AT Command Set and S-Registers14

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1

Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1

Switching Between Data Mode and Online Command Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1

Escape Sequence and Escape Guard Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1

Command Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-2

AT Command List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-2

AT Command Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-3

S-Register List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-15

S-Register Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-15

Overview

The AT command set provides an alternative method to the front panel for entering commands that control the operation and configuration of the 3800 Series modems. This chapter discusses guidelines necessary to operate AT commands as well as listing the modifiers for all

AT commands supported by the 3800 Series modems. AT commands are issued from asynchronous DTEs (such as a personal computer).

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 3800 Series 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 Table B-1 for a listing of result codes.

Once the modems are 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 3800 Series modem uses three consecutive plus (+) characters as the escape sequence. (To change this value, refer to S-register S2 discussed later in Table 14-2 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 3800 Series modem uses a one second pause as the Escape Guard Time. (To change this value, refer to S-register S12 discussed later in Table 14-2 in the S-Register Format section.)

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

TYPE: +++

3810-A2-GB30-30

September 1998

14-1

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Paradyne 3800 manual AT Command Set and S-Registers14, Operating Modes, Switching Between Data Mode and Online Command Mode
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3800 specifications

The Paradyne 3800 is a versatile broadband access platform that has gained recognition for its impressive features and robust performance in delivering high-speed data communications. Designed to meet the demands of both residential and commercial environments, the Paradyne 3800 stands out with its innovative technologies and reliable characteristics.

One of the main features of the Paradyne 3800 is its capability to support multiple protocols, including Ethernet, IP, and ATM. This multi-protocol flexibility allows service providers to offer a range of services, from high-speed Internet access to voice over IP (VoIP) and video conferencing. This adaptability makes it an ideal solution for diverse customer requirements, enhancing service delivery and customer satisfaction.

The Paradyne 3800 utilizes advanced DSL technologies, most notably ADSL and ADSL2+, to provide high-speed internet services over existing copper telephone lines. With a maximum downstream rate of up to 24 Mbps, the 3800 ensures fast data transfers, making it suitable for bandwidth-intensive applications such as streaming and online gaming. Additionally, the device supports bonding capabilities, allowing multiple DSL lines to work together, effectively increasing bandwidth and enhancing overall performance.

Built with scalability in mind, the Paradyne 3800 allows for easy upgrades and expansions. Service providers can seamlessly add more capacity or features as demand grows without significant overhauls to the existing infrastructure. This scalability is complemented by an intuitive management interface, which simplifies network configuration, monitoring, and troubleshooting.

Security is another key characteristic of the Paradyne 3800. It employs various encryption methods and security protocols to safeguard user data and ensure secure communications. This focus on security is increasingly important in today’s cyber landscape, where protecting sensitive information is paramount.

In summary, the Paradyne 3800 is a sophisticated broadband access platform that combines cutting-edge technologies, multiple protocol support, and robust security features. Its scalability, high performance, and ease of management make it an attractive option for service providers looking to enhance their offerings and deliver reliable connectivity to their customers. Whether it’s for high-speed internet, voice, or video services, the Paradyne 3800 is positioned as a dependable solution in the evolving telecommunications landscape.
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