The MDL2-4N-01-500-1024 digital audio recorder is designed for continuous multichannel recording, storage, and analysis of speech information. It is used for monitoring telephone conversations, recording dispatch calls, monitoring acoustic environments, and logging business communications. The recorder supports connection to various audio sources, including telephone lines, microphones, line outputs of equipment, and specialized communication systems.

This model belongs to the professional series of standalone recorders, capable of operating without a constant connection to a computer. A built-in digital signal processor ensures high-quality audio processing and reliable operation, even during long-term continuous recording. Thanks to its compact metal housing and fanless cooling system, the recorder operates virtually silently and is suitable for use in offices, control rooms, and server rooms.

The recorder is equipped with a built-in hard drive and a flash buffering system, which improves data storage reliability. Audio information is first recorded to the internal flash memory and then automatically transferred to the main drive. This approach reduces the load on the hard drive and increases its service life.

Support for network interfaces allows the device to be integrated into a company's local network and access the recording archive via standard network protocols. The recorder is controlled via a web interface or specialized software, simplifying system administration and operator monitoring.

Key Features

• Multi-channel recording of conversations and acoustic signals

• Connection to telephone lines, microphones, and line-level audio sources

• Automatic registration of incoming and outgoing calls

• Logging of DTMF, Caller ID, and other service signals

• Network access to the audio recording archive via Ethernet

• Remote monitoring and control via a web interface

• Continuous 24/7 recording

• Data protection and access control system

Technical Specifications

• Number of recording channels: 4 universal channels

• Connection types: telephone line, microphone, line-level audio signal

• Connector type: RJ-12

• Galvanic isolation of inputs: yes

• Phantom power for microphones: 12 V

• Audio recording formats: WAV (PCM, MP3, M2400), FLAC

• Compression algorithms: MP3, M2400, FLAC

• Audio codec bit depth: 24 bits

• Sampling frequency: 8/ 16 / 32 kHz (channel-independent)

• Communication interfaces: Ethernet 10/100, RS-232, USB

• Built-in storage: 500 GB HDD

• Flash buffer: 1024 MB

• Power supply: 8–18 V or 220 V adapter

• Dimensions: 105 × 130 × 44 mm

• Weight: approx. 500 g

Model advantages

• Standalone operation without a permanent PC connection;

• Reliable data storage system with hybrid drive;

• High-quality recording thanks to a specialized audio codec;

• Remote access and control via the network;

• Compact size and low power consumption;

• Protection of connected lines thanks to galvanic isolation.

Application areas

• Enterprise control rooms;

• Security services and monitoring centers;

• Call centers and customer service;

• Recording conversations in telecommunications systems;

• Monitoring operator and employee conversations;

• Recording meetings and operational negotiations.

The MDL2-4N-01-500-1024 digital audio recorder is an effective solution for building voice recording systems in enterprises that require reliable storage of conversations, monitoring of operator performance, and archiving of audio data. Thanks to network integration and universal inputs, the device easily integrates into existing communications infrastructure and provides high-quality recording in multi-channel mode.