Product specifications

4 Issue 1, November 2003 61181113L2-5A
Powering Modes
The H2TU-C is capable of span powering the H2TU-R
by applying current to the local loop. From 10 to 150
mA of current is coupled onto the HDSL2 span to power
the H2TU-R when deployed. (See Figure 4.)
If there is a need to remove an H2TU-C from the Total
Access shelf, the H2TU-C should be provisioned for the
Out-Of-Service-Maintenance or Out-Of-Service-
Unassigned state. This will disable all HDSL2 level
alarms from being sent to the shelf. Any HDSL2 alarm
that occurred prior to changing the service will be set to
Inactive status when the H2TU-C card is removed from
the shelf.
Figure 4. H2TU-C Span Powering Diagram
H2TU-C Alarm Outputs
Pin 32 of the H2TU-C edge connector interface
provides a fuse alarm signal that connects –48 VDC to
this pin in the presence of a blown fuse. This indicates
the card has malfunctioned and should be replaced.
4. INSTALLATION
After unpacking the HDSL2 unit, inspect it for damage.
If damage has occurred, file a claim with the carrier,
then contact ADTRAN Customer Service. Refer to the
Warranty and Customer Service section for further
information. If possible, keep the original shipping
container for returning the Total Access 3000 H2TU-C
for repair or for verification of shipping damage.
CAUTION
Electronic modules can be damaged by
Electro-Static Discharge (ESD). When
handling modules, wear an antistatic discharge
wrist strap to prevent damage to electronic
components. Place modules in antistatic
packing material when transporting or storing.
When working on modules, always place them
on an approved antistatic mat that is electri-
cally grounded.
There are no configuration switches for the Total
Access 3000 H2TU-C. Configuration is performed via
software discussed in the SCU Control Port Operation-
HDSL2 section of this practice.
The Total Access 3000 H2TU-C plugs directly into the
Total Access 3000 shelf. No installation wiring is
required.
Powering Options
The H2TU-C is default enabled for span powering
mode. The H2TU-C will power the H2TU-R, but it can
be set to disable span power when the H2TU-R is being
locally powered.
CAUTION
Disabling the span power removes all voltage
from the HDSL2 loop. This will result in an
absence of sealing current which could have an
adverse effect on circuit continuity over an
extended period of time.
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 appli-
cable UL standards.
HDSL2
TIP (+)
RING (-
)
SPAN POWER
190 V
SPAN CURRENT
C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.