Chapter 3 – Using Your Wireless Modem

Establishing a Voice Call

•Enter PIN Code (if required by your wireless provider)

Type AT+CPIN=1234

Responses: OK (PIN Code accepted)

+CME ERROR : 16 (Incorrect PIN Code)

+CME ERROR : 3 (PIN already entered [with +CMEE : 1 mode])

•Initiate a voice call

Type ATD1234; (Note: Don’t forget the semicolon “;” at the end. This stands for voice calls)

Responses: OK (Communication established)

CME ERROR : 11 (PIN Code not entered [with +CMEE : 1 mode])

CME ERROR : 3 (Operation not allowed)

•Initiate an emergency call

Type ATD112; (Note: Don’t forget the semicolon “;” at the end. This stands for voice calls)

Responses: OK

•Hang up Type ATH

Responses: OK

Establishing a Circuit-Switched Data Call for a Point-to- Point Connection

A Circuit-Switched Data Connection (CDC) makes the wireless modem work similar to a regular analog modem. You must have CSD service in order to make a CSD call. Note that your wireless provider charges airtime usage for these connections.

Note: Your cellular provider charges airtime usage for these connections.

1.Using HyperTerminal, you can establish a CSD connection by entering the following command:

ATD<phone number>

Notes:

•The phone number you are calling is entered between the brackets. For example, <8585551212>

•This command tells the modem to dial the desired phone number. If you are dialing to another modem, the modem should answer and a connection between the two modems will be established.

2.To disconnect, use the following commands:

+++ Wait about two seconds to see an OK response. Then type:

ATH

Note: +++ is the escape sequence and ATH is the Hang-up command.

Answering a Circuit-Switched Data (CSD) Connection

A Circuit-Switched Data Connection makes the wireless modem work similar to a regular analog modem. You must have CSD service in order to answer a CSD call.

There are three phone numbers for GSM: the voice number, the data number, and the fax number. All are provided by the carrier. To answer a call:

Establish A Connection:

Call into the modem by dialing the data number provided by your carrier.

Answer a Call:

When you see the RING responses on the terminal screen, enter ATA <cr> to

 

answer the call.

Set Auto-Answer:

Enter ATS0=x

 

This sets the modem to auto-answer. The call will be answered after the number

 

of rings entered. x stand for the number rings.

 

Then call into the number provided to you by the carrier.

Disconnect:

Type: +++

 

Wait about one second to see an OK response.

 

Then type: ATH

Multi-Tech Systems, Inc. MultiModem EDGE USB Wireless Modem User Guide

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Multi-Tech Systems MTCBA-E-U manual Establishing a Voice Call, Answering a Circuit-Switched Data CSD Connection
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MTCBA-E-U specifications

Multi-Tech Systems, a pioneering leader in IoT devices, offers the MTCBA-E-U, a compact and powerful cellular modem designed for a variety of applications. Known for its flexibility and robust connectivity, the MTCBA-E-U is tailored for developers and businesses looking to integrate cellular connectivity into their projects. This versatile device supports multiple cellular standards, including LTE, making it suitable for a wide range of IoT solutions.

One of the standout features of the MTCBA-E-U is its ability to provide reliable data transmission over cellular networks. It supports global LTE bands, ensuring that the device can operate seamlessly across various regions. This makes it an ideal choice for organizations that require a consistent connection for remote monitoring, asset tracking, or machine-to-machine communication.

The MTCBA-E-U boasts a compact form factor, allowing for easy integration into existing systems without occupying excess space. This feature is particularly beneficial for applications where space is at a premium. Additionally, the device is equipped with multiple interfaces, including USB, UART, and GPIO, offering flexibility for different connection and communication needs.

Powered by an efficient processor, the MTCBA-E-U delivers fast data rates, ensuring that users receive timely information. Its low power consumption is another notable characteristic, allowing for longer operational times, which is crucial in battery-powered applications. This efficiency contributes to the overall sustainability of solution deployments, particularly in remote or hard-to-reach locations.

Security is a top priority for IoT devices, and the MTCBA-E-U does not disappoint. It incorporates advanced security protocols to protect data transmission. This includes features like secure boot and encryption, helping to safeguard sensitive information against potential cyber threats.

Multi-Tech Systems provides comprehensive support and resources for developers using the MTCBA-E-U. This includes a rich set of development tools and APIs, enabling users to rapidly prototype and deploy their applications. The company's commitment to customer support ensures that businesses can overcome challenges quickly and effectively.

In conclusion, the Multi-Tech Systems MTCBA-E-U is a versatile and reliable cellular modem that stands out in the IoT landscape. With its global LTE support, compact design, multiple interfaces, low power consumption, and robust security features, it is an excellent choice for any organization looking to leverage cellular connectivity in their IoT solutions.
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