Modem 常用AT指令集(3) F2 Reserved. (RC144) F3 Select V.23 line modulation. (RC144) F4 Select V.22 or Bell 212A 1200 bps line speed. (RC144) F5 Select V.22 bis line modulation. (RC144) F6 Select V.32 bis or V.32 4800 line modulation. (RC144) F7 Select V.32 bis 7200 line modulation. (RC144) F8 Select V.32 bis or V.32 9600 line modulation. (RC144) F9 Select V.32 bis 12000 line modulation. (RC144) F10 Select V.32 bis 14400 line modulation. (RC144) Hn - Disconnect (Hang-Up) 摘机挂机 H0 Initiate a hang-up sequence.挂机 H1 If on-hook,go off-hook and enter command mode.摘机进入命令模式 In – Identification 鉴定 I0 Report prodUCt code.汇报产品代码