YD/T 945-1998
公用电话交换网和点对点二线专线电路上使用的数据信号速率高达 33600 bit/s 的调制解调器
Modem operating at data signalling rates of up to 33600 bit/s for use on the general switched telephone network and on leased point - to - point 2 - wire telephone - type circuits
YDT945-1998, YD945-1998