The
service allows you to check the voice mail not being by the phone or computer where the mail
comes. All one has to do is dial a special number (usually given by the
communication provider) and listen to voice mails.
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