◆挂断功能、重拨功能 (无来电显示)                                
◆闭音功能                                                    
◆预留录音输出端口     
◆输入音量调节                                                      
◆闪断时间选择100mm/600mm                      
◆预留RJ09和2.5MM两个耳机插座可以实现三方通话                                                                       ◆来电时可选择响铃大小和自动接听功能