Bayer, Michael
Computer telephony demystified: putting CTI, media services, and IP telephony to work
McGraw-Hill, 2000
 Buku Teks
The carrier IP telephony 2000: comprehensive report
International Engineering Consortium
International Engineering Consortium, 2000
 eBooks
Faizal Firmansyah
Analisa pengaruh enkripsi terhadap QOS pada GRE/IPSEC VPN untuk implementasi IP - based video telephony = Analysis of encryption towards QoS on GRE/IPSec VPN to implement the IP-based video telephony
Fakultas Teknik Universitas Indonesia, 2009
 UI - Skripsi (Open)
Muhammad Idris
Perencanaan proyek implementasi aplikasi Sistem Informasi Call Center berbasis IP Telephony pada komisi pemberantasan korupsi (KPK)
Fakultas Ilmu Komputer Universitas Indonesia, 2007
 UI - Tesis (Membership)
The 1999 carrier IP telephony comprehensive report: technologies, architectures, deployments, and business issues
The International Engineering Consortium
Professional Education International, 1999
 eBooks