Connect cell phone to real GSM network through OpenBTS

  Dear Osmocom society,   I am trying to connect a cell phone (lets call it phone #1) through OpenBTS to real GSM network… To do so i have to introduce a osmocomBB phone which will be connected to my linux machine which runs OpenBTS So kind of it will be a following structure: Phone #1 → OpenBTS → OsmocomBB phone → real GSM netwok. No my goal is to have OpenBTS and OsmocomBB phone to talk to each other… for example authentication parameters which to be exchanged between phone #1 and real network to happen through the chain described above ….   Has this case been or something like this done before ? Or are you aware of any cases when OpenBTS and OsmocomBB phone exchange data?   Thank you very much     -- Mario Lucas