功能特点：                                                                                       ◆ zui大可提供4路正向视频；                                                                                              ◆ 2路固定Rs485数据;
◆ 可扩展4路/4路双向音频/4路开关量；                                                                         ◆ 语音接口支持来电显示和反极性记费功能 ；                                                                      ◆ 具备*自主知识产权；
◆ 安装简易,无需调节；
◆ 防雷电及浪涌保护；                                                                                                      视频接口:
◆ 信号制式. PAL/NTSO/SECAM                                                                                           ◆ 采洋编财 8bit/10bit                                                                                                        ◆ 采洋频率 ：16.5MHz                                                                                                      ◆ 视频带宽：8MHz                                                                                                             
◆ 信噪比（SNR)>67dB                                                                                                      ◆ 视频输入/输出阻抗 ：75欧非平衡（BNC）                                                                      光纤接口：
◆ 接口类型: 单纤FC/SC                                                                                                      ◆ 波长 :850nm/1310nm/1490nm/1550nm
◆ 发射功率：-5~-8dbm
◆ 接收灵敏度：-23~-26d

音频接口：
◆ 方向：单向/双向
◆ 采样编码：18bit
◆ 采样频率：32KH z
◆ zui大输入输出电压：3.5Vp-p
◆ 信噪比(SNR)≥85 dB
◆ 接口类型：RJ45                                                                                                           数据接口：
◆ 方向：反向/双向
◆ 波特率：0~115.2Kbps
◆ 标准：RS-485/RS232/RS422
◆ 接口类型：RJ45/接线端子
开关量接口：
◆ 方向：单向/双向
◆ 物理接口 ：RJ45
◆ 输入信号： 任意有源或无源报警、开关量输入，支持TTL 或无源开关、按钮
◆ 输出信号：任意有源或无源报警、开关量输入，支持TTL 或继电器触点输出，继电器触点承受zui大 电压电流为DC30V/1A                                                                                                  电话接口:（FXO）                                                                                                          ◆ 标铃检测电压：35V
◆ 振铃检测频率：17Hz-60Hz
◆ 二线输人阻抗：600欧 (摘机)
◆ 回损.40db
接口：(FXS)
◆ 振铃电压：75V                                                                                                              ◆ 振铃频率：25Hz
◆ 二线输入阻杭：600欧 (摘机)
◆ 回损 ：40db                                                                                                                 环境:
◆ 工作温度：-40度~+70度
◆ 存储温度：-40度~+85度
◆ 工作湿度：0~95%  无冷凝