CME Gateway (CME22-2n-BG77)

Safety Warnings

Before you work on any equipment, be aware of the hazards involved with electrical circuitry, and be familiar with standard practices for preventing accidents.
Ultimate disposal of this product should be handled according to all national laws and regulations.
The Installation of the equipment must comply with local and national electrical codes.
This unit is intended to be installed in the rackmount. Please read the mounting instructions carefully before beginning installation. Failure to use the correct hardware or to follow the correct procedures could result in a hazardous situation for people and damage to the system.
This product is intended to be installed indoors. Keep this product away from water, fire, humidity, or hot environments.
Use only the power supply and accessories approved by the manufacturer, and which can be found in the original packaging of this product.
Read the installation instructions before connecting the system to the power source.
We cannot guarantee that no accidents or damage will occur due to the improper use of the device. Please use this product with care and operate at your own risk!
In the case of device failure, please disconnect it from power. The fastest way to do so is by unplugging the power plug from the power outlet.
It is the customer's responsibility to follow local country regulations, including operation within legal frequency channels, output power, cabling requirements, and Dynamic Frequency Selection (DFS) requirements. All Mikrotik radio devices must be professionally installed.

Exposure to Radio Frequency Radiation: This MikroTik equipment complies with the FCC, IC, and European Union radiation exposure limits set forth for an uncontrolled environment. This MikroTik device should be installed and operated no closer than 20 centimeters from your body, occupational user, or the general public.

Connecting

• Make sure your Internet service provider is allowing hardware change and will issue an automatic IP address.
  

• Connect your ISP cable to the first Ethernet port or, if cellular CAT-M connection is required, open the bottom section and install the SIM card into the respective SIM slot;

• Connect the device to the power source;
• Open network connections on your computer, search for MikroTik wireless network and connect to it, or, connect your PC to the second Ethernet port;
  
• The configuration can to be done through the wireless network using a web browser or mobile app, or through the Ethernet connection using a web browser. Alternatively, you can use a WinBox configuration tool https://mt.lv/winbox;
• Open http://192.168.88.1 in your web browser to start configuration, user name: admin and there is no password by default (or, for some models, check user and wireless passwords on the sticker);
• Click the Check for updates button and update your RouterOS software to the latest version, must have an active Internet connection;
• In the Quick Set, choose your country and apply country regulation and wireless settings;
• Set up your wireless network password;
• Set up your router password.

Powering

• Ethernet port accepts 802.3af/at Power over Ethernet 18-57 V DC.
• 2-pin terminal input Voltage 12-57 V DC.

The power consumption under maximum load with attachments can reach 31 W. Max power consumption without attachments 6W.
Connecting to a PoE Adapter:

1. Connect the Ethernet cable from the device to the PoE+DATA port of the PoE adapter.
2. Connect an Ethernet cable from your local network (LAN) to the PoE adapter.
3. Connect the power cord to the adapter, and then plug the power cord into a power outlet.

Configuration

Once logged in, we recommend clicking the "Check for updates" button in the QuickSet menu, as updating your RouterOS software to the latest version ensures the best performance and stability. For wireless models, please make sure you have selected the country where the device will be used, to conform to local regulations.
RouterOS includes many configuration options in addition to what is described in this document. We suggest starting here to get yourself accustomed to the possibilities: https://mt.lv/help. In case an IP connection is not available, the Winbox tool (https://mt.lv/winbox) can be used to connect to the MAC address of the device from the LAN side (all access is blocked from the Internet port by default).
For recovery purposes, it is possible to boot the device for reinstallation, see section Buttons and jumpers.

Extension slots and ports

• 2.4 GHz, 802.11b/g/n, antenna gain 2 dBi.
• Built-in GPS module (GPS, GLONASS, BeiDou, Galileo).
• Two 10/100 Ethernet ports, supporting automatic cross/straight cable correction (Auto MDI/X). Either straight or crossover cable can be used for connecting to other network devices. The Ethernet port accepts 18-57 V DC power from an 802.3af/at PoE injector.
• One nano SIM slot.

GPS and CAT-M

A port named "modem" is used for cellular connection (serial/PPP connection) and GNSS NMEA data: 

/port print     
Flags: I - INACTIVE
Columns: NAME, CHANNELS, BAUD-RATE
#  NAME   CHANNELS  BAUD-RATE
0  modem         4     115200

Default modem port channel assignment:

1 - GNSS NMEA output port;

2 - AT/modem port;

Cellular configuration

Unlike LTE devices, the BG77 modem by default does not provide a direct IP modem interface (LTE interface), but provides AT/modem serial port which is used for serial/PPP connection. 

The device has a serial/PPP connection preset:

/interface ppp-client print
Flags: X - disabled; R - running 
 0 R  name="ppp-out1" max-mtu=1500 max-mru=1500 mrru=disabled port=modem data-channel=2 info-channel=2 apn="internet" 
      pin="" user="" password="" profile=default phone="" dial-command="ATDT" modem-init="AT+QGPSCFG="priority",1" 
      null-modem=no dial-on-demand=yes add-default-route=yes default-route-distance=2 use-peer-dns=yes keepalive-timeout=30 
      allow=pap,chap,mschap1,mschap2                       

For more details on serial/PPP connection please check the link.

GNSS configuration

You can find more information by checking the guide here.

BG77 modem shares the same receiver for IoT cellular connectivity and GNSS signal reception. The preferred service can be prioritized by using the modem-init string (configured under /interface ppp-client) and GNSS service init-string (configured under /system gps).

AT commands are:

AT+QGPSCFG="priority",0 → to prioritize GNSS;
AT+QGPSCFG="priority",1 → to prioritize cellular IoT connectivity;

AT+QGPS=0 → to stop GNSS reception;
AT+QGPS=1 → to start GNSS reception.

Buttons and jumpers

Reset button

• Hold this button during boot time until the LED light starts flashing, release the button to reset RouterOS configuration (total 5 seconds).
• Keep holding for 5 more seconds, LED turns solid, release now to turn on CAP mode. The device will now look for a CAPsMAN server (total 10 seconds).
• Or keep holding the button for 5 more seconds until LED turns off, then release it to make the RouterBOARD look for Netinstall servers (total 15 seconds).

Regardless of the above option used, the system will load the backup RouterBOOT loader if the button is pressed before power is applied to the device. Useful for RouterBOOT debugging and recovery.

Accessories

The package includes the following accessories that come with the device:

Operating system support

The device supports RouterOS software version v7. The specific factory-installed version number is indicated in the RouterOS menu /system resource. Other operating systems have not been tested.