The HCD68TSD Low Radiation Telephone is a government-exclusive model focusing on simplicity and practicality, commonly used as a wired communication terminal. It is primarily used for equipping military and local party and government special networks. Suitable for programmed, automatic, and common battery telephone exchanges, it features excellent voice transmission quality, high reliability, lightning protection, and low electromagnetic leakage.
Features：
Primary Functions
Compatible with FSK/DTMF incoming call display standards.
3 ringtone tones to choose from, with options for loud, soft, or off.
Call: Up to 62 groups of 8 digits
Phone Calls: Up to 16 groups of 8 digits, dynamic storage available, up to 32 digits in total.
10 sets of 16-bit single key memory, non-volatile upon power loss.
5-digit area code, caller ID blocking, 2-digit outgoing code
Hands-free volume adjustable
Flash function. FLASH time options: 1000ms/600ms/300ms/110ms
A set of alarm clock features
Call back for incoming and outgoing calls
Keep Function, Mute Function
New power-on indicator
Date, clock, and call timer functions;
Key Performance Indicators (KPIs)
Terms of Use
Ambient Temperature: -10℃ to 40℃
Relative Humidity: 10% ~ 95%
Atmospheric Pressure: 86kPa ~ 106kPa
Environmental Noise: ≤60 dB(A)
Key Technical Parameters
Electro-acoustic Parameters (5km): Sound Level Rating (SLR) ≤ 15 dB
Receive Loudness Rating (RLR) ≤ 2 dB
Side Tone Masking Rating (STMR) ≥ 12 dB
Stable Balance Return Loss (2km): ≥15dB
Echo Balance Return Loss (2km): ≥17dB
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 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.
Receive caller ID FSK signal:
-37dBm to -6dBm
Average Mean Time Between Failures (MTBF): ≥5000h
Power Source: 3 AA Batteries
Dimensions: 228mm x 180mm x 102mm
