Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2006-06-27
2006-06-27
Lee, Andrew C. (Department: 2663)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S395610, C370S395640, C370S474000
Reexamination Certificate
active
07068664
ABSTRACT:
In a voice interception system, a voice is intercepted by applying a function of a vocoder installed in a voice signal processor to a mobile switching station. This interception implies a conversion between an ATM cell of an AAL2pf, an AAL2, and an AAL1 (PCM), and a conversion between an ATM cell of an AAL2pf and an AAL1 (TFO) in a TFO case. The ATM cell of the AAL2 in the ATM network is picked up from an ATM switch and is intercepted. If a voice TFO CODEC method is used, the above functions are applied to a voice monitor and a voice signal, during a telephone call between mobile stations, is intercepted. It is possible with the disclosed invention to carry out a voice interception only by controlling the ATM switch without individual control of both the ATM switch and an STM switch.
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Lee Andrew C.
NEC Corporation
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