These numbers are very similar, but they are designed to solve completely different tasks.
"112" must be dialed if you need the help of emergency services when there is a real threat to life, health, property or the environment.
It is necessary to call the short number "122" in cases where you need to call a doctor at home, make an appointment with a doctor, or reschedule (mark) a doctor's appointment. This number is also used to receive information on contract service issues. To provide immediate, prompt medical care, please call "112" or "103".
"117" is the telephone number of the hotline of the Ministry of Defense of the Russian Federation for conducting a special military operation. By calling "117", you can get advice on a wide range of issues, including the terms of the contract, the procedure for payments, benefits, etc. It is worth noting that calls to the numbers are free of charge.
Remember that by making calls to "112" for non-urgent matters, you may delay providing assistance to a person who really needs it.