industrial use telephone - Product

Other Specification : 1. Applicable For Various Types Of SPC Exchange And Dispatching Exchange System With Feeding Voltage Of 48-60V. 2. Ambient Temperature:-30 ~ +60 DegreeRelative Humidity:10%~95% Atmospheric Pressure: 86~106Kpa Circumstance Noise:less Than 60dB(A) 3. Sound Level Of Ringing:over 70dB(A). 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. 6. Super Strong Function Is Available For Dialing 12 Groups Of Numbers Stored In The Memory (maximum Length Of Each Number Is16 Digits)

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