Specifications

Chapter 7 – Call-Related Commands
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371B) 90
7.24 AT+CRC Set Cellular Result Codes for
Incoming Call Indication
Description: The AT+CRC command controls whether or not to use the extended format of incoming
call indication.
<mode>=1 may lead to a connection failure if the application (e.g., WinFax) waits for the
default URC.
Test Command Syntax: AT+CRC=?
Response: +CRC: (list of supported<mode>s)
OK
ERROR
Read Command Syntax: AT+CRC?
Response: +CRC: <mode>
OK
ERROR
Write Command Syntax: AT+CRC=[<mode>]
Response: OK
ERROR
Parameter Descriptions:
<mode>
0 Disable extended format. Default.
1 Enable extended format
<type>
“REL ASYNC“ Asynchronous non-transparent
“FAX“ Facsimile
“VOICE“ Voice
“GPRS“ <PDP_type>, <PDP_addr> [,[<L2P>][,<APN>]] GPRS network request for PDP context activation
Unsolicited Result Codes:
URC 1
RING
Indicates incoming call to the TE if <mode>=0.
URC 2
+CRING: <type>
Indicates incoming call to the TE if <mode>=1.
7.25 AT+CSNS Single Numbering Scheme
Description: The AT+CSNS command enables the ME to accept incoming calls when no bearer
capability information is provided with the call; e.g., single numbering scheme calls or calls
originitating from analog devices.
Test Command Syntax: AT+CSNS=?
Response: +CSNS: (list of supported<mode>s)
OK
Read Command Syntax: AT+CSNS?
Response: +CSNS: <mode>
OK
Write Command Syntax: AT+CSNS=[<mode>]
Response: OK
ERROR
+CME ERROR
Parameter Description:
<mode>(num)
0 Voice: Each call received without bearer element is assumed to be speech. Default.
2 Fax: Each call received without bearer element is assumed to be an incoming fax.
4 Data: Each call received without bearer element is assumed to be a data call.
Please take into account that the bearer service parameters set with AT+CBST apply to all data
calls including those received without bearer capability.
Notes:
• The command must be set before the call comes. By default, when you do not modify the settings, all calls
received without bearer element are assumed to be voice.
• The setting will be automatically saved when you power down the GSM engine with AT^SMSO, provided that
PIN authentication has been done. This value will be restored when PIN authentication is done again.