Cost effective communication with the electronic, microprocessor-controlled SPC telephone system EMS

A telephone system, installed in a company of some 10,000 employees, is described. It was selected above all to replace the series-connected telephones previously used and to standardize the terminal units. The high degree of versatility of the EMS system is emphasized. Significant qualitative advantages include: better organized telephone traffic; the system can be easily expanded; automatic charge registration; and users are more easily reached. Quantitative advantages are: less space required due to miniturization of electronic components; reduced equipment rental with the removal of the series-connected telephones; and increased system security due to self-supervision and fault diagnosis programs.