Envoy Configuration and Management Manual

WAN Subsystem Profiles and Modifiers for Envoy
Envoy Configuration and Management Manual—429861-001
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Modifier Descriptions
CRC16
Default: CRC16
Units: Not applicable
Range: Not applicable
Alternate modifier: LRC8, CCITTON
This modifier applies to BSC lines only. It causes CRC-16 block-check characters to be
generated.
CTLTERM1 or CTLTERM2
Default: Not specified
Units: Not applicable
Range: Not applicable
Alternate modifier: The other CTLTERM modifier
This modifier applies to SIMPLEX and ASC lines only. It determines how a read is
terminated.
If you specify CTLTERM1, Envoy terminates the read after receiving one character after
the end-of-text (EOT) character. In the following example of seven characters, STX,
BCC, and EOT represent one character each:
"STX", A, B, C, D, "EOT", "BCC"
Envoy terminates the read after receiving the BCC character, which is one character after
the EOT character.
If you specify CTLTERM2, Envoy terminates the read after receiving two characters
after the EOT character. In the following example of eight characters, STX, BCC1,
BCC2,and EOT represent one character each:
"STX", A, B, C, D, "EOT", "BCC1", "BCC2"
Envoy terminates the read after receiving the BCC2 character, which is the second
character after the EOT character.
The EOT character can be any ASCII character. Normally, the EOT character is the ETX
character. The default value used for the ETX modifier is %03.
None of the four termination compare characters should match the ETX character if the
ETX termination function is used.
Once a CTLTERM modifier is added to the device record, it can only be replaced by
another CTLTERM modifier; it cannot be removed by using the SCF ALTER DEVICE
command with the RESET modifier option.