What are the characteristics of Elvox switchboards?

Elvox telephone switchboards handle a maximum of 2 urban lines and 8 internal extensions. Extensions allow for the connection of analogue telephones, cordless telephones, a fax and an answer machine. Dialling can be either decadic or multifrequency. The maximum number of simultaneous conversations is 2 external, 2 internal and one interphone. The system has on-hold music and an interphone interface that allows the telephone to perform all the functions of the interphone system including door lock release as well as a further two auxiliary functions.