S41 - general bit mapped options status, S46 - data compression control, S48 - v.42 negotiation control – Longshine LCS-8156C1 User Manual

Page 133

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AT Commands for CX930xx Modem Reference Manual

102752B

Conexant

3-109

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.

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