Hardware pinouts information and cables schemes

ITU-TSS X.21 interface specification users reports and reviews

[Discuss at the forum] [SUBMIT new pinout]

There are 5 approved reports in our database

Date Content
User opinion Comment Approved by moderator?
ERROR FIXEDNot shown Ga signal on the pinout, only in descruption.APPROVED
ERROR FIXEDAlso please check the Timing signals direction (shouldn"t it be from DCE to DTE?).APPROVED
ERROR FIXEDThis description says the electrical interface uses both balanced and unbalanced signals and at the pin chart says they are all balanced. Where is the disconnect? APPROVED
2016-06-07 14:28:49rev. 4INCORRECTI believe PIN 8/15 are incorrect. I believe them to be for Terminal Timing (Or it is named Ext Clock)APPROVED
2019-08-28 09:45:49rev. 4CORRECTAPPROVED

History of users contributions

Date Content
Author Comment
2012-05-05 22:33:07rev. 2

Back to ITU-TSS X.21 interface pinout

Pinouts.ru > Pinout of ITU-TSS X.21 interface and layout of 15 pin D-SUB female connector and 15 pin D-SUB female connector