Overview of VoIP

Overview

An IMG can perform a two-way conversion between circuit-switched data (TDM) and packet-switched data (VoIP). A conversion is required if going from circuit switched data (TDM) to packetized voice applications such as the Voice over Internet Protocol (VoIP). Circuit-switched voice is converted to IP packets using compression algorithms that can increase capacity toward the IP network side. An IMG can also integrate media resources over IP technology. One of the benefits offered by the IMG is that it supports modifying the parameters of an individual call while the call is active. This enables capabilities such as being able to change the quality of service without losing a call.

 

Integrated Media Resources

Typically media resources are connected by T1, E1, or J1 interfaces that consume one 64 Kbps port per call. This can limit the capacity of the system. An IMG integrates media resources over IP using the standards-based Real-Time Protocol (RTP).

Integrating media resources using standards-based technology allows media resources to be shared between an IMG and other network infrastructure. Packet switching to media resources allows the application to benefit from voice compression and  increased capacity on the application. This flexibility allows an IMG and the applications to scale independently and incrementally as needed, which in turn can eliminate excess hardware.

 

Summary of IMG VoIP Features

VoIP Module SLM-IPM-1001R  - 128 milliseconds (Mindspeed Modules)

VoIP Module SLM-IPM-0001  - 64 milliseconds. (Older BroadCom Modules)