TECHNICAL R EFERENCE8-12Extended Data Commands&$ Displays a list of ampersand (&)commands.&An Enables/disables additional resultcode subsets (see Xn).&A0 ARQ result codes disabled&A1 ARQ result codes enabled&A2 V.32 modulation indicatoradded&A3 Protocol indicators addedLAPM/MNP/NONE (errorcontrol) and V42bis/MNP5(data compression)&Bn Manages modem’s serial port rate.&B0 Variable, follows connectionrate&B1 Fixed serial port rate&B2 Fixed in ARQ mode, variablein non-ARQ mode&Cn Controls Carrier Detect (CD)signal.&C0 CD override&C1 Normal CD operations&Dn Controls Data Terminal Ready(DTR) operations.&D0 DTR override&D1 DTR toggle causes onlineCommand mode&D2 Normal DTR operations&D3 Resets on receipt of DTR&Fn Loads a read-only (non-programmable) factoryconfiguration.&F0 Generic template&F1 Hardware flow controltemplate&F2 Software flow controltemplate