请将电话机清理一下，包括拨号盘。
在电话机上刷卡，然后拨号。
DT MF信号是音频电话中的拨号信号，广泛应用于新一代电话机。
DTMF signal used as dialing signal in tone telephone applied in many new field widely.
DT MF信号是音频电话中的拨号信号，广泛应用于新一代电话机。
DTMF signal used as dialing signal in tone telephone applied in many new field widely.
应用推荐