EVALUASI DAN ANALISIS PERFORMANSI PEER TO PEER SESSION INITIATION PROTOCOL (P2PSIP) PADA LAYANAN VOICE OVER INTERNET PROTOCOL(VOIP) EVALUATION AND ANALYSIS OF PERFORMANCE PEER TO PEER SESSION INITIATION PROTOCOL (P2PSIP) FOR VOICE OVER INTERNET PROTOCO - Sandy Purniawan (Universitas Telkom, 2011)