Model : Hardware Version : Firmware Version : ISP : Like in this thread-> http://forum.tp-link.com/showthread.php?85040-Archer-C9-keeps-disconnecting I lost the connection ( internet connection icon turn off, then orange and than green) every 5-10 minutes, for 10-30 seconds. i contacted the tp-link service center and said me that i had to replace it. i've done that, and today i configured the second archer c1200. Same problem.. this is the log system of the problem: Hardware Version: Archer C1200 v2.0 Software Version: 2.0.0 Build 20170206 rel.46023 2017-10-27 13:24:11 led-controller[685]: <6> 288051 Start to run WAN1_ON 2017-10-27 13:24:11 led-controller[685]: <7> 288004 WAN1_ON is found 2017-10-27 13:24:11 led-controller[685]: <7> 288003 Led rule name is WAN1_ON 2017-10-27 13:24:11 led-controller[685]: <7> 288001 Receive data length = 132 2017-10-27 13:24:11 led-controller[685]: <6> 288051 Start to run WAN0_OFF 2017-10-27 13:24:11 led-controller[685]: <7> 288004 WAN0_OFF is found 2017-10-27 13:24:11 led-controller[685]: <7> 288003 Led rule name is WAN0_OFF 2017-10-27 13:24:11 led-controller[685]: <7> 288001 Receive data length = 132 2017-10-27 13:24:02 nat[15053]: <7> 211001 Flush conntrack 2017-10-27 13:24:02 nat[15053]: <6> 211021 IPSEC ALG enabled 2017-10-27 13:24:02 nat[15053]: <6> 211021 L2TP ALG enabled 2017-10-27 13:24:02 nat[15053]: <6> 211021 PPTP ALG enabled 2017-10-27 13:24:02 nat[15053]: <6> 211021 RTSP ALG enabled 2017-10-27 13:24:02 nat[15053]: <6> 211021 H323 ALG enabled 2017-10-27 13:24:02 nat[15053]: <6> 211021 TFTP ALG enabled 2017-10-27 13:24:02 nat[15053]: <6> 211021 FTP ALG enabled 2017-10-27 13:23:57 nat[15053]: <6> 211501 Initialization succeeded 2017-10-27 13:23:56 nat[15053]: <6> 211501 Initialization succeeded 2017-10-27 13:23:52 modem[13291]: <7> 292036 backup: switch network to WIRED. 2017-10-27 13:23:47 led-controller[685]: <6> 288051 Start to run WAN1_OFF 2017-10-27 13:23:47 led-controller[685]: <7> 288004 WAN1_OFF is found 2017-10-27 13:23:47 led-controller[685]: <7> 288003 Led rule name is WAN1_OFF 2017-10-27 13:23:47 led-controller[685]: <7> 288001 Receive data length = 132 2017-10-27 13:23:47 led-controller[685]: <6> 288051 Start to run WAN0_ON 2017-10-27 13:23:47 led-controller[685]: <7> 288004 WAN0_ON is found 2017-10-27 13:23:47 led-controller[685]: <7> 288003 Led rule name is WAN0_ON 2017-10-27 13:23:47 led-controller[685]: <7> 288001 Receive data length = 132 2017-10-27 13:23:45 led-controller[685]: <6> 288051 Start to run WAN1_ON 2017-10-27 13:23:45 led-controller[685]: <7> 288004 WAN1_ON is found 2017-10-27 13:23:45 led-controller[685]: <7> 288003 Led rule name is WAN1_ON 2017-10-27 13:23:45 led-controller[685]: <7> 288001 Receive data length = 132 2017-10-27 13:23:45 led-controller[685]: <6> 288051 Start to run WAN0_OFF 2017-10-27 13:23:45 led-controller[685]: <7> 288004 WAN0_OFF is found 2017-10-27 13:23:45 led-controller[685]: <7> 288003 Led rule name is WAN0_OFF 2017-10-27 13:23:45 led-controller[685]: <7> 288001 Receive data length = 132 2017-10-27 13:23:31 nat[13777]: <7> 211001 Flush conntrack 2017-10-27 13:23:28 nat[13777]: <6> 211501 Initialization succeeded 2017-10-27 13:23:27 nat[13777]: <6> 211501 Initialization succeeded 2017-10-27 13:23:23 led-controller[685]: <6> 288051 Start to run WAN1_OFF 2017-10-27 13:23:23 led-controller[685]: <7> 288004 WAN1_OFF is found 2017-10-27 13:23:23 led-controller[685]: <7> 288003 Led rule name is WAN1_OFF 2017-10-27 13:23:23 led-controller[685]: <7> 288001 Receive data length = 132 2017-10-27 13:23:23 led-controller[685]: <6> 288051 Start to run WAN0_OFF 2017-10-27 13:23:23 led-controller[685]: <7> 288004 WAN0_OFF is found 2017-10-27 13:23:23 led-controller[685]: <7> 288003 Led rule name is WAN0_OFF 2017-10-27 13:23:23 led-controller[685]: <7> 288001 Receive data length = 132 please help me :( I contacted the service center I contacted the service center