Rainbow Electronics FARGO MAESTRO 100 (with TCP_IP) - Manual (Page 252)

Call Control Commands
Cellular Result Codes +CRC
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WM_DEV_OAT_UGD_049 - 001 VOLUME 2 August 23, 2007
12.15 Cellular Result Codes +CRC
12.15.1 Description
This command allows more detailed ring information for an incoming call (voice or
data). Instead of the string "RING", an extended string is used to indicate which type
of call is ringing.
12.15.2 Syntax
Action command
AT+CRC=<mode>
OK
Read command
AT+CRC?
+CRC: <mode>
OK
Test command
AT+CRC=?
+CRC: (list of supported <mode>s)
OK
Unsolicited response
+CRING: <type>[,<PDP_type>[,<PDP_addr>]]