Comtech EF Data CMR-5950 Manual - Manual (Page 54)

CMR-5950 Digicast Media Router Inline Scrambler (IS) Revision A
BISS E Control via SimulCrypt Interface MN/INLNSCRDC.IOM
Where:
protocol_version: A 8-bit field identifying the protocol version. It shall have the value
0x02.
message_type: A 16- bit field identifying the type of the message. The list of message
type values is defined below. Unknown message types shall be ignored by the receiving
entity.
message_length: 16-bit field specifies the number of bytes in the message immediately
following the message_length field.
parameter_type: 16-bit field specifies the type of the following parameter. The list of
parameter type values is defined in the interface specific clauses of the present document.
Unknown parameters shall be ignored by the receiving entity. The data associated with
that parameter will be discarded and the remaining message processed.
parameter_length: 16-bit field specifies the number of bytes of the following
parameter_value field.
parameter_value: Variable-length field specifies the actual value of the parameter. Its
semantics are specific to the parameter type value.
NOTES:
1) For parameters with a size two or more bytes, the first byte to be transmitted will be
the most significant byte.
2) Parameters do not need to be ordered within the generic message.
The following table defines valid message type values accepted by the BISS scrambler:
Message type value Message type
0xC000 Connect
0xC001 Disconnect
0xC002 Set BISS mode
0xC003 Set key
0xC004 Select active key
0xC005 Keep alive
0xC006 Ack
0xC00F Error
The following table defines allowable parameter type values used in the messages:
Parameter type value Parameter type Type/units
0xC000 service_index uimsbf
0xC001 BISS_mode uimsbf
0xC002 key_select uimsbf
0xC003 sw uimsbf
0xC004 esw uimsbf
0xC005 injected_ID uimsbf
0xC006 buried_ID
B–2