AT Command Set

9.1.4 Summary of Unsolicited Result Codes (URC)

A URC is a report message sent from the ME to the TE. An unsolicited result code can either be deliv- ered automatically when an event occurs or as a result of a query the ME received before. However, a URC is not issued as a direct response to an executed AT command.

When sending a URC the ME activates its Ring Line (Logic "1"), i.e. the line goes active low for 1 sec- ond.

Typical URCs may be information about incoming calls, received SMS, changing temperature, status of the battery etc. A summary of all URCs is listed below.

For each of these messages, you can configure the ME whether or not to send an unsolicited result code. Remember that the presentation mode of URCs will be reset to the default values

•when you power down the GSM engine, e.g. with AT^SMSO or when disconnecting power supply,

•when you reset the engine with AT+CFUN=1,1

•when you restore the factory settings with AT&F.

To take advantage of the messages, you need to activate the desired URC every time you reboot the GSM engine or have the parameters included in the user profile saved with AT&W. If you do so, take into account that the two URCs ^SBC and ^SCTM cannot be saved with the user profile and, thus, need to be reactivated when needed after reboot.

The URCs SYSSTART, SYSSTART CHARGE-ONLY MODE and SYSSTART ALARM MODE are not user definable.

Message

+CCCM: <ccm>

+CREG: <stat>[,<lac>,<ci>]

+CRING: <type>

+CLIP: <number>, <type>

+CMTI:<mem>,<index>

+CMT:,<length><CR><LF><pdu>

+CMT:<oa>,,<scts>[,<tooa>,<fo>,

<pid>,<dcs>,<sca>,<tosca>,

<length>]<CR><LF><data>

+CBM:<sn>,<mid>,<dcs>,<page>, <pages><CR> <LF><data>

+CBM: <length><CR><LF><pdu>

+CDS: <length><CR><LF><pdu>

+CDS: <fo>,<mr>,[<ra>],[<tora>], <scts>,<dt>, <st>

+CDSI: <mem>,<index>

+CSSI: <code1>

+CSSU: <code2>

^SMGO: <mode>

^SCKS: <m>

Meaning

Current call meter value

Registration to ME network changed

Indication of an incoming call

Telephone number of caller

Indication of a new short message (text and PDU mode)

Short message is output directly to the TE (in PDU mode)

Short message is output directly to the TE (in text mode)

Cell broadcast message is output directly to the TE (in text mode)

Cell broadcast message is output directly to the TE (in PDU mode)

SMS status report routed directly to TE (in PDU mode)

SMS status report routed directly to TE (in text mode)

SMS status report routed ME/TA. Can be queried from the memory with location index number (text and PDU mode)

Supplementary service intermedi- ate/unsolicited result code

SMS overflow indicator

Indicates whether card has been re- moved or inserted

How to activate

URC

AT^CACM=1

AT+CREG=1 or AT+CREG=2

AT+CRC=1

AT+CLIP=1

AT+CNMI=1,1

Example:

AT+CNMI=1,2

Example:

AT+CNMI=1,2

Example:

AT+CNMI=1,0,2

Examples:

AT+CNMI=1,0,2

Example:

AT+CNMI=1,0,0,1

Example:

AT+CNMI=1,0,0,2

AT+CSSN=1,1

AT^SMGO=1

AT^SCKS=1

MC35_ATC_01_V04.00

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Siemens MC35 manual Summary of Unsolicited Result Codes URC, Message, How to activate
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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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