Ecma International Home
contact us
Ecma Site Map
What is Ecma Activities News Standards


Standard ECMA-194
Private Integrated Services Network (PISN) - Inter-Exchange Signalling Protocol - Do Not Disturb and Do Not Disturb Override Supplementary Services (QSIG-DND(O))

4th edition (December 2001)

The latest edition of this Ecma Standard is available here.

You can download the previous replaced "historical" editions of this Ecma Standard, free of charge:

File name Content
ECMA-194 1st edition NOT AVAILABLE
ECMA-194 2nd edition Acrobat (r) PDF file
ECMA-194 3rd edition Acrobat (r) PDF file

Back Back





only search Ecma International

Level A conformance icon, 
          W3C-WAI Web Content Accessibility Guidelines 1.0