CONTENTS
1. GENERAL .................................................................. 1
3. OPERATION .............................................................. 8
FIGURES
TABLES
Unit ................................................................... 5
Assignments ..................................................... 6
A. The Nx64 HTU-R can be used in a variety of environments. When using this equipment, follow these basic
safety precautions to reduce the risk of fire, electric shock and personal injury:
1. Do not use this product near water (for example, near a bathtub, washbowl, sink, or laundry tub, in
a wet basement or near a swimming pool).
2. Avoid using this or other telephone equipment (other than the cordless type) during an electrical
storm.
3. Do not use the telephone to report a gas leak in the vicinity of the leak.
4. Use only the power cord, power supply and/or batteries indicated in this document. Do not dispose
of batteries in a fire; check with local codes for possible special disposal instructions.
61245023L1-5B
T1 Nx64 HTU-R
Installation and Maintenance
1. GENERAL
Functional Overview
The ADTRAN T1 Nx64 HTU-R is a network
terminating unit which uses High-bit-rate Digital
Subscriber Line (HDSL) technology to transport T1
data over copper loops. Each loop operates over a
single pair of copper wire and carries half of the
total bandwidth along with a small amount of
overhead for maintenance and performance
monitoring functions. Figure 1 is an illustration of
the T1 Nx64 HTU-R.
The T1 Nx64 HTU-R is a standalone unit which
contains an integrated Data Service Unit (DSU).
This eliminates the need for a separate DSU. The
T1 Nx64 HTU-R provides Nx56 kbps or Nx64 kbps
data transmission capability. Possible data rates
range from 64 kbps to 1.536 Mbps and 56 kbps to
1.344 Mbps.
IMPORTANT
Section 61245023L1-5B, Issue 2
Section 61245023L1-5B
CLEI Code # T1L3DEDA_ _
T1 HTU-R
Figure 1. T1 Nx64 HTU-R
Issue 2, April 2000
1