Dustproof telephone KNSD-101
We are the manufacturer of waterproof telephone industrial telephone Analogue telephone without keypad for elevator clean room.
Main Product features
1.High waterproof,dustpoof performance,SUS304 full stainless steel body,protection grade reaches to IP55.
2.High durability,oil,acid,alkali resistance,conform to the standards of GJB -773 and UL1332 requirements.
3.Without handset,communication via loudspeaker.
4.Highly integrated mainboard,using the most advanced industry-specific microcontroller made in ATMEL company.
5.The box with earthing device is completely isolated with internal electric circuit,and has certain electromagnetic shielding effect.
6.Conversation with clear loud voice,no feedback sreaming.
7.Support hotline of exchange system.
8.Support the function of exterior line antomatc lift.
9.Support conversation time limited.
10.Strong,thick and beautiful body with embed wall design.
Standard and SMART Analogue and VoIP-SIP options available
DTMF(Dual Tone Multi Frequency)
Matching with most PABX,PBX and PAX systems.
1.Well treated PCB used inside the phone.
2.Robust screw terminals used for the connection of ringer,handset,line in,hookswitch.
3.Selectable 7 minute time out,to release the line if the handset is left off hook.
4.All connectors be greased in production.
VOIP OVER IP-SIP(Version)
Connection type:Rj45 Socket inside sealed enclosure
Power supply:External 5V dc
Call set-up Protocol:Session Initiation Protocol(SIP)
Configuration:DHCP or STATIC IP address provisioning
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1.It is suitable for automatic instrution amplification telephone system when feed voltage reaches to 33-60v.
6.Double audio dialing.
8.Low frequency group:697,770,852,941Hz.
9.High frequency group:1209,1336,1477Hz.
11.The signal level when the lenght of user's line is 3 km.
12.Standard frequency:Low frequency group:-9db.
13.Hight frenquency group:-7db±3db.
14.Level difference frequency high and low frequency of combined signal:2±1db.
15.The total intermodulation distortion caused by harmonic is 20db lower than wave level.
16.Call transmission index:(5KM)SLR≤12,RLR≤-1,and STML≥10,Input impedance:600Ω.
17.Handsfree operation built-in loud speaker 0.5W.