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PCE
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DIFF Subgroup
H04M 19/06

in which current supply sources at subordinate switching centres are charged from the main exchange

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Current supply arrangements for telephone systems > in which current supply sources at subordinate switching centres are charged from the main exchange

CPC:

Current supply arrangements for telephone systems (for selecting-equipment H04Q1/28) > in which current supply sources at subordinate switching centres are charged from the main exchange

No child classifications to compare. This is a leaf node in both IPC and CPC.