A duplex modem operating at data signalling rates of up to 14 400 bit/s for use on the general switched telephone network and on leased point-to-point 2-wire telephone-type circuits
一种双工调制解调器 以高达14 400比特/秒的数据信令速率运行 用于一般交换电话网络和租用的点对点双线电话电路

1991-02-22

A modem operating at data signalling rates of up to 33 600 bit/s for use on the general switched telephone network and on leased point-to-point 2-wire telephone-type circuits
一种调制解调器 以高达33600比特/秒的数据信令速率运行 用于一般交换电话网络和租用的点对点双线电话电路

1998-02-06

A simultaneous voice plus data modem, operating at a voice plus data signalling rate of 4800 bit/s, with optional automatic switching to data-only signalling rates of up to 14 400 bit/s, for use on the General Switched Telephone Network and on leased point-to-point 2-wire telephone type circuits
一种同步语音加数据调制解调器 以4800位/秒的语音加数据信令速率运行 可选自动切换至高达14 400位/秒的纯数据信令速率 用于一般交换电话网络和租用的点对点双线电话型电路

1996-08-16