Multitech BL-Series Manual de usuario descargar pdf (Pagina 22)

AT Commands for the MT5656ZDX, MT5600ZDX, MT5600BA/BL-Series Modems

Multi-Tech Systems, Inc. Commands Reference Guide (PN S000273D)

Other V.92 Commands

These are V.92 commands even though they are not formally a part of the V.92 protocol set of commands.

Command: +A8I CI Signal Indication

Values: 0

Default: None

Description: This indication is issued by an answering modem to indicate detection of a V.8 CI signal

and report the recovered Call Function octet(s).

Command: +DR Data Compression Reporting

Defined Values: 0, 1

0 Data compression reporting disabled (no +DR result code transmitted).

1 Data compression reporting enabled (+DR result code transmitted). (Default.)

Description: This extended-format numeric parameter controls whether or not the extended-format +DR:

intermediate result code is transmitted from the modem to the DTE. S95 bit 5 is reset to 0

for +DR=0 and is set to a 1 for +DR=1. The more recent setting of +DR or S95 bit 5, and the

W command setting, determines the actual data compression result code reporting (see

S95 Parameter and W Command).

Reporting Current or Selected Values:

Command: +DR?

Response: +DR: <current value>

Example: +DR: 1 For the default setting.

Reporting Supported Range of Parameter Values:

Command: +DR=?

Response: +DR: (<value> range)

Example: +DR: (0,1)

+DR: <type> Intermediate Result Code:

+DR: <type> reported represents the current (negotiated or renegotiated) modem-modem

data compression type. If enabled, the intermediate result code is transmitted at the point

after error control negotiation (handshaking) at which the modem has determined which

data compression technique will be used (if any) and the direction of operation. The +DR

intermediate result code, if enabled, is issued after the Error Control Report (+ER) and

before the final result code (e.g., CONNECT).

Command: +DS Data Compression

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).

<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) that

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 max string length (32 bytes) to be negotiated (V.42bis P2).

Default: 3

Description: This extended-format compound parameter controls the V.42bis data compression function

if provided in the modem. It accepts four numeric subparameters:

+DS=[<direction>[,<compr_neg>[,<max_dict>[,<max_string>]]]]

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)

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