Research Output | Dar Al-hikmah Library | IIUM Only
This chapter describes the main heterogeneous networks (PSTN, SS7, ISDN, IP Network, WLAN, GSM, GPRS and UMTS) in terms of their components and services. These heterogeneous networks were designed to provide a specific service, which are initially distinct, and then converge into a single network. Voice over IP is a clear example of such convergent