Host-Based Controller Modem

Data Addendum

AT Command Set

June 15, 1998

 

 

AT Voice Commands Reference (continued)

 

AT+VGR=<gain>

Receive Gain Selection

This command will enable the receive microphone gain control.

<gain> is 0¾255: the only useful range is 121—134

<gain>=128: nominal level for receive gain from microphone

<gain>=<value greater than 128>: increase gain above nominal level

<gain>=<value less than 128>: decrease gain below nominal level

TAD mode—This command may be used in TAD local recording to control the recording level from the microphone.

Speakerphone mode—This command may be used to control the gain to the remote caller.

AT+VGR?

Returns current value of receive gain

AT+VGR=?

Returns range of supported gain values

AT+VEM=<mask>

Event Reporting and Masking

The DTE can use this command to disable an event report regardless of the DCE state, or of the analog signal source or destination configuration. Mask is Bits 0—33 (i.e., FFFFFFFFC). See the IS-101 specification for defined bit values.

AT+VEM?

Returns the current values of the mask

AT+VEM=?

Queries the DCE for the range of supported service level events

AT+VIT = <Timer>

DTE/DCE Inactivity Timer

This command sets the DCE’s value for the DTE/DCE inactivity timer. The units are in one seconds.

AT+VIT?

Returns the current value of the timer

AT+VIT=?

Queries the DCE for the range of supported values

AT+VNH = <Hook>

Automatic Hang-up Control

This command causes the DCE to enable or disable automatic hangups in the data and facsimile modes. See the IS-101 specification for the detailed description of this command and its interaction with the +FCLASS and ATH commands.

<hook> = 0 The DCE retains automatic hangups (which is the way in the other non-voice modes).

<hook> = 2 The DCE disables automatic hangups in the other non-voice modes. The DTE only performs a logical hangup (returns the “OK” result code).

AT+VNH?

Returns the current value

AT+VNH=?

Returns the supported values

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Lucent Technologies Inc.

Version 1.0

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Lucent Technologies Host-Based Controller Modem AT specifications AT+VGR=gain, AT+VEM=mask Event Reporting and Masking

Host-Based Controller Modem AT specifications

Lucent Technologies Host-Based Controller Modem AT represents a significant advancement in modem technology, particularly in the realm of telecommunications and data transmission. This modem, renowned for its efficiency and versatility, is characterized by a host-based architecture, which differentiates it from traditional modems that rely heavily on dedicated hardware.

One of the main features of the Lucent Technologies Host-Based Controller Modem AT is its ability to leverage the processing power of the host computer. By utilizing the host's CPU for data encoding and decoding tasks, the modem can reduce the need for specialized hardware components, allowing for a more cost-effective solution. This design not only facilitates lower manufacturing costs but also enhances the overall performance due to the utilization of the host's computational capabilities.

Another notable characteristic is its compliance with the AT command set, which standardizes communications between the modem and the host system. This ensures compatibility with a wide range of software applications and operating systems. The AT command set allows users to control modem functions easily, making it simpler to configure settings, initiate connections, and manage data transfer processes.

The modem also supports various communication protocols, such as V.90 and V.92, enabling high-speed data transmission over traditional telephone lines. With download speeds of up to 56 Kbps and upload speeds of up to 48 Kbps, the Lucent Technologies Host-Based Controller Modem AT is particularly suitable for Internet browsing, email, and other online activities demanding robust data throughput.

Additionally, the modem features built-in error correction and data compression protocols, such as V.42 and V.44, further enhancing the quality and speed of data transmission. These protocols help minimize the impact of line noise and ensure efficient use of bandwidth, leading to improved connection stability and data integrity.

In terms of connectivity, the Lucent Technologies Host-Based Controller Modem AT typically interfaces via a standard serial or USB port, making it compatible with most modern computers. Its compact design and ease of installation make it an appealing choice for both personal and professional use.

Overall, the Lucent Technologies Host-Based Controller Modem AT showcases significant innovation in modem technology, offering users a reliable and efficient solution for high-speed data communications. Its host-based architecture, adherence to the AT command set, and support for advanced communication protocols position it as a vital tool in the ever-evolving landscape of digital connectivity.