Loud Speaking Telephone(KNSP-08) - Product
Place of Origin : Shenzhen,China
Product Description
Application:
1.metro
2.highway call box
3.power plant, steel plant
4.Refineries
5.mines
6.Dockside
7.other hazardous environment which has the demand of damp proof , fireproof , dustproof, freeze proof and anti jamming, especially for the place with big noise.
Description:
Defend grade: GB 4208 - 93 IP 66 / IP67
Call capability of phone: GB/T 15279 - 94
Application scope: metro, light railroad, speedway, ship, mine, etc.
External configuration specification:
External dim
Physical Specification
Other Specification : Specification:
1. Applicable For Various Types Of SPC Exchange And Dispatching Exchange System With Feeding Voltage Of 48-60V.
2. Ambient Temperature:-30 ~ +60 Degree Relative Humidity:10%~95%
Atmospheric Pressure: 86~106Kpa Circumstance Noise:less Than 60dB(A)
3. Sound Level Of Ringing : Can Be Set According To Customer's Requirement
A.>70Db B. >90Db C. Can Reach 120Db With A Loudspeaker Which Output Power Is From 10w To 25w.
4. Standard Frequency: Low Frequency Group: 697. 770. 852. 941Hz,
High Frequency Group: 1209. 1336. 1477Hz, Frequency Deviation: -1.5% ~ +1.5%
If Service Line Is A 3Km Signal - Level:
Standard Frequency: Low Frequency Group: -12dB ~ -6dB, High Frequency Group: -10dB ~ -4dB, Level Difference Between Low And High Frequency Of Compound Signal: 0dB~3dB, The Total Distortion Caused By Intermodulation Of Harmonic Wave Is Lower Than The Basic Level By At Least 20dB.
5. Call Transmission Index:(5KM)SLR<12,RLR<-1,STMR>10, Output Impedance Is 600 Ohm
