CTS

How to set up a Raspberry Pi with connection with a CTS

Hardware requirements

• Raspberry Pi (4 is ideal, 2GB is ok), with PSU and SD card
• icE1USB
• A CTS (DUH)

Software setup

1. Prepare an SD card with a 64-bit Raspbian Bullseye (Debian 11)
   
2. Update/Upgrade the OS after boot:
   

   sudo apt get update && sudo apt upgrade
   reboot

   
   
3. Add the Osmocom repo, as per Osmocom's documentation:
   

   sudo su
   OSMOCOM_REPO="https://downloads.osmocom.org/packages/osmocom:/latest/Debian_11" 
   wget $OSMOCOM_REPO/Release.key
   mv Release.key /etc/apt/trusted.gpg.d/osmocom-latest.asc
   echo "deb [signed-by=/etc/apt/trusted.gpg.d/osmocom-latest.asc] $OSMOCOM_REPO/ ./" > /etc/apt/sources.list.d/osmocom-latest.list
   apt get update

4. Install Osmocom E1D:
   

   sudo apt install osmo-e1d

5. Add the TetraPack repository:
   

   wget https://packages.tetrapack.online/install/public.key
   mv public.key tetrapack.asc
   sudo apt-key add tetrapack.asc
   sudo echo "deb [arch=arm64] http://packages.tetrapack.online/repository/ bullseye main" > /etc/apt/sources.list.d/tetrapack.list
   sudo apt update

6. Install TetraPack dummy and cts-logcollector
   

   sudo apt tetrapack-dummy cts-logcollector

7. Before going any further, read this!
8. Plug in the icE1USB, recover the interface serial number:
   

   sudo lsusb -d 1d50:6145 -v 2> /dev/null | grep iSerial

9. Open (with for instance nano) /etc/osmocom/osmo-e1d.cfg, copy/paste this:
   

   log syslog daemon
   e1d
   interface 0 icE1usb
   usb-serial [interface serial number]
   line 0

10. Reload the service:

    sudo systemctl restart osmo-e1d