METHOD AND SYSTEM FOR PROVIDING SECOND GENERATION (2G) VOICE SERVICES VIA THE INTERNET PROTOCOL

摘要

A system for providing second generation (2G) voice services over the internet protocol, the system comprising: a voice gateway (VGW) containing a 2G stack for communicating control plane information and user plane information with a 2G user terminal (UT) via a circuit-switched network to communicate without changes to the 2G user terminal; an Iu-CS-IP stack and a relay for mapping the control plane information between the 2G stack and the Iu-CS-IP stack and vice versa; a mobile switching center (MSC) connected to the voice gateway via the Iu-CS-IP stack to manage and set up voice services between the 2G user terminal and a public switched telephone network (PSTN) based on the associated control plane information; and a media gateway (MGW), which is connected to the voice gateway (VGW) via the Iu-CS-IP stack, the media gateway (MGW) providing the user level information between the 2G user terminal (2GUT) and the public telephone network (PSTN) communicates after the mobile switching center (MSC) 2-G user terminal vocoder, e.g. AMBE, has set up voice services.