The IPBX service is a telephone exchange which to all intents and purposes is hosted by a server for which was developed the TRIXBOX© application that was evolved on Linux by Mark Spencer of Digium™ (company that owns Asterisk). Through software configuration it is possible to implement many telephone services, from the classic call forwarding up to a voice mailbox by way of email.

By means of data network (Ethernet) it is possible to connect IP phones or traditional phones to the server, by using adapters (ATA) that perform the role of protocol converters. It's not necessary that the phones or devices that should be connected with the exchange, physically have to be in the same location as the IPBX exchange: by using the Internet it's possible to dispose of number mobility (for example a number of peripheral office "B" can be remote managed by main office "A" where the server is installed on which the sw, that manages the service, is present).

IPBX is equipped with backup cards (1 PRI, 4 POTS or 2 ISDN) or a data backup solution (alternatively to the backup of traditional telephony) through UMTS/HSDPA connection.