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Inventor: Abe; Takahiro
Address: Fukushima-ken, JP
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 7577135 |
IP telephone system |
August 18, 2009 |
| When a trouble is developed in an IP exchange (TM) 2 or a circuit (network) 5, a backup exchange 6 (backup TM) is switched over from a waiting system to an operating system, and all IP terminals Eqi inside lodgments A, B, . . . N also log out from the IP exchange (TM) 2, and transmit |
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