Patent Number: 8,817,775

Title: Access gateway and method of operation by the same

Abstract: An access gateway containing IP telephone service functions for subscribers under an integrated access device (IAD), forming a PSTN network side speech path or IP network side speech path selectively for each subscriber, and, further automatically switching, when trouble occurs at the IP network side, the IP network side speech path to the PSTN network side speech path.

Inventors: Hayama; Isamu (Kawasaki, JP)

Assignee: Fujitsu Limited

International Classification: H04L 12/66 (20060101); G06F 15/173 (20060101); H04M 7/00 (20060101)

Expiration Date: 8/26/12018