Patent ID: 7068664
Filing Date: 2006-06-27
Classification: H04L,H04Q

Abstract:
1. A voice interception system for intercepting a voice signal included in an Asynchronous Transfer Mode (hereinafter referred to as “ATM”) cell transferred in an ATM Adaptation Layer type 2 (hereinafter referred to as “AAL2”) of an ATM network, comprising: base station controllers; a mobile switching station comprising: a voice monitor which generates an ATM cell of an ATM Adaptation Layer type 1 for reproducing a voice signal (hereinafter referred to as “AAL1 (PCM)”) based on the ATM cell of the AAL2pf from said plurality of ATM cell assembler/de-assembler units; an ATM switch; and a third party call apparatus which converts the ATM cell of the AAL1 (PCM) sent from said voice monitor through a Synchronous Transfer Mode (hereinafter referred to as “STM”) network to the voice signal, wherein said ATM switch sets a first path in which the ATM cell of the AAL2pf from one of said plurality of ATM cell assembler/de-assembler units is sent to another one of said plurality of the ATM cell assembler/de-assembler units, and sets a second path in which the ATM cell of the AAL2pf passing through the first path is drawn into said voice monitor, and sets a third path in which the ATM cell of the AAL1 (PCM) from said voice monitor is sent to said the third party call apparatus through said STM network; and a vocoder for carrying out a mutual conversion between the ATM cell of the AAL2pf and an ATM cell of an Adaptation Layer type 1 for the Tandem Free Operation (hereinafter referred to as “AAL1 (TFO)”), wherein said voice monitor converts the ATM cell of the AAL2pf from said plurality of the ATM cell assembler/de-assembler units to the ATM cell of the AAL1 (PCM) in a non-Tandem Free Operation case, and converts the ATM cell of the AAL1 (TFO) from said vocoder to the ATM cell of the AAL1 (PCM) in a Tandem Free Operation case.