“Cloud PBX” is practically the same as the telephone system, only it
works within the Internet means, not the simple telephone line. Using this
service you don’t have to worry about how flexible and reliable is your
telephone system anymore.
Citel PBXgateways are installed at the central PBX location, and EXTenders are deployed at branch offices, call centers, or at home offices over managed IP connections, DSL, cable, or analog circuits