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ITU-T E-300 series Suppl. 1 (11/1988)

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List of possible supplementary telephone services which may be offered to subscribers
This supplement lists the different supplementary services that were foreseen in 1988 for ISDN networks.

Citation:	https://handle.itu.int/11.1002/1000/2
Series title:
Approval date:	1988-11-25
Approval process:	WTSA
Status:	In force
Maintenance responsibility:	ITU-T Study Group 2
Further details:	Patent statement(s)

EditionsRelated technical papers and reports

Ed.	ITU-T Recommendation	Status	Summary	Table of Contents	Download
4	E-300 series Suppl. 1 (11/1988)	In force	here	here	here
3	E-300 Suppl. 1 (10/1984)	Superseded	-	-	Not available
2	E-300 Suppl. 1 (11/1980)	Superseded	-	-	Not available
1	E Suppl.10 (10/1976)	Superseded	-	-	Not available