Comtrol AT Commands - Manual (Page 144)

AT Commands for CX81801/CX06833/CX81300/CX06827 Modems Reference Manual
Conexant 102184B
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S41 - General Bit Mapped Options Status
S41 indicates the status of command options.
Default: 13 (C3h) (00001101b)
Bits 0 -1 Compression selection (%Cn)
0 = Disabled (%C0)
1 = MNP 5 (%C1)
2 = V.42 bis (%C2)
3 = MNP 5 and V.42 bis (%C3) (Default.)
Bits 2, 6 Auto retrain and fallback/fall forward (%En)
Bit 6 Bit 2
0 0 = Retrain and fallback/fall forward disabled (%E0)
0 1 = Retrain enabled (%E1)
1 0 = Fallback/fall forward enabled (%E2) (Default.)
Bit 3 Reserved
Bits 4-5 Reserved
Bit 7 Reserved
S46 - Data Compression Control
S46 controls selection of compression. The following actions are executed for the given
values:
Range: 136 or 138
Default: 138
S46=136 Execute error correction protocol with no compression.
S46=138 Execute error correction protocol with compression. (Default.)
S48 - V.42 Negotiation Control
The V.42 negotiation process determines the capabilities of the remote modem.
However, when the capabilities of the remote modem are known and negotiation is
unnecessary, this process can be bypassed if so desired.
Range: 0, 7, or 128 If an invalid number is entered, it is accepted into the S-Parameter,
but S48 will act as if 128 has been entered.
Default: 7
S48=0 Disable negotiation; bypass the detection and negotiation phases; and
proceed with LAPM.
S48=7 Enable negotiation. (Default.)
S48=128 Disable negotiation; bypass the detection and negotiation phases; and
proceed at once with the fallback action specified in S36. Can be used to
force MNP.