Fax Mode Command Descriptions, +Fclass? | Intel 537EX specification

Fax Class 1 AT Commands

The ATDT <telephone number> command string causes the modem to originate a fax call. After dialing the telephone number, the modem sends out a calling tone (1100 Hz), recognizes the remote fax modem answer tone, and looks for the remote fax HDLC flags at 300 bps. If the HDLC flags are detected, the modem sends the DTE a ‘CONNECT’ message followed by the Class 1 HDLC frame information. If the HDLC flags are not detected within the time limit defined by S-register S7, the modem sends a ‘NO CARRIER’ message to the DTE and then hangs up the line. If the modem hangs up the line while processing the ATD command (that is, while the modem is on- hook), the modem responds back with an ‘ERROR’ message whenever the DTE issues one of the data stream AT commands.

The ATA command causes the modem to answer a fax call. After going off-hook, the modem sends the answer tone followed by HDLC flags. The modem then sends a ‘CONNECT’ message to the DTE and waits to receive the HDLC frame information from the DTE. In general, the ATA command performs three functions:

1.It places the modem off-hook.

2.It causes the modem to transmit the answer tone.

3.It causes the modem to act as if it received an AT+FTH=3 command from the DTE.

The following data mode and voice mode AT commands are supported in fax mode:

Data: All

Voice: +FCLASS, +VDR, +VNH, +VIP, and + VCID

Table 24. Fax Mode Command Descriptions

Command	Default		Description

		Fax Mode Selection: This command is used to select a fax class, indicate current fax
		class mode setting, and indicate supported fax classes. All fax mode commands,
		except for +FCLASS, are valid only in fax mode.
		+FCLASS?	Indicates current fax class selection
		+FCLASS = ? Indicates supported fax classes
+FCLASS	0	+FCLASS = n	Configures DCE for selected fax class. The modem
=1	0		responds back with an ‘OK’ message at the same
=1			responds back with an ‘OK’ message at the same
			DTE-to-modem data rate used to issue this command
		Range: 0, 1, 8
		n = 0*	Configures DCE for data modem operation
		n = 1	Configures DCE for fax Class 1 modem operation
		n = 8	Configures DCE for IS-101 voice mode

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

536EX Chipset Developer’s Manual

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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.

Intel 537EX manual Fax Mode Command Descriptions, +Fclass?

Models: 537EX

Table 24. Fax Mode Command Descriptions

Command

+FCLASS?

+FCLASS

Intel Confidential

537EX specifications