AT Command Set

3.22 AT+FRM Receive Data

Test command

AT+FRM=?

Write command

AT+FRM=<mod

>

Reference

TIA/EIA-578

Response

(List of supported modulation modes <mod>s) OK

Parameter

See write command

This command causes the TA to enter the receiver-mode using the modulation defined below. An ERROR response code results if this command is issued while the modem is on-hook.

Response

CONNECT

If error is related to ME functionality:

ERROR

Parameter

 

 

<mod> 96

V.29

9600 bps

72

V.29

7200 bps

48

V.27ter

4800 bps

24

V.27ter

2400 bps

Note

 

 

Used for Faxclass 1 only

3.23 AT+FRS Receive Silence

Write command

AT+FRS=<time>

Reference

TIA/EIA-578

+FRS=n causes the TA to report an OK result code to the TE after <time> 10 mil- lisecond intervals of silence have been detected on the line. This command is aborted if any character is received by the DTE. The modem discards the abort- ing character and issues an OK result code. An ERROR response code results if this command is issued while the mode is on-hook.

Response

OK

If error is related to ME functionality:

ERROR

Parameter

<time> 0 – 255 no. of 10 millisecond intervals

Note

Used for Faxclass 1 only

3.24 AT+FTH Transmit Data Using HDLC Framing

Write command

AT+FTH=<mod>

Reference

TIA/EIA-578

This command causes the TA to transmit data using HDLC protocol and the modulation mode defined below. An ERROR response code results if this com- mand is issued while the modem is on-hook.

Response

CONNECT

Parameter

<mod> 3 V.21 Ch2

300 bps

Note

Used for Faxclass 1 only

MC35_ATC_01_V04.00

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Siemens MC35 22 AT+FRM Receive Data, 23 AT+FRS Receive Silence, 24 AT+FTH Transmit Data Using Hdlc Framing, At+Frm=?, Mod
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MC35 specifications

The Siemens MC35 is a compact and versatile modem designed primarily for mobile communication, data transmission, and machine-to-machine (M2M) applications. Launched in the early 2000s, it quickly became popular due to its blend of performance, reliability, and ease of integration, making it a solid choice for developers and businesses.

One of the key features of the MC35 is its support for GSM and GPRS technologies. This allows it to connect seamlessly to various networks, enabling users to transmit data at speeds that were impressive for its time. The GPRS capability can offer data rates of up to 171.2 kbps, allowing for efficient data transfer even in areas with limited connectivity.

The MC35 is designed to support both SMS and voice functionalities, making it adaptable for a range of applications. This includes remote monitoring, telemetry, and alarm signaling. The ability to send and receive SMS messages is a significant advantage for applications that require immediate alerts and notifications, enhancing its utility in security systems and industrial automation.

Furthermore, the modem is equipped with a range of interfaces, including serial communication (RS232), which makes it compatible with various hardware devices. This facilitates easy integration into existing systems, whether for industrial machinery or consumer electronics. Additionally, it features a robust software development kit (SDK), which enables developers to create custom applications tailored to their specific requirements.

Power consumption is another notable characteristic of the Siemens MC35. It is engineered to be energy-efficient, which is especially important for battery-operated devices or systems that require a prolonged operation without frequent recharging or maintenance.

In terms of physical characteristics, the MC35 is compact and lightweight, allowing it to fit into various enclosure designs without occupying much space. Its durability ensures it can perform reliably in different environments, making it suitable for outdoor and industrial applications.

To summarize, the Siemens MC35 stands out as a reliable modem with a rich feature set that includes GSM and GPRS support, SMS and voice capabilities, easy integration through various interface options, and energy-efficient operation. Its adaptability makes it a valuable tool for a wide array of communication and data transmission tasks, solidifying its place in the evolution of mobile communications technology.
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