旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 컴컴컴컴컴�� Four common examples of RS-232 'null modem ' cabling. �쿢se for computer/computer or computer/peri pheral (DTE/DTE)�CONNECTOR 읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 컴컴컴컴컴컴컴컴컴컴컴컴� PIN/25 /9 FUNCTION(A) (B)(C)(D)旼컴컴컴컴커 旼컴컴컴컴커 旼컴컴컴 컴커 旼컴컴컴컴커 1 Frame Ground...  FG �컴컴컴컴컴� �컴컴컴컴컴 � �컴컴컴컴컴� �컴컴컴컴컴�  2-3 Transmitted Data TxD   �컴컴� 旼컴� �컴컴� 旼컴� � 컴컴� 旼컴� �컴컴� 旼컴� 3- 2 Received Data RxD <�<� 컴읕컴� � �<컴�읕컴� � �<컴� 읕컴� � �<컴�읕컴� � 4- 7 Request To Send RTS   �컴컴� 旼컴� �컴� 旼� � �컴� 旼�� �컴� � � � 5-8 Clear To S end CTS <�<컴�읕컴� � � <캑 쳐 � �<��커旼 �� � �<켸 읕 �  6-6 Data Set Ready  DSR <�<컴커旼컴 � �<컴커旼� � � �<캑 �� 쳐 � � <컴커� � � 7-5 Signal  Ground... SG �컴컴��컴컴 � �컴������컴 � �컴������컴 � �컴컴� 컴컴� 8-1 D ata CarrierDCD <�<커 � � 旼 � �<�����켸 � � �<켸 �� 읕  � �<컴캑� � �Detect | � �� � | | 읕� �컴� | | �� | | � |20-4 Data Terminal  DTR  �컴좔읕컨컴� �컴컴읕컴 컴� �컴컴읕컴컴� �컴컴�� � �� Ready읕컴컴컴컴켸 읕컴컴컴컴켸 읕컴컴컴컴켸 � 컴컴컴컴컴�(A) Hardware handshaking.(B) Partial h andshaking.(C) Minimal handshaking.(D) No handshaking.  Only the PC side may need the loopback Downloaded From P-80 International Information Systems 304-744-2253