In places where there is no network infrastructure, we may have to have internet from
GSM operators. Or even if there is a network infrastructure, we may sometimes need it in redundancy. Now, let’s get some information about
Mikrotik LTE / 4G Integrated models.
Below is a list of models that support LTE / 4G.
These Mikrotik LTE 4G supported models:
- SXT LTE kit
- LHG LTE kit
- wAP LTE kit
- LtAP mini LTE kit
These products include integrated LTE / 4G Modem cards. The software updates of these cards are carried out differently from the
RouterOS update. I will explain below how this update and configuration are.
LTE Device Configuration (6.41 and above)
APN information is required for LTE devices to work. You can get this information from the GSM operator of your country.
/interface lte apn add profile=internet apn=internet authentication=none
You are defining the newly created apn profile on your LTE modem.
/interface lte set [find] apn-profiles=internet
To monitor the connection status of your LTE modem:
/interface lte print
Flags: X - disabled, R - running
0 R name="lte1" mtu=1500 mac-address=AA:AA:AA:AA:AA:AA
After the RouterOS version 6.41 version, a DHCP Client is automatically created for LTE devices. In addition, if there is no DHCP client for the LTE interface, you can do it with the following command.
add default-route-distance=2 disabled=no interface=lte1
You will need to masquerade to access the Internet from LTE Device.
/ip firewall nat
add action=masquerade chain=srcnat out-interface=lte1
To view information about the connection status of the LTE Device.
It displays the information about the connection status of the LTE Device as seen below.
[admin@MikroTik] > /interface lte info lte1 once
status: call in progress
pin-status: no password required
manufacturer: Huawei Technologies Co., Ltd.
current-operator: vodafone TR
access-technology: Evolved 3G (LTE)
signal-strengh: -79 dBm
For example, let’s assume that you need to direct the LTE connection directly to the subnet, in this case, we will use the Passthrough feature.
[admin@MikroTik] > /interface lte apn add apn=internet passthrough-interface=ether1
[admin@MikroTik] > /interface lte set lte1 apn-profiles=internet
Suppose we need to define this differently for 2 interfaces. If the 1st port is down, let the 2nd port be activated.
In this case, thanks to this model, interfaces can output from the 1st or 2nd interface by using the 1 or 2nd apn.
[admin@MikroTik] > /interface lte apn add apn=apn1 passthrough-interface=ether1
[admin@MikroTik] > /interface lte apn add apn=apn2 passthrough-interface=ether2
[admin@MikroTik] > /interface lte set lte1 apn-profiles=apn1,apn2
Pulling information with AT Commands
You can use the following command to learn the Imei information of the LTE Interface.
[admin@MikroTik] > /interface lte at-chat lte1 input="AT*mrd_imei\?"
Modem Firmware update process and device’s LTE Firmware should be checked.
/interface lte info lte1 once
R11e-LTE version (“MikroTik _CP_2.160.000_v006”) is required. We take the modem to firmware Update mode.
/interface lte at-chat lte1 input="at+mififlag=1"
We expect the device to download its firmware from Mikrotik’s site (the file with about 5 Mb may take 3-4 minutes).
/interface lte at-chat lte1 input="at+func=18,2,\"http://mt.lv/ltefirmware.bin\""
If we want to view the download status:
/interface lte at-chat lte1 input="AT+CHECKATUPGRADE"
(Note: This download process is performed over the LTE modem, so the LTE device must be connected to 3G / 4G network.) When the update is complete, you should see a printout like the one below.
After completing the update process, we reset the LTE modem.
/interface lte at-chat lte1 input="at+reset"
After the reset, the LTE interface will disappear for 1-2 minutes and come back. if your query later.
/interface lte info lte1 once
You can see that the version has been updated as the R11e-LTE version (“MikroTik_CP_2.160.000_v008”).
Note that this process will be made easy in new versions, just like the RouterOS upgrade.
Warning: During this process, if the device is powered off or the internet connection drops because it cannot receive the update, there is a possibility that the LTE modem of your device is broken.
This may make the product out of warranty. You should be careful before doing this, or if you do not have enough information, I suggest you do not do this.
I hope it has been a useful article.