User`s guide

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DTR Control
This drop-down selection box controls how the router responds to the DTR signal. The
available options are; None, Drop call, Drop line and call, Drop call on transition or Drop line
& call on transition.
Selecting “None” configures the router to ignore the DTR signal (this is equivalent to
“AT&D0”).
Selecting “Drop call” configures the router to disconnect the current call and return to AT
command mode when the DTR signal from the attached terminal (DTE) is de-asserted (this
is equivalent to “AT&D1”).
Selecting “Drop line and call” configures the router to disconnect the current call, drop the
line and return to AT command mode when the DTR signal is de-asserted (this is equivalent
to “AT&D2”).
DTR de-bounce time s x 20 milliseconds
This parameter determines the length of time (in multiples of 20ms) for which the DTR
signal must be de-asserted before the router acts on any options that are set to trigger on
loss of this signal. Enter the desired multiple into the text box. Increasing this value makes
the router less sensitive to “bouncing” of the DTR signal. Conversely, decreasing this value
makes the router more sensitive. The default of 100ms (5 times 20ms) is a reasonable
value.
Escape Character
This parameter determines the character used in the escape sequence. The default is the
“+” symbol (ASCII value 43, 0x2b). Changing this value has the same effect as changing
the “S2” register.
Escape Delay s x 20 milliseconds
This parameter defines the required minimum length of the pause (in multiples of 20ms) in
the escape sequence. The default is 50 x 20ms which means that the escape sequence
becomes “+++”, a pause of 1 second and then “AT” in order to drop back to AT command
mode. Enter the desired delay into the text box if a delay of some other value is required.
Forwarding Timeout s x 10 milliseconds
This parameter defines the length of time that the router will wait for more data after
receiving at least one octet of data through the serial port and transmitting it onwards. This
timer is reset each time more data is received. The router will forward data onwards when
either the forwarding timer expires or the input buffer becomes full. This parameter applies
to ADAPT, TCPDIAL, TCPPERM and PANS.
Break Transmit Escape Character c
This parameter determines the character used in the escape sequence. The “-” symbol
(ASCII value 45, 0x2d) is a recommended value. Changing this value has the same effect as
changing the “S3” register. To use the break sequence, type “-” 3 times, with a 1 second
pause either side of the 3 “-” characters.
When the Async port detects the following sequence....
<guard time 1 sec>---<guard time 1 sec>
instead of outputting the three minus characters (they are removed from the output
stream) a BREAK condition is placed on the Async transmitter for 1 second.