Moxa Technologies G2150I manual Select Data Compression %C, V42 bis Data Compression +DS, At+Ds=?

OnCell G2150I AT Command Set Data Commands

Select Data Compression: %C

Description: This command enables or disables data compression negotiation if this feature is supported by the product.

Command syntax:	AT%C<n>
Command		Possible responses
AT%C0		OK
Note: Command		Note: Feature supported
AT%C2		OK
Note: Command		Note: V42bis supported
AT%C?		2
Note: Current value		OK
		Note: Command valid

Defined values: <n>

0:no compression (default value)

2:V42bis compression if supported

V42 bis Data Compression: +DS

Description: This command enables or disables V.42bis data compression if this feature is supported by the product. Beware that the product only allows the MNP2 protocol.

Command syntax: AT+DS=[[<dir>][,[<neg>][,[<P1>][,[<P2>]]]]

Command	Possible responses
AT+DS=?	+DS: (0-3),(0,1),(512-2048),(6-250) OK
Note: Test command
AT+DS=3,0, 2048,250	OK
Note: Set new parameters	Note: Command valid
AT+DS?	+DS: 3,0,2048,250
Note: Current values	OK
	Note: Command valid

Defined values:

<dir >: specifies the desired direction(s) of operation of the data compression function; from the DTE point of view

0Negotiated … no compression

1Transmit only

2Receive only

3Both directions, accept any direction (default value)

<neg >: specifies whether or not the DCE should continue to operate if the desired result is not obtained

0Do not disconnect if V.42 bis is not negotiated by the remote DCE as specified in <dir> (default value)

1Disconnect if V.42 bis is not negotiated by the remote DCE as specified in <dir>

<P1 >: specifies the maximum number of dictionary entries that should be negotiated (default is 2048)

Range 512 to 2048

<P2 >: specifies the maximum string length to be negotiated (default is 20).

Range 6 to 250

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