Lenovo ThinkCentre A57 User Manual page 60

Attention Switzerland User:
If your Swisscom phone line does not have Taxsignal switched OFF, modem
function may be impaired. The impairment may be resolved by a filter with the
following specifications:
Telekom PTT SCR-BE
Taximpulssperrfilter-12kHz
PTT Art. 444.112.7
Bakom 93.0291.Z.N
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