<pending_RD> Decimal number 0 specifying that disconnect will occur
immediately and all buffered receive data will be discarded when
the local DTE requests call disconnection.
<timer> Decimal number 0 specifying that the modem will not attempt to
deliver the buffered data before abandoning the attempt and
discarding remaining data.
Reporting Current or Selected Values
Command: +ETBM?
Response: +ETBM: <pending_TD>,<pending_RD>,<timer>
Example: +ETBM: 0,0,0
Reporting Supported Range of Parameter Values
Command: +ETBM=?
Response: +ETBM: (<pending_TD> range),(<pending_RD> range), (<timer> range)
Example: +ETBM: (0),(0),(0)
3.2.6 Data Compression Commands
This section contains parameters to condition modem use of standard ITU-T V.42
bis
Data
Compression Procedures.
+DS - Data Compression
This extended-format compound parameter controls the V.42bis data compression function if
provided in the modem. It accepts four numeric subparameters:
Syntax
+DS=[<direction>[,<compr_neg>[,<max_dict>[,<max_string>]]]]
Defined Values
<direction> Specifies the desired direction(s) of operation of the data
compression function; from the DTE point of view.
0 Negotiated; no compression (V.42bis P0=0).
3 both directions, accept any direction (V.42bis P0=11). (Default.)
<compr_neg> Specifies whether or not the modem should continue to operate if
the desired result is not obtained.
0 Do not disconnect if V.42bis is not negotiated by the
remote modem as specified in <direction>.
<max_dict> Specifies the maximum number of dictionary entries (2048 entries)
which should be negotiated (may be used by the DTE to limit the
codeword size transmitted, based on its knowledge of the nature of
the data to be transmitted).
<max_string> Specifies the maximum string length (32 bytes) to be negotiated (V.42bis P2).
Reporting Current or Selected Values
Command: +DS?
Response: +DS: <direction>,<compr_neg>,<max_dict>,<max_string>
Example: +DS: 3,0,2048,32 for the defaults and 2048 entry max dictionary.
Reporting Supported Range of Parameter Values
Command: +DS=?
Response: +DS: (<direction> range),(< compr_neg > range),(<max_dict> range),(<max_string> range)
Example: +DS: (0,3),(0),(2048),(32)
+DS44 - V.44 Compression Select
This extended-format compound parameter controls the V.44 data compression function.
Syntax
+DS44=[<direction>[,< compress_negotiation >[,<capability>[,<max_codewords_tx>
[,<max_codewords_rx>[,<max_string_tx>[,<max_string_rx>[,<max_history_tx>
[,<max_history_rx>]]]]]]]]]
Defined Values
