AT Command Set and 13 S-Registers

Overview	13-1
Operating Modes	13-1
Switching Between Data Mode and Online Command Mode	13-1
Command Guidelines	13-2
AT Command List	13-2
AT Command Format	13-5
S-Register List	13-14
S-Register Format	13-14

Overview

The AT command set provides an alternative method to the front panel for entering commands that control the operation and configuration of the 3800Plus modems.

AT commands are issued from an asynchronous DTE (such as a personal computer). This chapter explains how to use AT commands and lists the modifiers for all

AT commands supported by the 3800Plus modems.

Switching Between Data Mode and Online Command Mode

Sometimes it is necessary to change operating parameters while the modems are online. The escape sequence allows you to toggle the modem between Data mode and online Command mode while maintaining a connection with the remote modem. This is accomplished using the escape sequence (+++) to exit Data mode and the O command to return to Data mode.

Operating Modes

The 3800Plus modem has two operating modes: Command mode and Data mode. Before a modem goes online (establishes a successful connection with a remote modem), it is considered to be in Command mode, an idle state where you can modify its operating parameters or issue modem commands.

In Command mode, any command issued is acknowledged with a response in either words or digits known as a result code. Refer to Appendix B for a list of result codes.

Once the modems go online, either by answering or originating a call, they automatically switch to Data mode. Data mode is a state where any entries made from the DTE are considered data and are transmitted and received between modems. The modems remain in Data mode until the connection is broken or until they are forced into online Command mode using the escape sequence.

Escape Sequence and Escape Guard Time

The escape sequence is only issued when the modem is online and in Data mode. The 3800Plus modem uses three consecutive plus (+) characters as the escape sequence.

(To change this value, refer to S-register S2 discussed later in Table 13-2 in the S-Register Format section.)

To prevent the modem from interpreting an embedded

+++in data as an escape sequence, the Escape Guard Time value determines the length of the pause before and after the escape sequence is issued. The 3800Plus modem uses a one second pause as the Escape Guard Time. (To change this value, refer to S-Register S12 discussed later in Table 13-2 in the S-Register Format section.)

To enter online Command mode while in Data mode, enter the following sequence:

TYPE: +++

3980-A2-GB30-20

November 1996

13-1

3800PLUS specifications

The Paradyne 3800PLUS is a sophisticated networking device designed for various applications in high-demand environments, such as telecommunications and enterprise networks. This versatile solution is well-regarded for its robust performance, providing reliable and efficient connectivity for businesses and service providers.

One of the standout features of the Paradyne 3800PLUS is its ability to deliver high-speed data transmission. Supporting multiple protocols, it ensures seamless connectivity for data, voice, and video over the same infrastructure, reducing the need for multiple devices and simplifying network management. The device is capable of supporting both synchronous and asynchronous data formats, making it suitable for diverse networking needs.

With its advanced multiple service options, the Paradyne 3800PLUS supports various connection types, including T1, E1, and DSL, allowing it to adapt to different local area network (LAN) settings. This flexibility makes it a preferred choice for organizations that require support for both legacy systems and modern technologies. Furthermore, the device offers built-in support for various network management protocols, such as SNMP, simplifying monitoring and configuration.

Security is a significant concern in today's networking landscape, and the Paradyne 3800PLUS addresses this with integrated security features that help ensure data integrity and privacy. The device supports encryption and authentication techniques, which protect against unauthorized access and safeguard sensitive information transmitted over the network.

The Paradyne 3800PLUS is also designed with ease of use in mind. Its web-based interface simplifies configuration and management, making it accessible for network administrators regardless of their technical expertise. Additionally, the device is equipped with diagnostic tools and indicators that facilitate troubleshooting, enabling quicker resolution of connectivity issues.

In terms of scalability, the Paradyne 3800PLUS can accommodate the growing needs of businesses and service providers. Its modular design allows for easy upgrades and the addition of new features, ensuring that the network infrastructure can evolve with changing demands.

In summary, the Paradyne 3800PLUS stands out as an advanced networking solution known for its high-speed capabilities, support for various protocols, integrated security measures, user-friendly management interface, and scalability. These characteristics make it an ideal choice for organizations seeking a reliable and efficient networking solution to enhance their operations and support future growth.

Paradyne 3800PLUS manual AT Command Set and 13 S-Registers, Operating Modes

Models: 3800PLUS