User manual

October 2013 – Ed.1.0
EQUITEL E400 Family – Control and communications protocol
Page 11
2.1.1.1. DEMCALL message
This message is sent from a module E400 towards the controller to indicate that the user call button
has been pressed.
Address: E400  CC
Syntax: Command
:
DEMCALL
Parameters: None
When an E400 module sends this message, it waits to receive the corresponding ACK.
2.1.1.2. ACK_DEMCALL message
This is the answer to a DEMCALL message that the controller must sent back to E400.
Address: CC  E400
Syntax: Command
:
ACK_DEMCALL
Parameters: None
2.1.1.3. SIMCALL message
This message is sent from the controller to E400 to force launching a call query. That is, to simulate
that an user has pressed the call button.
This call will be established by using the EQUITEL proprietary protocol or SIP, depending on the
working mode in which the unit is configured.
Address: CC  E400
Syntax: Command
:
SIMCALL
Parameters: None
When a module E400 receives this message it answers back with ACK_SIMCALL.
2.1.1.4. ACK_SIMCALL message
This is the message that E400 has to send back to the controller as an answer to a SIMCALL message.
Address: E400  CC
Syntax: Command
:
ACK_SIMCALL
Parameters: None
2.1.1.5. STARTAUDIO message
This is the message that a controller sends to activate the audio transmission and reception in the
module E400.
Address: CC  E400
Syntax: Command
:
STARTAUDIO
Parameters: IP address
Port