Private Integrated Services Network (PISN)
- Inter-Exchange Signalling Protocol - Single Step Call Transfer
Supplementary Service (QSIG-SSCT)
2nd edition (December 2001)
The latest edition of this Ecma Standard is available here.
You can download the previous replaced "historical" edition of this Ecma Standard, free of charge:
|ECMA-300 1st edition
||Acrobat (r) PDF file