User guide

Chapter 8 – Communication Commands
Multi-Tech Systems, Inc. CDMA C1 AT Commands Reference Guide (PN S000478C) 30
V.42bis Data Compression Report +DR
Description: This command returns the results of data compression capability. If data reporting is enabled, this
command returns the data compression type of an incoming or outgoing data call. Otherwise, the
command returns NONE.
The intermediate result code represents current DCE-DCE data compression type. The syntax for
+DR reporting is: +DR<result>, and the result code is defined as follows:
+DR: NONE Data compression is not in use
+DR: V42B Rec. V.42bis is in use in both directions
+DR: V42B RD Rec. V.42bis is in use in receive direction only
+DR: V42B TD Rec. V.42bis is in use in transmit direction only
The +DR intermediate result code, if enabled, is issued before the final result code and after the
service report control +CR.
Syntax: Command syntax: AT+DR=<val>
Command Possible Responses
AT+DR=1
Note: Reporting enabled
OK
Note: Command valid
AT+DR?
Note: Display the current value
+DR: 1
OK
Note: Command valid
AT+DR=?
Note: Display the supported values
+DR: (0,1)
OK
Note: Command valid
Values: This syntax is for setting the +DR reporting method.
<val>
0 Disable reporting
1 Enable reporting
Hang-Up 1x Data Command +WCHD
Description: The AT+WCHD command is used by the application to disconnect all 1x data calls. The
alternative is to use the DTR pin.
Syntax: Command Syntax: AT+WCHD
Command Possible Responses
AT+WCHD
Note: Ask for disconnection
OK
NO CARRIER
Automatic Answer S0
Description: This S0 (zero) S-register parameter determines and controls the product automatic answering
mode. The setting is not persistent.
Syntax: Command syntax: ATS0=<value>
Command Possible Responses
ATS0=2
Note: Automatic answer after 2 rings
OK
ATS0?
Note: Current value
002
OK
Note: always 3 characters padded with zeros
ATS0=0
Note: No automatic answer
OK
Values:
<value> (0-255)
0 No automatic answer.
1-255 Answers after the specified number of rings