The four men were charged with malicious intent to damage the phone system. Table created according to the "3CX Phone System Build History". In 1919 Southern Bell made improvements to the phone system. RingCentral provides a cloud-based business phone system. In 2015, Citrix acquired Grasshopper, a virtual phone system provider. However, the security of this scheme depends on the security of the mobile phone system. Early shows often included technical issues with the phone system, computers, streaming and audio. Other phone system vendors are now also offering these features for internal voicemail users. The first fully automated mobile phone system for vehicles was launched in Sweden in 1956. The terminal may also be independently connected to banks through the public phone system. One of the 48 recommendations from that inquest included changing the phone system in jail. It eponymises the Thuraya satellite phone system of the United Arab Emirates. Gatlinburg's emergency operations center phone system went down when it lost power. The first 911 emergency phone system went into use in Haleyville, Alabama in 1968.