AT Command Set

Command

Behaviour on channel 1

Differences on channel 2+3

ATS4 1)

as described

as described

ATS5 1)

as described

not usable

ATS6 1)

as described

not usable

ATS7 1)

as described

not usable

ATS8 1)

as described

not usable

ATS10 1)

as described

not usable

ATS18 1)

as described

not usable

AT\Q

as described

not usable

ATZ

as described

data call parameters not changed

1) Siemens GSM engines support the registers S0 - S29. You can change S0, S3, S4, S5, S6, S7,S8, S10 and S18 using the related ATSn commands (see starting from pg. 26). The other registers are read-only and for internal use only!

2)MC35 allows to use the GPRS commands on all logical channels, but to remain compatible to fu- ture releases it is recommended to use them on channel 1 only. PDP contexts can be defined on any channel, but are visible and usable only on the channel on which they are defined (thus it is not possible to define a context on channel 2 and activate it on channel 3). GPRS data calls can be initiated on any channel but will be always established on channel 1.

Table 7: Summary of AT commands with different behaviour in Multiplex mode

Command

Description

 

Chapter

ATH

Terminates any call in progress, no matter what channel was used to

 

2.12

 

enter ATH

 

 

 

 

 

 

AT&V

Different default configurations on channels 1, 2 and 3

 

2.37

 

 

 

 

AT+IPR

Before you start Multiplex mode, it is recommended to set the ME to

 

2.45

 

57600 bps, especially if you want to use all the three channels. Once

 

 

 

it is activated, the bitrate on channels 2 + 3 should be set to 19200

 

 

 

bps.

 

 

 

 

 

 

AT+IPR=0

Autobauding is not compatible with Multiplex mode. It is neither pos-

 

2.45.1

 

sible to start MUX when autobauding is active, nor to set autobauding

 

 

 

during Multiplex mode.

 

 

 

 

 

 

AT+CALA

Alarm calls can be separately configured on each channel. The read

 

4.2

 

command returns the total number of alarm calls activated on all

 

 

 

channels.

 

 

 

 

 

 

AT+CMEE

Presentation mode can be separately configured for each channel.

 

4.26

 

 

 

 

AT+CNMA

If Multiplex mode is activated the +CNMI parameter will be set to zero

 

5.9

 

on all channels, if one channel fails to acknowledge an incoming

 

 

 

message within the required time.

 

 

 

 

 

 

AT+CNMI

Phase 2+ parameters can only be used on one channel. The pa-

5.10

 

rameter for <mt> and <ds> on the other channels have to be set to

 

 

 

zero.

 

 

If either a SM or a Status Report is not acknowledged, all +CNMI pa- rameter will be set to zero on all channels.

MC35_ATC_01_V04.00

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02.04.2002

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Siemens MC35 manual Command Description Chapter
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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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