CPC Subgroup Additional Only
H04M 2207/20 hybrid systems
Full Title
Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place > hybrid systems
2 direct subcodes
Child Classifications
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- H04M 2207/203 composed of PSTN and data network, e.g. the Internet
- H04M 2207/206 composed of PSTN and wireless network