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PCE
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Search for IPC and CPC classification codes or keywords
DIFF Subgroup Additional Only
H04M 2203/15

related to dial plan and call routing

Full Title

Aspects of automatic or semi-automatic exchanges > related to dial plan and call routing

Of 4 combined children, 0 exist in both systems.

4 codes are CPC-only extensions.

Note: 4 CPC extensions are marked as secondary classification only.