Part 4 – AT Commands for the SocketModem iCell, SocketModem IP, and MultiModem iCell

Chapter 14

#CONNECTIONSTART – Start Communication

Description:

This command directs the TCP/IP stack to originate an outgoing call.

 

Upon receiving this command, the TCP/IP stack attempts to complete a connection session.

 

The TCP/IP stack will dial the number according to the #GPRSMODE value and Dial Option

 

parameter (DIALN1 or DIALN2 depending on DIALSELECT). If an error occurs, the TCP/IP stack

 

automatically re-attempts the call origination attempt, according to the REDIALCOUNT

 

parameter. Once the physical layer is up, the TCP/IP stack runs.

Values:

Read Parameters:

 

 

DIALN1

 

 

DIALN2

 

 

DIALSELECT

 

 

ISPPW

 

 

ISPUN

 

 

REDIALCOUNT

 

 

REDIALDELAY

 

Syntax:

AT#CONNECTIONSTART

 

 

Command

Possible Responses

 

AT#CONNECTIONSTART

DIALING

 

 

Note: Phone line is available

 

Notes:

2124560123

 

Note: Dial DIALN1 or DIALN2 number depending on

 

Request connection to network.

 

DIALSELECT

 

This is for GPRSMODE=0.

 

CONNECT 9600

 

 

 

 

Note: Modem speed negotiated between both sides. If the

 

 

TCP/IP stack is configured for modem only operation

 

 

(PPPMODE parameter), there are no more return codes

 

 

213.192.200.4

 

 

Note: IP address attributed to the TCP/IP stack

 

 

Ok_Info_PPP

 

 

Note: As soon as the TCP/IP stack software displays this

 

 

message, it is ready to receive commands

 

AT#CONNECTIONSTART

Ok_Info_GprsActivation

 

Notes:

Note: As soon as the TCP/IP stack software displays this

 

Request connection to network.

message, it is ready to receive commands

 

This is for GPRSMODE=1 or

213.192.200.4

 

GPRSMODE=2

Note: IP address attributed to the TCP/IP stack

 

AT#CONNECTIONSTART

BUSY

 

 

Note: A busy signal is detected on the remote site

 

 

TCP/IP stack will wait REDIALDELAY seconds then dial

 

 

again. The redialing will continue until success or until the

 

 

number of call retries defined in parameter REDIALCOUNT

 

 

has been reached.

 

AT#CONNECTIONSTART

NO CARRIER

 

 

Note: A physical connection could not be completed. The

 

 

TCP/IP stack will wait REDIALDELAY seconds then dial

 

 

again. The redialing will continue until success or until the

 

 

number of call retries defined in parameter

 

 

REDIALCOUNT has been reached.

Universal IP AT Commands Reference Guide (Document S000457K)

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Multi-Tech Systems iCell GPRS (MTSMC-G2-IP manual #CONNECTIONSTART Start Communication, At#Connectionstart
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iCell GPRS (MTSMC-G2-IP specifications

Multi-Tech Systems iCell GPRS (MTSMC-G2-IP) is a versatile and powerful device designed for seamless connectivity in various applications, particularly in industrial and commercial environments. Known for its robust performance, the iCell GPRS module incorporates advanced technologies that enable effective communication over GPRS networks, making it an ideal solution for IoT applications, remote monitoring, and data collection processes.

One of the main features of the iCell GPRS is its dual SIM capability, which enhances network reliability and ensures continuous connectivity even in the event of network outages. By allowing the use of two SIM cards from different carriers, the device can switch between networks automatically, thereby minimizing downtime and maintaining critical communication channels.

The iCell GPRS supports various protocols including TCP/IP, UDP, and MQTT, which facilitates seamless integration with a range of applications. This flexibility in communication protocols allows developers to create customized solutions tailored to their specific needs, ensuring that the device can fit seamlessly into their existing infrastructure.

Another key characteristic of the MTSMC-G2-IP is its compact design and durability, making it suitable for deployment in a variety of environments. It features a wide operating temperature range that allows it to function efficiently in both extreme heat and cold, thereby catering to diverse applications across different industries. Additionally, the device is designed for easy installation and integration, which helps reduce deployment time and costs.

The iCell GPRS also includes built-in security features such as firewalls and secure data transmission protocols, protecting sensitive information from unauthorized access. This is particularly important for applications in sectors such as healthcare, finance, and transportation, where data integrity and security are paramount.

Furthermore, the device is equipped with various I/O ports that facilitate connectivity with external sensors, actuators, and other hardware. This feature makes it highly adaptable for monitoring and control systems, enabling users to gather real-time data and respond promptly to changing conditions.

In sum, the Multi-Tech Systems iCell GPRS (MTSMC-G2-IP) is a reliable and feature-rich solution designed for modern communication needs. Its dual SIM support, protocol versatility, robust design, and integrated security features make it an ideal choice for IoT and remote monitoring applications across numerous industries. Whether used in industrial automation, environmental monitoring, or smart cities, the iCell GPRS stands out as a dependable device that enhances connectivity and operational efficiency.
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