Rainbow Electronics FARGO MAESTRO 100 (with TCP_IP) - Manual (Page 515)

Supplementary Services Commands
Call Related Supplementary Services +CHLD
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WM_DEV_OAT_UGD_049 - 001 VOLUME 3 August 23, 2007
20.2.5 Examples
Command Responses
AT+CHLD=? +CHLD: (0-4,11-17,21-27)
OK
ATD0123456789; OK
+WIND: 5,1
AT+CLCC +CLCC: 1,0,0,0,0,"0123456789",129
OK
+WIND: 5,2
Note: incoming call in waiting state
AT+CLCC
Note: Com id 1 is active, com id 2 is in
waiting state
+CLCC: 1,0,0,0,0,"0123456789",129
+CLCC: 2,1,5,0,0
OK
AT+CHLD=2 OK
AT+CLCC +CLCC: 1,0,1,0,0,"0123456789",129
+CLCC: 2,1,0,0,0
OK
Note: Com id 1 is held, com id 2 is active