MT5600BA-V92-NAM Multi-Tech Systems, MT5600BA-V92-NAM Datasheet - Page 20

• Manufacturer Part Number: MT5600BA-V92-NAM
• Description: MODEM V.92 WORLD DATA/FAX LEASE
• Manufacturer: Multi-Tech Systems
• Series: MultiModem® IIr

Specifications of MT5600BA-V92-NAM

• Data Format: V.92
• Interface: RS-232
• Voltage - Supply: 9 V ~ 12 V
• Mounting Type: Desktop
• Package / Case: 9.0" L x 6.2" W x 1.4" H (229mm x 158mm x 36mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 881-1018

Data Compression Commands
Command:
Values:
Default:
Description:
Report
Command:
Values:
Default:
Description:
Report Commands:
Command: +DS44 V.44 Compression Select
Description:
Values:
Multi-Tech Systems, Inc. AT Commands Reference Guide (S000273F)
Commands:
+DR Data Compression Reporting
+DS Data Compression
0, 1
1
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).
+DR0
+DR1
+DR:
+DR?
+DR=? Reports supported range of parameter values.
<direction>
<compr_neg> Specifies whether or not the modem should continue to operate if the
<max_dict>
<max_string> Specifies max string length (32 bytes) to be negotiated (V.42bis P2).
3
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>]]]]
+DS?
+DS=?
This extended-format compound parameter controls V.44 data compression function.
<direction> The decimal number that specifies the desired direction(s) of operation of
<compress_negotiation> The decimal number that specifies whether or not the modem
<capability> The decimal number that specifies the use of stream method, packet
Data compression reporting disabled (no +DR result code transmitted).
Data compression reporting enabled (+DR result code transmitted). (Default.)
<type> Intermediate Result Code. The +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).
Reports current or selected values.
the data compression function; from the DTE point of view.
0
1
2
3
should continue to operate if the desired result is not obtained.
0
1
method, multi-packet method.
0
1
2
Specifies the desired direction(s) of operation of the data compression
function; from the DTE point of view.
+DS0
+DS3
desired result is not obtained.
+DS0
Specifies maximum number of dictionary entries (2048 entries) that should
be negotiated (may be used by the DTE to limit the code word size
transmitted, based on its knowledge of the data to be transmitted).
Reports current or selected values.
Reports supported range of parameter values.
Negotiated, no compression.
Transmit only.
Receive only.
Both directions, accept any direction. Default
Do not disconnect if V.44 is not negotiated by the remote DCE as
specified in <direction>. Default
Disconnect if V.44 is not negotiated by remote DCE as specified in
<direction>.
Stream method. Default
Packet method.
Multi-packet method.
Negotiated; no compression (V.42bis P0=0).
Both directions, accept any direction (V.42bis P0=11).
Do not disconnect if V.42bis is not negotiated by the remote
modem as specified in <direction>.
Chapter 2 – AT Commands
20