
October 2013 – Ed.1.0
EQUITEL E400 Family – Control and communications protocol
Page 21
2.1.4.5. INCALLRINGING message
This is the message sent from a module E400 to indicate that it has received an incoming call query via
the SIP protocol.
Address: E400 CC
Syntax: Command
INCALLRINGING
Parameters: None
After sending this message, E400 waits to receive the corresponding ACK_INCALLRINGING.
2.1.4.6. ACK_ INCALLRINGING message
This is the message that the central must send back to a module E400 when receiving the message
INCALLRINGING.
Address: CC E400
Syntax: Command
ACK_INCALLRINGING
Parameters: None
2.1.4.7. CONNECTEDCALL message
This is the message sent from a module E400 to indicate the beginning of a conversation and the audio
activation.
Address: E400 CC
Syntax: Command:
CONNECTEDCALL
Parameters: None
After sending this message, E400 waits to receive the corresponding ACK_CONNECTEDCALL.
2.1.4.8. ACK_ CONNECTEDCALL message
This is the message that the control center has to send back to an E400 as the answer to a message
CONNECTEDCALL.
Address: CC E400
Syntax: Command
ACK_CONNECTEDCALL
Parameters: None
2.1.4.9. DISCONNECTEDCALL message
This is the message sent from any of the E400 modules to indicate the end of a conversation, using the
SIP protocol, and the audio deactivation.
Address: E400 CC
Syntax: Command
DISCONNECTEDCALL
Parameters: None
After sending this message, E400 waits to receive the corresponding ACK_DISCONNECTEDCALL.
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