Error Correction and Data Compression

Table 21. V.44/V.42/V.42 bis and MNP Data Modem Command Descriptions (Continued)

Command

Default

 

 

 

Description

 

 

 

 

 

Data Compression Reporting: Controls whether the “+DR:” result code is transmitted from the DCE to

 

 

DTE once a connection with has been made. If enabled the result code displayed shall represent the

 

 

current negotiated DCE-DCE data compression type and is issued after the Error Control Report (+ER)

 

 

and before the final result code CONNECT. +DR accepts one numeric parameter decimal value and the

 

 

format is as follows:

 

 

 

 

0

Disables Data compression reporting—No +DR result code transmitted

 

 

1

Enables Data compression reporting—+DR result code transmitted

+DR=m

0

 

 

 

 

 

 

Display messages when +DR = 1,

 

 

+DR: NONE

 

Data compression not in use

 

 

+DR: V42B

 

V.42 bis is in use in both directions

 

 

+DR: V42B RD

V.42 bis is in use in receive direction only

 

 

+DR: V42B TD

V.42 bis is in use in transmit direction only

 

 

+DR: MNP5

 

MNP5 in use

 

 

 

 

 

 

Data Compression: This command sets multiple parameters for the control of data compression.

 

 

m = <direction>, <compression negotiation>, <max dict>, <max string> Default: m = 3, 0, 2048, 6

 

 

<direction>

Specifies the direction of the data compression from the DTEs point of view.

 

 

Range: <direction> = 0–3

 

 

 

Default: <direction> = 3

 

 

 

<direction> = 0

Negotiated, no compression

 

 

<direction> = 1

Transmit only

 

 

<direction> = 2

Receive only

 

 

 

<direction> = 3*

Both directions, accept any direction

 

 

<compression negotiation>Specifies whether the modem should stay connected or disconnect based

+DS=m

see ‘m’

on the desired result.

 

 

 

Range: <compression negotiation> = 0, 1

 

 

Default: <compression negotiation> = 0

 

 

<compression negotiation> = 0*

Do not disconnect

 

 

<compression negotiation> = 1

Disconnect

 

 

<max dictionary> Specifies the maximum number of dictionary entries that should be negotiated.

 

 

Range: <max dictionary> = 512 to 65535

 

 

Default: <max dictionary> = 2048

 

 

 

<max string>

Specifies the maximum string length to be negotiated.

 

 

Range: <max string> = 6–250

 

 

 

Default: <max string> = 6

 

 

 

 

NOTE: An asterisk (*) denotes the factory-default setting.

 

 

 

 

 

 

60

536EX Chipset Developer’s Manual

Intel Confidential

Page 59 Page 61
Page 60
Image 60
Intel 537EX manual +DR=m, Direction, +DS=m, Max string
Page 59 Page 61

537EX specifications

The Intel 537EX is a powerful and innovative embedded processor designed for a range of applications, particularly in the fields of industrial automation, telecommunications, and transport management systems. This processor is a member of Intel's embedded product line, tailored specifically to meet the demands of systems that require high reliability and long lifecycle support.

One of the main features of the Intel 537EX is its multi-core architecture, which enables efficient parallel processing capabilities. This allows for the execution of multiple tasks simultaneously, significantly improving overall system performance. The processor also incorporates Intel’s advanced power management technology, which ensures that the device consumes energy efficiently, enhances thermal performance, and prolongs the lifespan of the system.

The Intel 537EX supports a range of connectivity options, including high-speed Ethernet and Serial ATA interfaces. This ensures that it can easily integrate into existing systems, seamlessly supporting applications that require robust data transfer capabilities. Additionally, the processor is equipped with multiple I/O ports, facilitating the connection of various peripherals and sensors, which is crucial in industrial applications.

One of the standout technologies within the Intel 537EX is its support for hardware virtualization. This feature allows for the creation of multiple virtual environments within a single physical structure, optimizing resource utilization and enhancing system flexibility. Additionally, Intel’s integrated security technologies provide a significant layer of protection against potential threats, ensuring that embedded systems remain secure.

Another characteristic of the Intel 537EX is its extensive software support, which includes compatibility with various operating systems and development environments. This versatility makes it an attractive choice for developers looking to build or upgrade their embedded systems. With access to Intel's comprehensive software tools, developers can quickly optimize applications to take full advantage of the processor's capabilities.

The Intel 537EX also boasts excellent thermal performance, allowing it to operate efficiently in harsh environments. This is crucial for embedded applications in industrial settings where temperature fluctuations are common. Overall, the Intel 537EX is engineered to deliver high-performance processing power, superior connectivity, and enhanced security, solidifying its position as a reliable choice for demanding embedded applications.
Top Page Image Contents