AT Command Set

4.21 AT+CLCK Facility lock

Test command

AT+CLCK=?

Execute command

AT+CLCK=<fac>,

<mode>

[,<passwd>

[,<class>]]

Response

+CLCK: (list of supported <fac>s) OK

Parameter

See execute command

Use this command to lock, unlock or interrogate a ME or a network facility <fac>. The command can be aborted when network facilities are being set or interrogated.

Response

If <mode> 2 and command is successful

OK

If <mode> = 2 and command is successful

+CLCK: <status>[,<class1>[<CR><LF>

+CLCK: <status>, class2....]] OK

If error is related to ME functionality:

+CME ERROR: <err>

Parameter

<fac> Phone security locks set by client or factory:

“SC” SIM (lock SIM cards). SIM requests password upon ME power- up and when this lock command is issued. "SC" lock is protected with SIM PIN1. The number can be modified with AT+CPWD or AT^SPWD. See examples in Chapter 4.21.2 for further explana- tions.

“PS” Phone locked to SIM card. ME requests password when other than current SIM card is inserted.

If set individually by the client, the password for the "PS" lock can be specified with AT+CPWD or AT^SPWD.

If set by factory (e.g. for a prepaid mobile), the password is sup- plied by the provider or operator.

“FD” SIM fixed dialling memory: If the mobile is locked to "FD", only the phone numbers stored to the "FD" memory can be dialled (depending on the SIM card, usually up to 7 numbers). If PIN2 authentication has not been performed during the current ses- sion, PIN2 is requested as <passwd>.

"CS" Keypad lock (not supported since keypad cannot be directly connected to the GSM engine)

Note: Primarily intended for the client to take safety precautions, "SC", "PS" and "FD" can be configured individually. "PS" may also be factory set.

"PS" lock is frequently referred to as "phone lock", or "device lock". Accordingly, the password may be called "phone code" or "device code". The "PS" password is not associated with the PUK of the SIM card. If incorrectly entered three times, the Master Phone Code is required to lift the lock. Once the Master Phone Code has been acctepted, the mobile is operational, and the "PS" lock is no longer active. If needed it must be set once again. See Chapter 4.35.1 and examples below for further de- tails.

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Siemens MC35 manual 21 AT+CLCK Facility lock, At+Clck=?, +CLCK status,class1CRLF +CLCK status, class2.... OK

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.

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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.