Hello, I'm new here in this forums and i need your experience in doing 3CX projects. I have a 3CX PBX with DIDs and extension in London and i need to made a call center in Cairo. 1. Should i install another 3CX-PBX in Cairo and connect it to the main PBX ? or i can setup remote extensions in Cairo? 2. What about the communication between the two sites, i'm comparing between PRI "ISDN" and leased lines. can you help me to compare between them, which one can give me best quality and least rate for billing ?