Chapter 9: Setup Mode: Channel Configuration

Normally, there is a modem connected to a local PC and a modem connected to a remote machine. A user must dial from the local PC to the remote machine, accumulating phone charges for each connection. Modem Mode allows you to replace modems with XPress DR+ units, and to use an Ethernet connection instead of a phone call. By not having to change communications applications, you avoid potentially expensive phone calls.

To select Modem Mode, set the Connect Mode to C6 (no echo), D6 (echo with full verbose), D7 (echo with numeric response), CF (modem responses only, numeric response), or CE (modem responses only, full verbose).

Note: If the unit is in Modem Mode, and the serial port is idle, the unit can still accept network TCP connections to the serial port if Connect Mode is set to C6 (no echo), D6 (echo with full verbose), D7 (echo with numeric response, CF (modem responses only, numeric response), or CE (modem responses only, full verbose).

Without Echo

 

 

In Modem Mode, echo refers to the echo of all of the characters

 

 

 

 

entered in command mode; it does not mean to echo data that is

 

 

 

transferred. Quiet Mode (without echo) refers to the modem not

 

 

 

sending an answer to the commands received (or displaying what

 

 

 

was typed).

 

 

 

 

 

Data Echo & Modem

 

 

Full Verbose: The unit echoes modem commands and responds to

Response

 

 

a command with a message string shown in the table below.

 

 

 

Numeric Response: The unit echoes modem commands and

 

 

 

responds to a command with a numeric response.

 

Modem Responses

 

 

Full Verbose: The unit does not echo modem commands and

Only

 

 

responds to a command with a message string shown in the table

 

 

 

below.

 

 

 

Numeric Response: The unit does not echo modem commands

 

 

 

and responds to a command with a numeric response.

 

 

 

 

 

 

Table 9-6. Modem Mode Messages

 

 

 

 

Message

 

 

Meaning

 

 

 

 

 

Full Verbose

 

 

 

 

 

 

 

 

OK

 

 

Command was executed without error.

 

 

 

 

CONNECT

 

 

A network connection has been established.

 

 

 

 

NO CARRIER

 

 

A network connection has been closed.

 

 

 

 

RING n.n.n.n.

 

 

A remote device, having IP address n.n.n.n, is connecting to this device.

 

 

 

 

 

Numeric Response

 

 

 

 

 

 

 

 

0

 

 

OK

 

 

 

 

1

 

 

Connected

 

 

 

 

2

 

 

Ring

 

 

 

 

3

 

 

No Carrier

 

 

 

 

4

 

 

Error

 

 

 

 

 

Received commands must begin with the two-character sequence AT and be terminated with a carriage return character.

XPress DR+ User Guide

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Lantronix 900-422 manual Message Meaning
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900-422 specifications

The Lantronix 900-422 is a robust industrial device used primarily for remote access and management applications. Known for its reliability and versatility, this product caters to a variety of sectors, including telecommunications, manufacturing, and energy management.

One of the standout features of the Lantronix 900-422 is its ability to provide secure remote management capabilities. With built-in support for secure protocols like SSH and SSL, users can confidently access and control devices over the internet while ensuring data integrity and confidentiality. This security is crucial for applications where sensitive information is transmitted.

The device is equipped with a versatile multi-port serial connectivity option. With support for multiple serial communication protocols, including RS-232 and RS-485, the 900-422 can seamlessly interface with various types of industrial equipment and sensors. This adaptability enhances its usability in diverse environments and tasks, from monitoring weather stations to managing industrial machines.

Another significant characteristic of the Lantronix 900-422 is its compact and rugged design, making it suitable for installation in harsh industrial settings. Its durable exterior is resistant to dust and moisture, ensuring that it maintains performance even in challenging conditions.

The device also features an intuitive web-based interface, simplifying configuration and management. With this graphical user interface, users can quickly set up the device, manage settings, and monitor connected devices, all from a centralized location. This ease of use significantly reduces the time and effort needed for system administrators to maintain their networks.

Additionally, the Lantronix 900-422 is equipped with advanced monitoring and diagnostic tools. Users can track performance metrics and receive alerts for potential issues, enabling proactive maintenance and reducing downtime. The combination of real-time monitoring and remote access capabilities allows organizations to streamline their operations and respond swiftly to any anomalies.

Overall, the Lantronix 900-422 stands out as a reliable solution for remote device access and management. Its blend of security, versatility, and user-friendly features ensures that it meets the diverse needs of modern industrial applications, making it an essential tool for any organization looking to enhance operational efficiency and reliability.
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