AT Command Set

Reference

GSM 07.07, GSM 02.04, GSM 02.82

<class> integer or sum of integers each representing a <class> of informa- tion:

1voice

2data

4fax

8short message service

16 data circuit sync

32 data circuit async

64 dedicated packet access

128 dedicated PAD access

xcombination of some of the above classes.

For example, the default setting 7 represents the sum of the integers 1, 2 and 4 (CF for voice, data and fax). The value 255 covers all classes. If the <class> parameter is omitted, the default value 7 is used.

<time> time to wait before call is forwarded, rounded to a multiple of 5 sec.. 1...20..30 (only for <reas>=no reply)

<status> 0 not active 1 active

Note

•Please note that you can register, disable, enable and erase <reas>

4 and 5 as described above. However, it is not possible to query the status of <reas> 4 and 5 with AT+CCFC. Instead, you may use the the ATD command followed by *'# codes to check the status of these two reasons. See Chapter 9.4 for a complete list of *# GSM codes. See also examples below.

•The AT+CCFC command offers a broad range of call forwarding options according to the GSM specifications. However, when you attempt to set a call forwarding option which is not provisioned or not yet subscribed to, the setting will not take effect regardless of the response returned. The re- sponses in these cases vary with the network (for example “OK”, “Opera- tion not allowed”, “Operation not supported” etc.). To make sure check the the call forwarding status with <mode>=2.

4.6.1 Examples: Call forwarding

Please note that when you configure or query call forwarding without specifying any classes, the set- tings will refer to classes 1, 2 and 4 only (=default). The handling of classes is equivalent to AT+CLCK (Chapter 4.21.3).

Example 1

Example 2

To register the destination number for unconditional call forwarding (CFU):

at+ccfc=0,3,"+493012345678",145

OK

Remember that call forwarding will be activated for voice, data and fax (de- fault classes) when you register the destination number.

To query the status of CFU without specifying <class>:

at+ccfc=0,2

+CCFC: 1,1,"+493012345678",145

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Siemens MC35 manual Examples Call forwarding, At+ccfc=0,3,+493012345678,145
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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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