Whats this telex number business all about?

I still need to apply for my visa because i'm going away for two months to study russian at moscow state.

I'm just a little worried because i had a friend stay from croatia recently and i had to send an official invitation to him. I'm a little suspicious at just having this number because i thought that Russia was supposed to be very bureaucratic.

Basically what i want to know is, Is this number all i need from the university i'm staying with to be able to stay in Russia?