Integrated Services Digital Network (ISDN);Application of the ISDN User Part (ISUP) of ITU-T Signalling System No. 7 (SS7) for international ISDN interconnections (ISUP version 1) Amendment 1: International Emergency Preference Scheme (IEPS) service [ITU-T Recommendation Q.767Amendment 1 (2002), modified] (Endorsed by Asociación Española de Normalización in July of 2021.)
| AENOR | |
|---|---|
| Product Category | Standards and Technical Documents |
| Product Name | UNE-EN 300121 V1.2.1 |
