LXP730LE Datasheet

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LXP730

Multi-Rate DSL Framer

Datasheet

The LXP730 is a multi-purpose Digital Subscriber Line (DSL) framer which complements the

Level One SK70725/21 Enhanced MDSL Data Pump (EMDP) to provide seamless transport of

data and voice signals over one or more DSL datapaths.

Applications

The LXP730 in combination with the EMDP

chipset is optimized for use as a framer or I/O

interface device for the following applications:

s

Digital Pair Gain Systems

s

Ethernet Modems

s

s

s

s

T1/E1 Fractional Transport Systems

Videoconferencing Systems

Simultaneous Data - Voice Transport

Systems

Wireless Base Station Access Systems

Product Features

The LXP730 provides the basic functions

required of a DSL framer:

s

Synchronization of external data streams to

the DSL line

s

Multiplexing and demultiplexing of

independent data streams for voice and data

s

Loopback of payload data at the DSL

interface

s

Creation, insertion, and recovery of the

MDSL Overhead (MOH) structure,

performance monitoring, and message

transport required in a DSL system with a

capacity of up to 32 kbps

s

s

s

s

Supports two input/output data streams

simultaneously

鈥?Slave mode: external clock determines

the rate at which data will be transferred

to and from the framer

鈥?Master mode: clock derived from

received DSL clock or external

oscillator

Single part architecture allows one chip to

be used economically in both central and

remote locations

Supports systems with point-to-point

architectures

Alternate Hardware Control mode (HWC)

for operation without an external

microprocessor

As of January 15, 2001, this document replaces the Level One document

LXP730 Multi-Rate DSL Framer Datasheet.

Order Number: 249266-001

January 2001

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