3 AT+CGDATA Enter data state, At+Cgdata=?, L2P

AT Command Set

6.1.3 AT+CGDATA Enter data state

Test command

AT+CGDATA=?

The test command is used for requesting information on the supported layer 2 protocols to be used between the TE and MT.

Response

+CGDATA: (list of supported <L2P>s)

OK/ERROR/+CME ERROR

Parameter
<L2P>	See write command

Write command

+CGDATA=[<L2P>,

[<cid>[,<cid>,…]]]]

The execution command causes the MT to perform whatever actions are nec- essary to establish communication between the TE and the network using one or more GPRS PDP types. This may include performing a GPRS attach and one or more PDP context activations. Commands following +CGDATA com- mand in the AT command line shall not be processed by the MT.

Parameter
<L2P>	layer 2 protocol to be used between the TE and MT
	PPP or 1 for layer2 protocol PPP
<cid>	PDP Context Identifier is a numeric parameter which
	specifies a particular PDP context definition. The pa-
	rameter is local to the TE-MT interface and is used in
	PDP context-related commands. If no context is specified,
	an internal context 0 with default QoS (network sub-
	scribed) and APN from EEPROM (if there is one) is used.
	1
	2

Response

If successful, the MT issues the intermediate result code CONNECT and en- ters V.25ter online data state:

CONNECT

After data transfer is complete, and the layer 2 protocol termination procedure has completed successfully, the command state is re-entered and the MT re- turns the final result code

If the <L2P> parameter value is unacceptable to the MT, the MT returns an ERROR or +CME ERROR response:

ERROR/+CME ERROR

In the event of erroneous termination or a failure to start up, the command state is re-entered and the MT returns

NO CARRIER

or, if enabled,

+CME ERROR

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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.

Siemens MC35 manual 3 AT+CGDATA Enter data state, At+Cgdata=?, +CGDATA=L2P

Models: MC35