Product Description
The Intel
LXT3108 is an octal 3.3V long-haul/
short-haul T1/E1/J1 Line Interface Unit (LIU).
The LXT3108 LIU allows the design of T1/E1/J1
multi-service cards with T1/E1/J1 switchability
and a single bill-of-material. Intel's proven robust
design makes the LXT3108 LIU the ideal device
for high-density T1/E1/J1 applications.
To increase network reliability, Intel's LXT3108
incorporates a DSP-based architecture with
features such as Intel
Hitless Protection
Switching (Intel
HPS) and an Arbitrary Transmit
Waveform Generator (ATWG). The DSP-based
architecture is less sensitive to power supply
and temperature variations and allows the LIU
to adapt to varying line conditions. Intel
HPS
allows the design of 1+1 redundant cards
without the use of relays as well as the ability
to switch from one card to another without
a loss of frame synchronization. ATWG allows
the transmitter to shape the output wave-form
using the Intel
Pulse Template Matching
(Intel
PTM) software to meet varying board
conditions, without the need to change any
external components.
The Intel LXT3108 supports both twisted-pair
and coaxial cable applications, offering line build
outs and pulse shaping for all T1, E1, and J1
applications. The LXT3108 is programmed
through an 8-bit microprocessor bus that
supports both Intel and Motorola* micro
processors, including multiplexed and non-
multiplexed busses.
The Intel LXT3108 LIU incorporates a crystal-
less digital jitter attenuator that can be placed
in either the receive or transmit signal paths,
B8ZS/HDB3 encoders and decoders, and
selectable unipolar or bipolar I/O modes.
Intel
LXT3108
Octal 3.3V Long-haul/Short-haul T1/E1/J1 Line Interface Unit
product brief
Key Applications
s
Integrated Multi-service Access Platforms
(IMAPs)
s
Integrated Access Devices (IADs)
s
Inverse Multiplexing for ATM (IMA)
s
ATM Gateways
s
Wireless Base Stations
s
Routers
s
Frame Relay Access Devices, CSU/DSU
s
Voice Gateways
Support Collateral
s
LXT3108 LIU Data Sheet
s
LXT3108 Demonstration Board
and Users Guide
s
Design Assistant will include:
Reference designs
Schematics, Gerber Files, Bill of Materials
Application notes, FAQs, Data Sheet
GUI, Device Drivers, API
Intel
Internet Exchange
Architecture
#2-8
1
TTIP
RTIP
DB7..0
AD7..0
RRING
TRING
RPOS
RNEG
RCLK
LOS
MCLK
TPOS
TNEG
TCLK
Clock
Recovery
LOS
Analog Lopback
Digital Lopback
Remote Lopback
Pulse
Shaper
B8ZS/HDB3
Decoder
Jitter
Attenuator
RX or TX
Path
Jitter
Attenuator
RX or TX
Path
B8ZS/HDB3
Encoder
Line
Driver
Equalizer
LXT3108 LIU Block Diagram
CLAD
P
Interface
JTAG
UNITED STATES AND CANADA
Intel Corporation
Robert Noyce Bldg.
2200 Mission College Blvd.
P.O. Box 58119
Santa Clara, CA 95052-8119
USA
EUROPE
Intel Corporation (UK) Ltd.
Pipers Way
Swindon
Wiltshire SN3 1RJ
UK
ASIA-PACIFIC
Intel Semiconductor Ltd.
32/F Two Pacific Place
88 Queensway, Central
Hong Kong
JAPAN
Intel Japan (Tsukuba HQ)
5-6
Tokodai Tsukuba-shi
300-2635 Ibaraki-ken
Japan
SOUTH AMERICA
Intel Semicondutores do Brasil Ltda
Av. Dr. Chucri Zaidan, 940-10 andar
04583-904 So Paulo, SP
Brazil
CPE/IAD
CPE/IAD
CPE/IAD
CPE/IAD
T1/E1
T1/E1
T1/E1
T1/E1
IMAP
IMA
n
T1/E1
DS3/OC-x
OC-x
VOICE
GATEWAY
GR303/TR08/V5
T1/E1 Links
Class 5
Switch
PSTN
Trunks
LXT3108 in a Voice
Gateway Application
Voice/Phones
Data/Computer
Packet
Network
0100110
0110101
Intel
Octal 3.3v
SH/LH
T1/E1/J1
LIU
Intel
Octal 3.3v
T1/E1/J1
Framer
2001 Intel Corporation
Order Number: 249083-001 Printed in USA/0501/5K/MG/DC
Intel is a trademark or registered trademark of Intel Corporation or its subsidiaries in the United States and other countries.
Information in this document is provided in connection with Intel products. No license, express or implied, by estoppel or otherwise,
to any intellectual property rights is granted by this document. Except as provided in Intel's Terms and Conditions of Sale for such
products, Intel assumes no liability whatsoever, and Intel disclaims any express or implied warranty, relating to sale and/or use of
Intel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any
patent, copyright, or other intellectual property right. Intel products are not intended for use in medical, life saving or life sustaining
applications. Intel may make changes to specifications and product descriptions at any time, without notice.
Designers must not rely on the absence or characteristics of any features or instructions marked "reserved" or "undefined."
Intel reserves these for future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from
future changes to them.
* Other names and brands may be claimed as the property of others.
Intel
Internet Exchange Architecture
Intel
Internet Exchange Architecture is an end-to-end family of high-performance, flexible and scalable hardware and
software development building blocks designed to meet the growing performance requirements of today's networks.
Based on programmable silicon and software building blocks, Intel
IXA solutions enable faster development, more
cost-effective deployment and future upgradability of network and communications systems. Additional information can
be found at www.intel.com/IXA
s
Design of multi-service platforms with one bill-of-material
and one card for LH/SH T1/E1/J1 designs
s
Less sensitive to power supply and temperature
variations, and more immune to ground and power
noise. Handles difficult circuits in real world applications
and allows Intel
PTM software to adjust the output
pulse to meet the pulse template mask, without having
to change any external components
s
Allows design of redundant cards ensuring high system
reliability without the use of relays
s
Helps eliminate the need for multiple crystals/clocks
s
Provides convenient performance monitoring without
external components
s
Accelerates system development
s
T1/E1/J1 selectability
s
Adaptive DSP
s
Intel
Hitless Protection Switching (Intel
HPS)
s
One master clock for T1, J1, and E1 operation
s
16-bit BPV and Excess Zero counters
s
Software for GUI and Intel PTM
Features
Benefits
Intel Access
Developer's Site
http://developer.intel.com
Intel
Internet Exchange Architecture Home Page
http://www.intel.com/IXA
Networking Components Home Page
http://developer.intel.com/design/network
Other Intel Support:
http://developer.intel.com/design/litcentr
Intel Literature Center
(800) 548-4725 7 a.m. to 7 p.m. CST (U.S. and Canada)
International locations please contact your local sales office.
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