详情描述

HCD28 (8)/TSD Low Radiation Phone is a government exclusive telephone designed for simplicity and practicality, commonly used as a wired communication terminal. It is primarily for military and local government party and political networks. Suitable for programmable, automatic, and common battery telephone exchanges, it features excellent voice transmission quality, high reliability, lightning protection, and low electromagnetic leakage.



Features：

Key Features

Compliant with FSK/DTMF dual-mode caller ID standards.

Live call and outgoing call dynamic storage, incoming calls up to 8 digits with a maximum of 80 groups, outgoing calls up to 12 digits with a maximum of 15 groups.

Two sets of 32-bit direct storage memory.
Voice-number announcement
5 original songs performed by real singers, 8 high-fidelity chord ringtones, 3 special sound effect ringtones, and 8 standard ringtones.
5-digit area code, 2-digit exit code
32-bit dialing pre-emption and error correction

Call forwarding and return call;

Automatic Call Forwarding Feature: hands-free volume adjustment;

Ring volume adjustment

Music play function

Date, clock, and call timer functions;

LCD brightness with 5-level adjustment, intelligent backlight;

Redial the last 32-digit number.

Number issuance pause feature

Faster Disconnection Feature

Keyboard backlight.

 

Key Performance Indicators (KPIs)

Terms of Use

Ambient Temperature: -10℃ to 40℃

Relative Humidity: 10% - 95%

Atmospheric Pressure: 86kPa ~ 106kPa

Ambient Noise: ≤60dB(A)

 

Key Technical Parameters

Electroacoustic Parameters (5km): Sound Level Rating (SLR) ≤ 15 dB

Received Loudness Rating (RLR) ≤ 2 dB

Side Tone Masking Rating (STMR) ≥ 12 dB

Stable Balance Return Loss (2km): ≥15 dB

Echo Balance Return Loss (2km): ≥17 dB

Transmission and reception of non-linear distortion: ≤7%

Direct Current Resistance: ≤350Ω

Ringing Level: High Gear ≥ 70dB(A), Low Gear < 67dB(A)

Wiring resistance: ≤350Ω

Dual-Tone Multi-Frequency (DTMF) Signal Level: Low Frequency Component -9dBm ±3dB

High-frequency Power Level -7dBm±3dB

The high-frequency component level is 2dB ± 1dB higher than the low-frequency component level.

Mean Time Between Failures (MTBF): ≥5000h

Power Source: 3 AA batteries

Dimensions: 266mm x 200mm x 82mm