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== Pinout ==

[[Image:dsub25m.png]]

25 PIN D-SUB MALE at the DTE (Computer).

[[Image:dsub25f.png]]

25 PIN D-SUB FEMALE at the DCE (Modem).

CORRECT?

{| {{border}}
! Pin !! Name !! Dir        !! Description                     !! Circuit !! Paired with
|-
| 1   ||      || {{arrow}}  || Shield                          ||         || 18
|-
| 2   || TxD  || {{arrowr}} || Transmitted Data                || BA      || 14
|-
| 3   || RxD  || {{arrowr}} ||Received Data                    || BB      || 16
|-
| 4   || RTS  || {{arrowr}} || Request To Send                 || CA      || 19
|-
| 5   || CTS  || {{arrowr}} || Clear To Send                   || CB      || 13
|-
| 6   || DSR  || {{arrowr}} || Data Set Ready                  || CC      || 22
|-
| 7   || SGND || {{arrow}}  || Signal Ground                   || Ground  || 21
|-
| 8   || DCD  || {{arrowr}} || Data Carrier Detect             || CF      || 10
|-
| 9   ||      || {{arrowr}} || Rtrn Receive Sig. Elmnt Timing  || DD      || 17
|-
| 10  ||      || {{arrowr}} || Rtrn DCD                        || CF      || 8
|-
| 11  ||      || {{arrowr}} || Rtrn Transmit Sig. Elmnt Timing || DA      || 24
|-
| 12  ||      || {{arrowr}} || Rtrn Transmit Sig. Elmnt Timing || DB      || 15
|-
| 13  ||      || {{arrowr}} || Rtrn CTS                        || CB      || 5
|-
| 14  ||      || {{arrowr}} || Rtrn TxD                        || BA      || 2
|-
| 15  ||      || {{arrowr}} || Transmit Signal Element Timing  || DB      || 12
|-
| 16  ||      || {{arrowr}} || Rtrn RxD                        || BB      || 3
|-
| 17  ||      || {{arrowr}} || Receive Signal Element Timing   || DD      || 9
|-
| 18  || LL   || {{arrowr}} || Local Loopback                  || LL      || 1
|-
| 19  ||      || {{arrowr}} || Rtrn RTS                        || CA      || 4
|-
| 20  || DTR  || {{arrowr}} || Data Terminal Ready             || CD      || 23
|-
| 21  || RL   || {{arrowr}} || Remote Loopback                 || RL      || 7
|-
| 22  ||      || {{arrowr}} || Rtrn DSR                        || CC      || 6
|-
| 23  ||      || {{arrowr}} || Rtrn DTR                        || CD      || 20
|-
| 24  ||      || {{arrowr}} || Transmit Signal Element timing  || DA      || 11
|-
| 25  ||      || {{arrowr}} || Test Mode                       || TM      ||
|}

''Note: Direction is DTE (Computer) relative DCE (Modem).''

== Contributions ==

* [[User:Joakim|Joakim Ögren]]
* [mailto:woods@weird.com Greg A. Woods]

== Sources ==

* [http://www.made-it.com/CKP/rs530.html RS530 Page] at [http://www.made-it.com/CKP/ Connectivity Knowledge Platform (Made IT)]

[[Category:Connector]]