DIFF Subgroup
H04Q 5/22 the subordinate centre not permitting interconnection of subscribers connected thereto
Introduced: September 1968
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
No child classifications to compare. This is a leaf node in both IPC and CPC.