Raspberry Pi SBC

Step 1: Add the SBC in 3CX

1. In the 3CX “Management Console” go to “SIP Trunks”.
2. Click “Add SBC” and provide a name for it, e.g. “Denver Office”.
3. Now the SBC link will be created. Take note of the “Authentication KEY ID” and the “Provisioning URL”. These will be required for Step 6.

Step 2: Get the correct Raspberry Pi

• A Raspberry PI 4 B4 or B8
• 32+GB Class 10 Micro SDHC
• Raspberry Pi-compatible 2.5 Amp Micro USB power supply
• Ensure the device has a good casing that allows for maximum cooling

The following Raspberry Pi Shops have “3CX Ready” Raspberry Pis with Raspbian pre installed on the SD card:

• Pimoroni – 3CX PBX Kit. (UK based, ships to UK, EU & worldwide)
• Canakit – 3CX PBX Kit (Ships to USA and Canada)

Step 3: Prepare the SD card with Raspbian

1. Download the Raspbian image.
2. Extract the image (.img) file from the downloaded archive.
3. Burn the Raspbian image file via Etcher.
4. Place empty ssh file in the root directory to enable ssh access on pi – raspberry

Step 4: Install Raspbian and set Hostname

1. Insert the SD card in the Raspberry Pi memory card slot and power the device to boot.
2. Wait for the boot process to complete and login with the default user “pi” and password “raspberry”.
3. Run the Raspbian configuration utility with the command:
   sudo raspi-config
4. Select “1. System Options” and press the <Enter> key.
5. Select “S4 Hostname”, press the <Enter> key and then “OK” on the warning dialog.
6. Enter the Pi’s hostname using only alphanumeric characters and dashes (“-”).
7. Select <Finish> and then <Yes> to reboot and apply the hostname configuration.

Step 5: Set a Static IP

1. Edit the “/etc/dhcpcd.conf” file to configure the ethernet interface “eth0” with the nano editor:
   sudo nano /etc/dhcpcd.conf
2. Scroll to the end of the file and add the following lines, making sure to replace the values for “interface”, “ip_address”, “routers” (gateway) and “domain_name_servers” based on your LAN settings:

Note: LAN installs are supported on properly configured RFC 1918 private networks, i.e. 172.16.0.0 /10.0.0.0/192.168.0.0 IP range.

3. Press the “Ctrl” + “x” key combination, then “y” and <Enter> to confirm writing changes to the file.
4. Reboot the Pi using:

5. When the Pi boots again, login with “pi” user and verify “eth0” IP address with the command:

Step 6: Install 3CX SBC

1. Login as user “pi” via the CLI or SSH
2. Run the 3CX install script:
   wget http://downloads-global.3cx.com/downloads/sbc/3cxsbc.zip -O- | sudo bash

   .

3. Select <OK> to verify the “3CX Pre-requisites” and accept the “End-user License Agreement” to continue.
4. Enter the “Provisioning URL” for your 3CX, e.g. https://mycompany.3cx.com:5001, and select <OK>.
5. Enter the “Authentication KEY ID” and select <OK>.
6. Select <OK> and proceed to install and restart.

Step 7: Provision your IP Phones

Once your SBC is installed, you can provision your IP Phones using the PnP provisioning method. See this guide on how to provision your IP Phones.