A control point for multi-call service between plural devices on a home network using a Universal Plug and Play, UPnP, the control point is configured to: transmit a plurality of requests for the media capability information of each of a telephony server, a first electronic device and a second electronic device; receive the media capability information from each of the telephony server the first electronic device and the second electronic device; and configure a first session between the telephony server and the first electronic device and a second session between the telephony server and the second electronic device based on the received media capability information, wherein the control point is configured to control the telephony server to: integrate a media stream received from outside of the home network and a media stream received from the first electronic device into a first integrated media stream for transmission through the second session configured based on the received media capability information; transmit the first integrated media stream to the second electronic device through the second session; integrate the media stream received from outside of the home network and a media stream received from the second electronic device into a second integrated media stream for transmission through the first session configured based on the received media capability information; and transmit the second integrated media stream to the first electronic device through the first session. transmit a plurality of requests for the media capability information of each of a telephony server, a first electronic device and a second electronic device; receive the media capability information from each of the telephony server the first electronic device and the second electronic device; and configure a first session between the telephony server and the first electronic device and a second session between the telephony server and the second electronic device based on the received media capability information, wherein the control point is configured to control the telephony server to: integrate a media stream received from outside of the home network and a media stream received from the first electronic device into a first integrated media stream for transmission through the second session configured based on the received media capability information; transmit the first integrated media stream to the second electronic device through the second session; integrate the media stream received from outside of the home network and a media stream received from the second electronic device into a second integrated media stream for transmission through the first session configured based on the received media capability information; and integrate a media stream received from outside of the home network and a media stream received from the first electronic device into a first integrated media stream for transmission through the second session configured based on the received media capability information; transmit the first integrated media stream to the second electronic device through the second session; integrate the media stream received from outside of the home network and a media stream received from the second electronic device into a second integrated media stream for transmission through the first session configured based on the received media capability information; and transmit the second integrated media stream to the first electronic device through the first session.