Inmate Phone Calls
The inmate phone call using a metal casing, has a destructive character. Prison call, with high-definition LCD display, 16 external metal buttons, use magnetic hook, the phone hangs up automatically when the phone is hung up, use metal phone line, prevent tearing.
How to clear out number:
Main Product features
1.Robust aluminium alloy die-cast body.
2.Full keypad with memory,10 button or 4 button programmable speed-dial telephone,Iiluminated button optional.
3.Weatherproof standard, service temperature range from:0°C to +75°C.
4.Magnetic reed hook-switch.
5.Telephone Line powered.No external power or battery back up required.
6.Lightening protection to ITU-T recommendation K.21.
7.Handset:made of special engineering plastic, high anti-knock resistance,Weatherproof,armoured cable optional.
8.Hearing Aid compatible receiver,Noise canceling microphone.
9.Handset integrity wiring to enable the telephone system to check if the telephone unit is still operational.
10.Selectable 7 minute time out,to release the line if the handset is left off hook.
11.Vandal resistant and tamper-resistant hardware.
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.
1.Kirk electro dynamic transducer for both handset transmitter and receiver.
2.Spring cable or armoured cable to attach the handset to the telephone main unit.
3.Stainless steel cable to connect exchange.
4.Inductive coupler fitted for hearing aid compatibility.
5.Handset integrity wiring to enable exchange to check if the phone is still operational.
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
1.Applicatble for various types of SPC exchange and dispatching exchange system with feeding voltage of 33v-60v.
2.Ambient temperature:-30°C-70°C Relative
3.Sound level of ringing:>=70dB(A).
4.Standard frequency:low frequency group:697,770,852,941Hz,high frequency group:1209,1336,1477Hz,frequency deviation : <=+-1.5%,if service line is a 3km
signal-level: Standard frequency:low frequency group:-9dB+-3dB,high frequency group: -7dB+-3dB,level difference between low and high frequency of conpound signal:2+-1dB,
the total distortion caused by intermoudulation 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 600Ω.
6.Super strong function is avaiable for dialing 12 groups of numbers stored in the memory.(maximum length of each store number is 16 digits)
Inmate phone calls, different general public telephones, prisoner calls need to have certain confidentiality and monitoring. The prisoner's telephone dispatching system uses centralized management of sip server and regionalized management to achieve partition and monitoring integration.
This product model:KNZD-05 LCD