Introduction; Overview; Glossary - YX Series User Manual

 1 Introduction

1.1 Overview

A VoIP GSM Gateway (GoIP Gateway) is a device which reduces costs when calling from a fixed
telephone line to mobile network. It enables direct routing between IP, digital, analog and mobile
networks.
GoIP Gateway is now used more and more for telephone carriers to land their IP calls to mobile
network. In those areas where fixed line services are unavailable or much more expensive than the
mobile cost, GoIP Gateway is an irreplaceable alternative.
The following figure shows a basic topology of GoIP Gateway usage.

1.2 Glossary


VoIP: Voice over Internet Protocol.

SIP: Session Initial Protocol.

DTMF: Dual Tone Multiple Frequency.

IMEI: International Mobile Equipment Identity (with15 digits).

ASR: Answer Seizure Ratio.

ACD: Average Call Duration.

PDD: Post Dial Delay.

LCR: Least Cost Routing.

USSD: Unstructured Supplementary Service Data. GSM: Global System Communications.

CDMA: Code Division Multiple Access.

WCDMA: Wideband Code Division Multiple Access.
YX Technical department
GSM/CDMA/WCDMA VoIP Gateway
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