Results for “telephony”

Waehlscheibe-kurzwahlnummern

Waehlscheibe-kurzwahlnummern

Gestumblindi · 930×723

Fig 53 Experimental telephone earpiece

Fig 53 Experimental telephone earpiece

Armand Kohl (1845-1897) and Gilbert(?) · 4800×6135

Fig 25 Gentleman with two telephones 1880

Fig 25 Gentleman with two telephones 1880

Benoît Bonnafoux · 6064×6128

Ordinary Bell telephone (1880)

Ordinary Bell telephone (1880)

Benoît Bonnafoux · 2608×3200

Telephony echo canceler with hybrid transformer and switch

Telephony echo canceler with hybrid transformer and switch

Constant314 · 8763×3000