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 |
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