Register Descriptions
F-82 AT Commands
:T18=
n Busy Out When DTR is Low Timer
Range:
Where n is an integer from 0 to 255 seconds
Default:
0
When DTR is low, the modem goes off hook and busies out the line after the time set
by :T18 expires. When DTR is raised, the modem re-enters command state. &Dn
(where n=1, 2, or 3) must also be set.
Setting :T18=0 disables this feature.
NOTE
Manual Dial (:Dn) cannot be used when :T18 is in effect. :D0 must be set when
:T18 is set to a non-zero value.
:T19=
n Bit Mapped Register
Range:
Where n is an integer from 0 to 255 (see below for the valid values for n)
Default:
1
This command controls MNP link control and is used as follows:
:T22 DSR Timer
Range:
Where n is an integer from 0 to 255 (in increments of 12.5 milliseconds)
Default:
34 (425 milliseconds)
After DCD and/or CTS drop, :T22 identifies how long the modem waits before DSR
is dropped when disconnecting. For example, if \D2 and &C1 are set, when DCD and
CTS drop, the modem then waits the amount of time specified by :T22 before dropping
DSR.
Bit Position
Function
Description
0
0
Modem keeps a non-MNP10 1200 bps
connection if no MNP link activity is
received from the remote modem.
1
Modem disconnects a non-MNP10 1200 bps
connection if no MNP link activity received
from remote modem for two minutes.
