Hi.
There are three PBX "A" "B" "C". From the city PSTN TELECOM, with PBX"A" comes to the number 89222519999 ROU150,
goes to the analog number 3888, this number does transfer to the extension PBX"C" number 3357.
When transiting on the PBX"B" removed the last digit in the room, comes 89222519999...