX-1/DS1

alarm presence.

This and other features are discussed in more detail in

the SCU Control Port Operation-HDSL2 section.

Bit Error Rate Testing (BERT)

This Total Access HDSL2 unit has the capability to

initiate and record BERT via the Craft Access Terminal

menus. It features eight timed and user-selectable data

patterns as well as the ability to insert errors.

Compliance

Table 2 shows the compliance codes for the Total

Access 3000 H2TU-C. The Total Access 3000 H2TU-C

is NRTL listed to the applicable UL standards. The

Total Access 3000 H2TU-C is to be installed in a

restricted access location and in a Type “B” or “E”

enclosure only.

CO Outside Plant Facilities

Open on either conductor

Open on both conductors

Short between T&R

Short to ground from eith

or both conductors