Avocent ESP Serial Hub Installer/User Manual page 33

Table 3.5: Modem Emulation Connection Method Configurable Items (Continued)
Item Description
Specifies whether text or numeric codes will be sent to the serial device in response to
modem AT commands and how unknown commands will be handled. Valid values are:
ATV0 - text codes will be used; unknown commands will cause an error
ATV1 - numeric codes will be used; unknown commands will cause an error
ATV2 - numeric codes will be used; unknown commands will be discarded
Verbose
ATV3 - text codes will be used; unknown commands will be discarded
Response
The default value is ATV0.
Table 3.7 on page 26 lists the numeric and text codes.
This option is equivalent to issuing an ATV modem command. If an ATV command is issued
with a different value, the new value will will be used during that connection but it will not
replace this configured value. The configured Verbose Response value will be used for
subsequent connections.
Specifies whether response codes will be displayed on the serial device. Valid values are:
ATQ0 - response codes will be displayed (enabled)
ATQ1 - response codes will not be displayed (disabled)
Response
The default value is ATQ0 (enabled).
Codes
This option is equivalent to issuing an ATQ modem command. If an ATQ command is issued
with a different value, the new value will be used during that connection but it will not replace
this configured value. The configured Response Codes value will be used for
subsequent connections.
Enables or disables monitoring of the DCD signal. When enabled, if the inbound DCD signal
is logically low, the ESP hub will not allow the TCP session to be created. If the inbound DCD
signal changes from logically high to low while a session is active, the connection will
Monitor DCD
be closed.
The default value is disabled.
Specifies the length of time accumulated serial data should be buffered before being sent to
the remote server. Valid values are 0-65535 hundredths of a second. A 0 value indicates that
data will be sent as soon as it is available.
Serial
For example, a value of 100 indicates that once serial data is received, it will remain buffered
buffering
up to 1 second (100 hundredths of a second), at which time all data will be sent.
If the buffer becomes half full, the time is ignored and the data is sent.
The default value is 0 (send immediately).
Specifies the length of time before the TCP session is disconnected if there is no activity.
Valid values are 0-65535 seconds. A 0 value disables the inactivity time-out.
Inactivity time-
For example, a value of 60 indicates the session will be disconnected if there is no activity for
out
a period of 60 seconds.
The default value is 0 (disabled).
Chapter 3: Connection Methods, Attributes and Configurable Features 23