AT Command Set

4.48 AT+CUSD Unstructured supplementary service data

Test command

AT+CUSD=?

Read command

AT+ CUSD?

Write command

AT+ CUSD= <n>[,<str>[,<dcs>]]

Reference

GSM 07.07

Response

+CUSD: (list of supported <n>s) OK

Parameter

See write command

Response

TA returns the current <n> value.

+CUSD: <n> OK

If error is related to ME functionality:

+CME ERROR: <err>

This command allows control of the Unstructured Supplementary Service Data (USSD) according to GSM 02.90. Both network and mobile initiated op- erations are supported. Parameter <n> is used to disable/enable the presen- tation of an unsolicited result code (USSD response from the network, or net- work initiated operation) +CUSD:<m>[,<str>,<dcs>] to the TE.

When <str> is given, a mobile initiated USSD string or a response USSD string to a network initiated operation is sent to the network. The response USSD string from the network is returned in a subsequent unsolicited +CUSD result code.

The interaction of this command with other commands based on other GSM supplementary services is described in the GSM standard.

Parameter

<n>

0

disable the result code presentation in the TA

 

1

enable the result code presentation in the TA

 

2

cancel session (not applicable to read command re-

 

 

sponse)

<str>

string type USSD-string (when <str> parameter is not given, net-

 

work is not interrogated).

 

If <dcs> indicates that GSM 03.38 default alphabet is used

 

ME/TA converts GSM alphabet into current TE character set ac-

 

cording to rules of GSM 07.05 Annex A.

<dcs>

GSM 03.38 Cell Broadcast Data Coding Scheme in integer for-

 

mat (default 15)

<m>

0

no further user action required (network initiated USSD-

 

 

Notify, or no further information needed after mobile initi-

 

 

ated operation)

 

1

further user action required (network initiated USSD-

 

 

Request, or further information needed after mobile initi-

 

 

ated operation)

 

2

USSD terminated by network

Response

OK

If error is related to ME functionality:

+CME ERROR: <err>

Note

•For the write command <dcs>=15 is supported only.

•On an unsolicited result code with parameter <m>=1 a '> ' is given for fur- ther user action. The user action is finished with a <ctrl-Z> or aborted with <ESC>.

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02.04.2002

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Siemens MC35 manual 48 AT+CUSD Unstructured supplementary service data, At+Cusd=?, At+ Cusd?, +CUSD n OK, Dcs
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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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