IPC Subgroup
H04Q 5/22 the subordinate centre not permitting interconnection of subscribers connected thereto
Introduced: September 1968
Last revised: January 2006
Full Title
Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange > with indirect connection, i.e. through subordinate switching centre > the subordinate centre not permitting interconnection of subscribers connected thereto
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- SELECTING