Seagate Fibre Channel Interface - Manual (Page 381)

Fibre Channel Interface Manual, Rev. D 367
Code balance
The numerical sum of the 1 bits in any 10 bits in the transmitted bit stream divided by 10 (e.g., 1110100011 has
a code balance of 6/10 = 60%).
Code bit
The smallest time period used by FC-0 for transmission on the media.
Code violation
An error condition that occurs when a received transmission character cannot be decoded to a valid data byte
or special code using the validity checking rules specified by the transmission code.
Comma
The seven bit sequence 0011111 or 1100000 in an encoded stream.
Comma character
A special character containing a comma.
Command
A request describing a unit of work to be performed by a device server.
Command byte count
Upper limit on the extent of the data to be transferred by the SCSI command.
Command descriptor block (CDB)
A structure up to 16 bytes in length used to communicate a command from an application client to a device
server.
Concatenation
A logical operation that “joins together” strings of data. This operation is represented with the symbol “||”. Two
or more fields are concatenated to provide a reference of uniqueness (e.g., S_ID||X_ID).
Connection
See Dedicated Connection.
Connection initiator
The source N_Port which initiates a Class 1 connection with a destination N_Port through a connection
request and also receives a valid response from the destination N_Port to complete the connection establish-
ment.
Connection recipient
The destination N_Port which receives a Class 1 connect-request from the connection Initiator and accepts
establishment of the connection by transmitting a valid response.
Connection-oriented frames
Frames sent in either a Class 1 dedicated connection or a Class 4 circuit.
Connectionless buffers
Receive buffers participating in connectionless service and capable of receiving connectionless frames.