Integrated Services Digital Network (ISDN);Signalling System No.7;Signalling interworking specification for ISDN User Part (ISUP) version 1 (Endorsed by Asociación Española de Normalización in June of 2022.)
| AENOR | |
|---|---|
| Product Category | Standards and Technical Documents |
| Product Name | UNE-ETS 300343 Ed1 |
