Which caller ID standards are supported by DOCSIS modems, especially Cisco and Motorola? I'm interested in regional differences. Especially concerning Germany.
There are at least
    Bellcore (North America, China)
    DTMF (Finnland, Sweden)
    DTMF (Denmark)
    ETSI DTMF
    ETSI DTMF with PR
    ETSI DTMF After Ring
    ETSI FK
    ETSI FSK with PR (UK)
and
    v.23
    bell202
 modulation.