而解码器则是对应编码器的一个逆过程。
　　该例子成功编译运行后打印如下结果：
[CPC] testcase_started: Basic_TC() return <NULL>
[CPC] component_created: MyMTC.create('MTC')
[CPC] component_started: 'MTC'.start(Basic_TC() return <NULL>)
Codec_A.ttcn (18): [MTC] scope_entered: Basic_TC() return <undefined>
Codec_A.ttcn (25): [MTC] port_mapped: 'MTC':mtc_port <-> SYSTEM:sut_port
Codec_A.ttcn (31): [MTC] sut_message_sent: mtc_port.send ('ABCD'O)
Codec_A.ttcn (33): [MTC] sut_message_received: mtc_port.receive ('ABCD'O)
Codec_A.ttcn (34): [MTC] local_verdict_changed: setverdict(pass)
Codec_A.ttcn (35): [MTC] scope_left: Basic_TC() return <undefined>
[MTC] component_stopped: 'MTC' stopped
[CPC] local_verdict_changed: setverdict(pass)
[CPC] local_verdict_changed: setverdict(pass)
[CPC] testcase_ended: Basic_TC() return <NULL> => pass ()
[CPC] testcase_verdict: 'Basic_TC' => pass ()
[final] MESSAGE   Test case summary:
[final] MESSAGE
[final] MESSAGE   none          0 (0%)
[final] MESSAGE   pass          1 ()
[final] MESSAGE   inconc        0 (0%)
[final] MESSAGE   fail          0 (0%)
[final] MESSAGE   error         0 (0%)
[final] MESSAGE
[final] MESSAGE   total         1
　　结果中略去了编解码中检验的打印代码