AT Command Set

4.9 AT+CCWA Call waiting

Test command

AT+CCWA=?

Read command

AT+CCWA?

Write command

AT+CCWA=

[<n>,

[<mode>

[,<class>]]]

Reference

GSM 07.07

Response

+CCWA: (list of supported <n>s)

OK/ERROR/+CME ERROR

Parameter

See write command

Response

+CCWA: <n>

OK/ERROR/+CME ERROR

Parameter

See write command

This command controls the Call Waiting supplementary service according to GSM 02.83. Activation, deactivation and status query are supported.

Response

+CCWA: <n>, <mode>,<class>,,<CLI validity>

OK/ERROR/+CME ERROR

Response

If <mode>=2 and command is successful

+CCWA: <status>, <class1><CR><LF>

+CCWA: <status>, <class2><CR><LF>...

OK/ERROR/+CME ERROR

Parameter

 

 

<n>

sets/shows the result code presentation status in the TA

 

0

disable

 

1

enable

<mode>

(when <mode> is not given, network is not interrogated)

 

0

disable

 

1

enable

 

2

query status

<class>

sum of integers each representing a class of information (default 7)

 

1

voice

 

2

data

 

4

fax

 

7

voice, data and fax (1+2+4)

 

8

SMS

 

16

data circuit sync

 

32

data circuit async

 

64

dedicated packet access

 

128

dedicated PAD access

<number>

string type phone number of calling address in format specified by

 

<type>

<type>

type of address octet in integer format (refer to GSM 04.08 sub-

 

clause 10.5.4.7)

<CLI validity>

0

CLI valid

 

1

CLI has been withheld

 

2

CLI is not available

<status>

0

not active

 

1

active

Parameter <n> is used to disable/enable the presentation of the URC

+CCWA: <number>,<type>,<class>,,<CLI validity>

to the TE when call waiting service is enabled.

MC35_ATC_01_V04.00

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02.04.2002

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Siemens MC35 manual AT+CCWA Call waiting
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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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