Patent ID: 7983403
Filing Date: 2011-07-19
Classification: H04L

Abstract:
1. A communication apparatus comprising: a communicator configured to communicate with a first terminal apparatus and with a second terminal apparatus, said communicator receiving a signal from the first terminal apparatus; an operating section configured to be operated by a user of said communication apparatus; an operation detector configured to detect operation of said operating section by the user in response to the signal; and a controller configured to transmit, to the second terminal apparatus, presence information indicating that said operation detector does not detect the operation of said operating section within a predetermined time period after said communicator receives the signal from the first terminal apparatus, wherein the predetermined time period comprises first and second different predetermined time periods, said controller being configured to transmit, to the second terminal apparatus, first presence information indicating that said operation detector has detected the operation of said operating section within the first predetermined time period after said communicator receives the signal from said first terminal apparatus, said controller being further configured to transmit, to the second terminal apparatus, second presence information indicating that said operation detector has not detected the operation of said operating section within the first predetermined time period and, to transmit to the second terminal apparatus, third presence information indicating that said operation detector has not detected the operation of said operating section within the second predetermined time period.