US Robotics 56K USB Modem User Manual page 48

Table 81. +ER Error Control Reporting Intermediate Result Codes
Command
+ER: NONE Data compression not in use.
+ER: LAPM V.42 LAPM protocol is in use.
+ER: ALT V.42 alternative protocol is in use.
Table 82. +ER Extended Syntax Commands
Command
+ER=<value>
+ER?
+ER=?
+ES=<orig_rqst>,<orig_fbk>,<ans_fbk>—Error Control Selection
Use this command to select the error correction mode. If the modem is operated in V.80 mode
(synchronous buffered mode), and +ES=,,8, the +ES? always returns +ES: 6,,8. The setting of this
command overwrites the \N command. However, the +ES command is overwritten by the setting on a \N
command.
Result codes:
• OK if one of the combinations is shown in Table 81.
• ERROR all other parameter combinations.
Controller-based modems support the following parameter combinations.
Table 83. +ES Combinations
Combination
+ES=1,0,1 Buffered mode.
+ES=0,1,0 Direct mode.
+ES=4,4,6 MNP or disconnect mode.
+ES=3,3,5 LAPM or disconnect mode.
+ES=4,0,6 MNP or buffered mode.
+ES=3,0,2 LAPM, MNP, or buffered mode (default).
+ES=2,0,2 LAPM or buffered mode.
+ES=3,2,4 LAPM, MNP, or disconnect mode.
+ES=,,8 V.42 sync buffer mode (V.80 enabled).
+ES=6,,8 V.42 sync buffer mode (V.80 enabled).
Table 84. +ES Extended Syntax Commands
Command
+ES=<value>
+ES?
+ES=?
Function
Enables or disables error control reporting.
Displays the current setting for error control reporting.
Displays the supported error control reporting settings (0, 1).
Mode
Selects the modem error control method.
Displays the current error control settings.
Displays the supported error control settings.
56K USB Modem
Description
Description
Command Reference - 42
User Guide