Modem information B-11
V.42bis commands

Table 4: V.42bis commands

Command Function
+IFC = 0,0 Disable flow control
+IFC = 2,2 Enable RTS/CTS hardware flow control (data mode default)
+IFC = 1,1 Enable XON/OFF software flow control
+DS = 0,0,2048,32 Data compression disable
+DS =3,0,2048,32 V.42bis/MNP5 data compression enabled
+ES = 0,0,1 Normal mode (speed buffering) only
+ES = 4,4,6 MNP mode only
+ES =3,3,5 V.42/MNP/Normal auto-mode
+ES = 3,0,2 V.42 mode only
+ILRR = 0 Disable protocol result code appended to DCE speed
+ILRR = 1 Enable protocol result code appended to DCE speed