This document introduces the features and characteristics of the Sanhui ATP series SHT-2B/USB and SHT-4B/USB USB recording boxes produced by Hangzhou Sanhui Information Engineering Co., Ltd. The product supports high-impedance recording, various methods of recording start/stop, call/silence detection, etc. It is suitable for analog telephone line recording and direct microphone recording. The product uses a USB 1.1 interface, supports hot plug and play, and is easy to install. It has an analog telephone line interface, eliminating the need for an external junction box, making the connection more convenient and reliable.
The SHT-2B/USB and SHT-4B/USB are USB 1.1 based recording boxes that capture analog telephone line audio and microphone input. They support up to four full‑duplex channels, multiple audio codecs, caller ID, DTMF/FSK detection, and programmable tone analysis, all with hot‑plug capability and no external power required.
The manual includes a functional description, performance features, a block diagram of the recording box, detailed installation instructions with external‑structure diagrams, label explanations, system requirements, and a full list of technical specifications such as dimensions, power consumption, operating temperature, and regulatory compliance. This manual is written in Chinese.
| USB Interface | USB 1.1 |
|---|---|
| Channels | 4 full‑duplex channels |
| Audio Codecs | G711 A‑Law, µ‑Law, Linear PCM, IMA‑ADPCM, MP3, VOX |
| Power Supply | +5 V DC, <400 mA |
| Dimensions | 170 mm × 730 mm × 20 mm |
| Operating Temperature | -20 °C to 85 °C |
| Humidity Range | 0 % to 55 % RH |
| Regulatory Compliance | FCC, CE |
It supports the USB 1.1 standard.
The device can record and playback on four full‑duplex channels at the same time.
Supported codecs include G711 A‑Law, µ‑Law, Linear PCM, IMA‑ADPCM, MP3 and VOX.
It requires a +5 V DC supply with a current draw of less than 400 mA.