Patent ID: 7200220
Filing Date: 2007-04-03
Classification: H04M,H04W

Abstract:
1. A communication system between a portable telephone set having a memory and a general telephone set via an exchange network, comprising: a portable telephone service system having a maintenance service center that is accessible via said exchange network from said portable telephone set and said general telephone set, and said maintenance service center including a backup memory and a controller, wherein a backup control request, including a code and a number of said portable telephone set that are entered by an authorized person having the code and the number of said portable telephone set, performs control to save said portable telephone set's memory dial data, mail address data, and other input-set data in said backup memory and erase said data stored in said portable telephone set's memory and said maintenance service center further includes a dialing unit configured to dial a number of said portable telephone set to connect with said portable telephone via the exchange network.