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ITU-T V.21 (1976) Amd. 1 (09/1977)

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Citation:	https://handle.itu.int/11.1002/1000/10670
Series title:	V series: Data communication over the telephone network V.10-V.34: Interfaces and voiceband modems
Approval date:	1977-09-15
Approval process:	TAP
Status:	Superseded
Maintenance responsibility:	ITU-T Study Group 21
Further details:	Patent statement(s)

Editions

Ed.	ITU-T Recommendation	Status	Summary	Table of Contents	Download
4	V.21 (11/1988)	In force	-	-	here
3	V.21 (10/1984)	Superseded	-	-	Not available
2	V.21 (11/1980)	Superseded	-	-	Not available
1.1	V.21 (1976) Amd. 1 (09/1977)	Superseded	-	-	Not available
1	V.21 (10/1976)	Superseded	-	-	Not available