MTCMR-G-F4 Multi-Tech Systems, MTCMR-G-F4 Datasheet - Page 97

• Manufacturer Part Number: MTCMR-G-F4
• Description: MODEM GPRS QUAD BAND GSM GLOBAL
• Manufacturer: Multi-Tech Systems
• Series: MultiModem® iCellr

Specifications of MTCMR-G-F4

• Frequency: 850MHz, 900MHz, 1.8GHz, 1.9GHz
• Applications: General Purpose
• Interface: RS-232, USB
• Function: Transceiver, Modem
• Data Rate - Maximum: 115.2kbps
• Modulation Or Protocol: GSM, GPRS
• Voltage - Supply: 9 V ~ 32 V
• Package / Case: Module with Case
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Power - Output: -
• Sensitivity: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 881-1151; MTCMR-G-F4

Select Data Compression %C
V42bis Data Compression +DS
Syntax:
Multi-Tech Systems, Inc. GPRS AT Commands Reference Guide (Document Number S000293J)
Description:
Values:
Syntax:
Description:
Values:
This command enables or disables data compression negotiation if this feature is supported on the
product.
<n>
Command syntax: AT%C<n>
This command enables or disables V.42bis data compression if this feature is supported on the product.
Note that the product allows only the MNP2 protocol.
< dir >
< neg > Specifies whether or not the DCE should continue to operate if the desired result is not
< P1 >
< P2 > Specifies the maximum string length to be negotiated. Range is 6 to 250. Default is 20.
Command syntax: AT+DS=[[<dir>][,[<neg>][,[<P1>][,[<P2>]]]]
Command
AT+DS=?
Note: Test command
AT+DS=3,0,2048,250
Note: Set new parameters
AT+DS?
Note: Current values
Command
AT%C0
Note: Command
AT%C2
Note: Command
AT%C?
Note: Current value
0
2
no compression (default)
V42bis compression if supported
Specifies the desired direction(s) of operation of the data compression function; from the
0 Negotiated … no compression
1 Transmit only
2 Receive only
3 Both directions, accept any direction. Default.
obtained, (default is 0)
0 Do not disconnect if V.42 bis is not negotiated by the remote DCE as specified in <dir>.
1 Disconnect if V.42 bis is not negotiated by the remote DCE as specified in <dir>
Specifies the maximum number of dictionary entries that should be negotiated,
Range is 512 to 2048. Default is 2048.
Default.
DTE point of view, (default is 3)
Possible responses
OK
Note: Feature supported
OK
Note: V42bis supported
2
OK
Note: Command valid
Possible responses
+DS: (0-3),(0,1),(512-2048),(6-250)
OK
OK
Note: Command valid
+DS: 3,0,2048,20
OK
Note: Command valid
Chapter 11 – Data Commands
97