Glossar Abkürzungen / Thema
Empfehlung der CCITT/ITU von 91-92: Stage 2 description for call completion supplementary services Clause 1 (09/91) Call waiting (CW) Clause 2 (02/92) Call hold Clause 3 (1988) Terminal portability.
Permanenter Link Q.83 - Erstellungsdatum 2021-01-20