Abstract: Intellectual mobile lethals of forthcoming era wireless networks initiate/Establish VoIP calls via H.323 else SIP. For providing excellence metrics for video conferences, telemedicine and other voice over broadband telephony (VoBB) applications. This work, analyses performance of H.323 in wireless medium. Operation modes are called over heterogeneous networks. The proposed model application layers in the RTP Control Protocol and RTCP protocols used in two different modes of call established. Advised model provides call set-up act, jitter and delay in peer to peer networks. Analytical upshots vindicate the creation of this study.