DIFF Subgroup
H04M 5/10 using separate plug for each subscriber
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Manual exchanges > using separate plug for each subscriber
CPC:
Manual exchanges (substation equipment in general H04M1/00) > using separate plug for each subscriber
No child classifications to compare. This is a leaf node in both IPC and CPC.