IPC Subgroup
H04Q 1/28 Current-supply circuits or arrangements for selection equipment at exchanges
Introduced: September 1968
Last revised: January 2006
Full Title
Details of selecting apparatus or arrangements > Electrical details > Current-supply circuits or arrangements for selection equipment at exchanges
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- SELECTING