Недавно купил это устройство, установил новую прошивку V1.00B02T02.RU.20041014
Модем работает в режиме роутера, через несколько часов работы он отваливается от МТУ,в логах следующие записи:

Nov 10 21:38:46> Doing disconnect
Nov 10 21:38:46> pppd 2.4.1 started by root, uid 0
Nov 10 21:40:26> System Call Error
Nov 10 21:40:26> Connecting PPPoE socket: 00:00:00:00:00:00 0000 0x1000d3b8
Nov 10 21:40:26> Couldn't get channel number: Transport endpoint is not connected
Nov 10 21:40:26> Doing disconnect
Nov 10 21:40:26> pppd 2.4.1 started by root, uid 0
Nov 10 21:42:06> Connecting PPPoE socket: 00:00:00:00:00:00 0000 0x1000d3b8
Nov 10 21:42:06> Couldn't get channel number: Transport endpoint is not connected
Nov 10 21:42:06> Doing disconnect
Nov 10 21:42:07> System Call Error
Nov 10 21:42:07> pppd 2.4.1 started by root, uid 0
Nov 10 21:43:47> System Call Error
Nov 10 21:43:47> Connecting PPPoE socket: 00:00:00:00:00:00 0000 0x1000d3b8
Nov 10 21:43:47> Couldn't get channel number: Transport endpoint is not connected
Nov 10 21:43:47> Doing disconnect
Nov 10 21:43:47> pppd 2.4.1 started by root, uid 0

Лечится только перезагрузкой по питанию.

КАк это можно вылечить?

Аналогичный случай. Сейчас устройство работает в режиме бриджа. При переключении на PPPOE выдает такие же логи.
Прошивка V1.00B02T02.RU.20041014
Либо у меня руки кривые, либо проблема на лицо.

Вставьте сюда лог полностью

Sep 8 12:00:25> DSL Carrier is training
Sep 8 12:00:34> Connecting PPPoE socket: 00:30:88:01:15:6e 2703 nas0 0x1000d3b8
Sep 8 12:00:34> Connect: ppp0 {--} nas0
Sep 8 12:00:34> WAN IP address 83.237.211.141
Sep 8 12:00:34> WAN gateway 83.237.211.1
Sep 8 12:00:34> PPPoE Connect with IP Address 83.237.211.141
Sep 8 12:00:34> PPPoE Connection Successfully Established
Sep 8 12:00:34> PPPoE Connect with Gateway IP Address: 83.237.211.1
Sep 8 12:00:35> DSL Carrier is up
Jan 1 04:09:41> DSL Carrier is training
Jan 1 04:09:51> DSL Carrier is training
Jan 1 04:10:01> DSL Carrier is up
Jan 1 04:10:07> Connection terminated.
Jan 1 04:10:07> Doing disconnect
Jan 1 04:10:07> pppd 2.4.1 started by root, uid 0
Jan 1 04:10:17> Connecting PPPoE socket: 00:30:88:01:15:6e b406 nas0 0x1000d3b8
Jan 1 04:10:17> Connect: ppp0 {--} nas0
Jan 1 04:10:18> WAN IP address 81.195.3.230
Jan 1 04:10:18> PPPoE Connect with IP Address 81.195.3.230
Jan 1 04:10:18> WAN gateway 81.195.3.1
Jan 1 04:10:18> PPPoE Connection Successfully Established
Jan 1 04:10:18> PPPoE Connect with Gateway IP Address: 81.195.3.1
Jan 1 04:24:18> Serial link appears to be disconnected.
Jan 1 04:24:24> Connection terminated.
Jan 1 04:24:24> Doing disconnect
Jan 1 04:24:24> Terminated: Peer Not Responding to Echo Requests
Jan 1 04:24:29> pppd 2.4.1 started by root, uid 0
Jan 1 04:26:09> Connecting PPPoE socket: 00:00:00:00:00:00 0000 0x1000d3b8
Jan 1 04:26:09> Couldn't get channel number: Transport endpoint is not connected
Jan 1 04:26:09> Doing disconnect
Jan 1 04:26:09> System Call Error
Jan 1 04:26:14> pppd 2.4.1 started by root, uid 0
Jan 1 04:27:54> Connecting PPPoE socket: 00:00:00:00:00:00 0000 0x1000d3b8
Jan 1 04:27:54> Couldn't get channel number: Transport endpoint is not connected
Jan 1 04:27:54> Doing disconnect
Jan 1 04:27:54> System Call Error
Jan 1 04:27:59> pppd 2.4.1 started by root, uid 0

Что никто не может сказать, что делать в моей ситуации?

>V1.00B02T02.RU.20041014
Попробуйте откатится на предыдущую прошивку, должно помочь...
Можно попробовать
V1.00B02T02.RU.20040830
или
V1.00B02T02.RU.20041006
Если это не поможет, тогда разбирайтесь с линией...