Vandal-proof电话KNZD-29

模拟 网络电话 坡

KNZD-29防恶意公务机，可为家庭安全或公共安全提供带有电话线供电的公寓对讲音频系统。ZD0290012 1。采用冷轧钢机身，安装方便。防水等级IP55防尘。3.来电指示灯，支持热线呼叫。4.耐候性符合IP55标准，使用温度范围为-30度至+75度。5.ITU-T建议K.21的雷电保护。6. Heavy Duty handset with hearing Aid compatible receiver, Noise canceling microphone. 7. Handset with industrial strong armored cord . 8. Phone integrity wiring to enable the telephone system to check if the telephone unit is still Operational.(If PABX have this available we can provide this function). 9. Optional 7 minute time out to release the line if the handset is left off hook. This function upon buyer’s requirement). 10. Powder coated in UV stabilized polyester finish. 11. The housing covered with a layer of reflective label for easy identification at night.Optional 12. Application: Tunnel, metro, railway, LRT, speedway, marine, ship,offshore, mine, power plant, bridge etc.