Command/response, End character, B.2.6 command/response – Comtech EF Data C5 User Manual
Page 288: B.2.7 end character
Remote Control Operation
C5/K1/K3 Integrated Satellite Terminal System
B–4
Rev. 0
B.2.6 Command/Response
The command/response portion of the message contains a variable-length character
sequence, which conveys command and response data.
If a satellite modem receives a message addressed to it, which does not match the
established protocol or cannot be implemented, a negative acknowledgment message is sent
in response. This message is:
! >add/?ER1_parity error'cr''lf']
(Error message for received parity errors.)
! >add/?ER2_invalid parameter'cr''lf']
(Error message for a recognized command, which cannot be implemented or has parameters,
which are out of range.)
! >add/?ER3_unrecognizable command'cr''lf']
(Error message for unrecognizable command or bad command syntax.)
! >add/?ER4_modem in local mode'cr''lf']
(Modem in local error; send the REM command to go to remote mode.)
! >add/?ER5_hard coded parameter'cr''lf']
(Error message indicating that the parameter is hardware dependent and may not be changed
remotely.)
Note: “add” is used to indicate a valid 1 to 3 character device address in the
range between 1 and 255.
B.2.7 End
Character
Each message is ended with a single character, which signals the end of the message:
!
“cr”
Carriage return character for commands
!
“]”
End bracket for responses