How to cure a Yota modem when used in conjunction with Mikrotik?

Question

Yota

Available:
https://www.yota.ru/store/modem/modem-yota/?backUR... - Modem for the backup channel
mikrotik RB951ui-2hnd (RouteOS 6.40.4) The
modem constantly turns off with a frequency of <1m. Tried to connect directly and via cable. The result is the same. I read on the toaster and in other sources about dancing with shielded wires, power supplies for usb and just usb hubs, but the posts are quite old and I did not find a clear answer. Maybe someone solved such a problem?
lte logs:
18:45:41 lte,debug unknown modem
18:45:41 lte,debug LTE: unknown modem
18:45:41 interface,info LTE link up
18:45:41 system,info item added
18:45: 41 dhcp,info dhcp-client on LTE got IP address 10.0.0.10
18:45:41 interface,info LTE link down
18:45:41 lte,account LTE session: 188933s 684/1377 bytes 2/8 packets
18:45:41 dhcp,info dhcp-client on LTE lost IP address 10.0.0.10 - lease stopped
locally
18:45:41 system,info item removed
18:45:59 lte,debug unknown modem
18:45:59 lte,debug LTE: unknown modem
18:45:59 interface,info LTE link up
18:45 :59 interface,info LTE link down
18:46:00 interface,info LTE link up
18:46:00 system,info item added
18:46:00 dhcp,info dhcp-client on LTE got IP address 10.0.0.10

Answer 1

Follow the steps:
1) Give guaranteed power to the modem at 2 amperes. Need through a good active hub.
2) Make sure that the modem does not overheat. (Just by touch without disassembling the modem)
3) Make sure that the modem is not buggy by itself by loading it with traffic on different PCs / laptops.
Unlikely but possible

18:45:41 lte,debug unknown modem
18:45:41 lte,debug LTE: unknown modem
18:45:41 interface,info LTE link up

The modem or microt tries to give some kind of AT command to which it does not receive a response or does not receive what it expected, i.e. he just does not know about such a modem, what is written in the log. If the situation is exactly this, then only changing the modem model or waiting for the Mikrotik firmware update will save.

Answer 2

What firmware?
Make
Turn on the logs and see what the log outputs

/system logging add topics=async action=memory disabled=no

Answer 3

I also encountered such a problem, I could not start Yota directly from usb, there was not enough voltage, it started through an active hub.

Answer 4

RB951UI-2ND - this model works stably with iota

Answer 5

Just now I have RB951UI-2Hnd and the same glitch, the modem turns off, connects ....