| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a voice switch system that can easily cope with the occurrence of a fault or disaster. SOLUTION: The voice switching system has a gate keeper 4 that controls phone voice data; a gateway 5 accommodating public lines; LAN switches 1, 2 that contain an internet connection router 3; a power supply function that houses analog or digital phones 8-1, 8-2 contained in the LAN switches via two-wire telephone lines 7-1, 7-2 and supplies power to the phones; line cards 6-1, 6-2 that have the switching connection function that maintains power supply from a backup power supply on the occurrence of a power failure and selects and connects the phones to the public line on the occurrence of power supply stop by the backup power supply and further have an interface function to the LAN.</p> |
