Physical Layer Interface Standards (PSTN) â¢ EIA RS-232-C/D The ...

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Line designationCCITT circuit125 RI108 DTR111 TxClk114 TxClk115 RxClk109 CD102 SIG107 DSR106 CTS105 RTS104 RxD103 TxD101 SHGPin222016151787654321Ring Indication RIData Terminal Ready DTRTransmit Data Timing DTE SourceTransmit Data Timing DCE SourceReceive Data TimingCarrier Detect CDSignal Ground SIGData Set Ready DSRClear To Send CTSRequest To Send RTSReceive Data RxDTransmit Data TxDShield Ground SHG◊ RS-232-D (1987) defines extra signals for loopback testing
Connector designation◊ Under RS-232-C a number of connector may be used the most common being theDB25 (ISO 2110)◊ RS-232-D specifies this connector only1DTE connector25125DCE connector
Page 1: Physical Layer Interface Standards
Page 5 and 6: • V.24◊ Defined by CCITT◊ RS-
Page 7 and 8: • RS-423-A◊ An electrical stand
Page 9 and 10: • EIA-530◊ Uses RS-422 and RS-4
Page 11: OverviewITU - T V seriesTelephoneV.

Physical Layer Interface Standards (PSTN) â¢ EIA RS-232-C/D The ...

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Physical Layer Interface Standards (PSTN) â¢ EIA RS-232-C/D The ...