| 摘要 |
A call is set up between a first communication device ( 101 ) and a second communication device ( 115 ) on a first communication path ( 117 ), via an asynchronous transfer mode (ATM) network ( 105 ). A second communication path ( 203 ) is established from the ATM network ( 105 ) to a law enforcement agency ( 201 ), which second communication path comprises audio sourced by the first communication device ( 101 ) on the first communication path ( 117 ). A third communication path ( 205 ) is established from the ATM network ( 105 ) to the law enforcement agency ( 201 ), which third communication path ( 205 ) comprises audio sourced by the second communication device ( 115 ) on the first communication path ( 117 ). The audio sourced by the first communication device ( 101 ) and the audio sourced by the second communication device ( 115 ) are replicated by an ATM switch ( 107 ) in the ATM network ( 105 ).
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