Port forwarding the telnet port (23) makes the router's telnet server accessible. You should be able to telnet into the router then.
Port forwarding makes the my computer's telnet port accessible from Internet.
Your levels of ES are quite unremarkable. By comparison, I currently average about 11 ES per hour down and 4 ES per hour up. Occasional short bursts of HECs are also not unusual.
What is ideal level of ES on snr margin 6 dB? What is ideal level of ES on snr margin 4 dB?
If you can get a monitoring program working to plot the SNR margin it will enable us to see if there's anything which needs attention on your connection. If you can't enable telnet, I understand that Routerstats-Lite works with your router.
Routerstats-lite works but I use mainly Linux.
I've haven synchronization's break during synchronization. What was it? The problem have disappeared when I have disconnected phone cable connecting master phone socket with second phone socket.
Jul 11 10:40:36 user crit kernel: ADSL G.994 training
Jul 11 10:40:44 user crit kernel: ADSL G.992 started
Jul 11 10:40:48 user crit kernel: ADSL G.992 channel analysis
Jul 11 10:40:54 user crit kernel: ADSL G.992 message exchange
Jul 11 10:40:55 user crit kernel: ADSL link down
Jul 11 10:40:56 user crit kernel: ADSL G.994 training
Jul 11 10:41:04 user crit kernel: ADSL G.992 started
Jul 11 10:41:08 user crit kernel: ADSL G.992 channel analysis
Jul 11 10:41:14 user crit kernel: ADSL G.992 message exchange
Jul 11 10:41:14 user crit kernel: ADSL link up, interleaved, us=1237, ds=17844