Data Mode AT COMMANDS

Table 17. Resulting Modem-to-Modem Connection Rates with Non-Default Values

Originating Modem

Answering Modem

Resulting Connection Speed

 

 

 

+MS = V34, 1, 0, 0, 0,

+MS = V32, 1, 0, 9600,

9600 bps: the originating modem is configured to attempt

0;

0, 0;

a maximum 28,800 bps connection, but the answering

the UART data rate =

the UART data rate =

modem is configured to attempt a maximum data rate of

115,200 bps

14,400 bps

9600 bps.

 

 

 

+MS = V34, 0, 33,600,

+MS = V32B, 1, 0,

No connection: the originating modem is configured to

33,600, 0, 0;

9600, 0, 0;

attempt only a 33,600 bps connection, but the answering

UART data rate =

B1 and UART data rate

modem is configured to attempt a maximum data rate of

115,200 bps

= 14,400 bps

9600 bps.

 

 

 

+MS = V32,

 

9600 bps: the originating modem is configured to attempt

+MS = V34, 1, 0,0, 0, 0;

connection at between 7200 to 9600 bps or below. The

1, 7200, 9600, 0, 0;

UART data rate =

answering modem is configured to attempt a data rate of

and UART data rate =

9600 bps

9600 bps or below. The connection takes place at

7200 bps

 

7200 bps, the highest speed supported by both modems.

 

 

 

 

 

3.9Diagnostic Testing [S18, &Tn]

The &Tn command initiates loopback tests. Setting S-register S18 to a non-zero value determines the length of testing after the modem receives the &Tn command. After the testing period elapses, the modem halts the test and returns to command mode. To abort the test before the test timer has timed out, enter the escape code sequence followed by AT&T0. Setting S18 to an ’0’disables the test timer. In this case, the loopback test continues to run until an escape code, followed by AT&T0 (or ATH), is sent to the modem.

The modem provides a local analog loopback test (see Section 3.9.1, “Local Analog Loopback [AT&T1]” on page 36) for testing modem-to-modem integrity in all modes except V.90 and V.92. After entering the loopback mode, the communication integrity is checked by the DTE sending data to the modem and then checking the looped-back data for errors. In addition, in the self-test mode the modem implements an internal data pattern generator and checker that detects errors. When a data error occurs in self-test mode, the modem increments an internal error counter. Upon completing the test, the modem sends a three-digit error count to the DTE. These tests are illustrated in the following examples.

3.9.1Local Analog Loopback [AT&T1]

This test is used by the local DTE to check the DTE-to-modem communication integrity. The local DTE will not initiate the test from online command mode.

36

536EX Chipset Developer’s Manual

Intel Confidential

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Intel 537EX manual Diagnostic Testing S18, &Tn, Local Analog Loopback AT&T1
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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.
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