Sierra MC7710 RB411u 4G LTE setup

Hello all,

I am facing problem setting up Sierra MC7710 on RB411u. The MC7710 modem is supported by mikrotik and I have tried RouterOS v5.22 and v6.0rc6 but the modem is not responding to any command from routerOS.

The MC7710 is detected by RouterOS as shown in “/system resource usb” and “/port” lists as device usb3.
After it was detected, two interfaces were automatically created, i.e., ppp-client and lte.

The debug log is shown in the picture attached below. From the debug log, it seems that the RouterOS keep sending the modem the follwoing commands:

LTE interface: “lte0: sent AT+CFUN=0”
PPP-cleint interface: “usb 3.0: send ATH & usb 3.0: +++”

Both these commands are shutting down the modem. The command is not set by me and the modem is new. I can’t find anyway to stop these commands. I tried to send AT command to the modem via serial-terminal but the modem is not responding. I am unable to change the data and info channel in the ppp-client interface too.

/system serial-terminal usb3 channel=0 Results:“modem not responding”

Tried to turn on the modem via modem initialization command AT+CFUN=1 in ppp-cleint interface, but nothing changes.

Does any modifications on the MC7710 firmware is required for it to work compatibly with RB411u?

Please advice. Thank you.


Thank you.
Picture1a.png

The Sierra MC7710 configured to start-up in airplane mode (both RX and TX off)?

If so, sending modem initialization command “AT+CFUN=1” from ppp-client interface should activate the modem, but sadly this doesn’t work for me.

Is there anyway to send AT command to MC7710 modem directly from RouterOS?

Any advice? Thank you :slight_smile:

The AT command can be sent by the following command:

/interface lte info 0 user-command=“AT+CFUN=1” user-command-only=yes

or

/interface lte info 0 user-command=“AT+CFUN=1”