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Used to verify that a port is working. It´s the same as [http://www.hardwarebook.info/Serial_Port_Loopback_%289_Norton%29 9 Norton]. This one works with [http://www.smithmicro.com/checkit/ CheckIt] from [http://www.smithmicro.com Smith Micro] and Norton Diagnostics.

== Pinout ==

[[Image:dsub9f.png]]

9 PIN D-SUB FEMALE to Computer.

{| {{border}}
! Name !! Pin !! Pin !! Name
|-
| CD   || 1   || 6   || DSR
|-
| CD   || 1   || 9   || RI
|-
| RXD  || 2   || 3   || TXD
|-
| DTR  || 4   || 6   || DSR
|-
| RTS  || 7   || 8   || CTS
|}

== Contributions ==
* [[User:Joakim|Joakim Ögren]]
* [mailto:coolsys@geocities.com "Coolsys"]

[[Category:Cable]]
[[Category:Serial]]