壁挂式电话voip与模拟壁挂式对讲机是基于voip电话技术,专门针对工业用户需求开发的SIP语音对讲机产品。语音传输采用标准的IP/RTP协议,继承了良好的voip电话兼容性的优点。,完全兼容目前所有基于sip协议的主流IP PBX/软交换/IMS平台,如3CX、Elastix等,为用户快速部署设备提供方便。壁挂式电话特点不锈钢304机身,安装方便。防水等级IP55防尘。3.免提,内置扬声器。4.耐候性符合IP55标准,使用温度范围为-30度至+75度。 5. Lightening protection to ITU-T recommendation K.21. 6. Metal keypad keep waterproof and dusty proof. 7. Wall mounted type installation 8. Auto release the line if the other side not end the call. This function upon buyer’s requirement). 9. Body in electrophoresis process finish no fingerprint. Resistant to corrosion 10.Telephone line powered, RJ11 twisted pair cable connection. 11. Application: Clean room, pharmaceutical factory, hospital, chemical plant, metro etc.