Broadcast messages (ACDP)

This article describes the ACDP broadcast messages transmitted from the AlphaCom, and give some message examples.

Broadcast messages

Message	Message no, Hex	Description
ST_BUSY_BC	0x0036	Broadcast message: Intercom station is busy
ST_FREE_BC	0x0037	Broadcast message: Intercom station is free
CALL_STATUS_BC	0x0040	Broadcast message telling the status of a call
CONN_STATUS_BC	0x0041	Broadcast message telling that a connection is established
DISCON_STATUS_BC	0x0042	Broadcast message telling that a connection is disconnected
EXT_FEATURE_BC	0x0043	Broadcast message when a directory number (feature 50) is dialed on a station
Q_ELEM_ADDED	0x004B	Broadcast message. Reports that a mail message has been added to a station’s mail queue
Q_ELEM_REMOVED	0x004C	Broadcast message. Reports that a mail message has been removed from a station’s mail queue
CONF_IS_ROOT	0x007B	Broadcast message. Sender informs that it is root of conference
CONF_NOT_ROOT	0x007C	Broadcast message. Sender informs that it is no longer root of conference

Message example

The messages below are broadcast messages transmitted from the AlphaCom on the AlphaCom Data Protocol when a call is initiated by the command: $CALL L8002 L8009

014101FF2118410015003632018002=54

014101FF2119410016003632018009=5D

014101FF211A410017004007D706070B1A2D32018002320180090201=76

014101FF211B410018004107D706070B1A2D01043201800232018009=7F

Message explanation

Space is added for better readability.

Message 014101FF2118410015003632018002=54 

0141 01FF 21 18 41 0015 0036 32018002 = 54
---- ---- -- -- -- ---- ---- -------- - --
 !    !   !  !  !   !    !       !    ! !
 !    !   !  !  !   !    !       !    ! +- Checksum
 !    !   !  !  !   !    !       !    +--- Checksum next
 !    !   !  !  !   !    !       +-------- Station in NET_OBJ_REF format: dir no 8002, node 01
 !    !   !  !  !   !    +---------------- Message id: 0x0036 = Station is busy
 !    !   !  !  !   +--------------------- Reference: Value identifying receivers’ reference
 !    !   !  !  +------------------------- Message class: 65 (0x41) ‘A’ = AlphaCom
 !    !   !  +---------------------------- Options: The number of bytes is given by <hop­count­byte>
 !    !   +------------------------------- Hopcount byte
 !    +----------------------------------- Destination: Node 01, broadcast (0xFF)
 +---------------------------------------- Source: Node 01, module 65 (0x41)

Message 014101FF2119410016003632018009=5D  

0141 01FF 21 19 41 0016 0036 32018009 = 5D 
---- ---- -- -- -- ---- ---- -------- - --
 !    !   !  !  !   !    !       !    ! +- Checksum
 !    !   !  !  !   !    !       !    +--- Checksum next
 !    !   !  !  !   !    !       +-------- Station in NET_OBJ_REF format: dir no 8009, node 01
 !    !   !  !  !   !    +---------------- Message id: 0x0036 = Station is busy
 !    !   !  !  !   +--------------------- Reference: Value identifying receivers’ reference
 !    !   !  !  +------------------------- Message class: 65 (0x41) ‘A’ = AlphaCom
 !    !   !  +---------------------------- Options: The number of bytes is given by <hop­count­byte>
 !    !   +------------------------------- Hopcount byte
 !    +----------------------------------- Destination: Node 01, broadcast (0xFF)
 +---------------------------------------- Source: Node 01, module 65 (0x41)

0141 01FF 21 1A 41 0017 0040 07D706070B1A2D 32018002 32018009 02 01 = 76
---- ---- -- -- -- ---- ---- -------------- -------- -------- -- -- - --
 !    !   !  !  !   !    !         !           !        !      !  ! ! +- Checksum
 !    !   !  !  !   !    !         !           !        !      !  ! +--- Checksum next
 !    !   !  !  !   !    !         !           !        !      !  +----- Call mode: 01 = Open call
 !    !   !  !  !   !    !         !           !        !      +-------- A-station call priority: 02 = medium (normal)
 !    !   !  !  !   !    !         !           !        +--------------- B-station in NetObjRef format: dir no 8009, node 01  
 !    !   !  !  !   !    !         !           +------------------------ A-station in NetObjRef format: dir no 8002, node 01  
 !    !   !  !  !   !    !         +------------------------------------ Clock  
 !    !   !  !  !   !    +---------------------------------------------- Message id: 0x0040 = Call status
 !    !   !  !  !   +--------------------------------------------------- Reference: Value identifying receivers’ reference
 !    !   !  !  +------------------------------------------------------- Message class: 65 (0x41) ‘A’ = AlphaCom
 !    !   !  +---------------------------------------------------------- Options: The number of bytes is given by <hop­count­byte>
 !    !   +------------------------------------------------------------- Hopcount byte
 !    +----------------------------------------------------------------- Destination: Node 01, broadcast (0xFF)
 +---------------------------------------------------------------------- Source: Node 01, module 65 (0x41)