Black Box 32144 Manual page 117

4.7.1 D
IALING A
DTR dialing allows you to set up
the modem to automatically dial a
stored number even when the
autodialer has not been enabled.
To enable DTR dialing, select
DTR from the DIALER option
screen.
When DTR dialing is enabled, an
OFF-to-ON transition of DTR will
cause the modem to automatically
dial the number previously stored
using the front panel LCD. DTR
must remain on for at least 50 ms
to effect automatic dialing. A 50-ms
drop of DTR will abort the process
or disconnect the call. When DTR
goes high again for at least 50 ms,
the automatic dialing process will
begin again.
4.7.2 A M
NSWER
If the modem is set for DTR
dialing, it will automatically answer
without DTR. However, it will not
be able to transfer data until DTR
goes high. The call may be
terminated by dropping DTR.
4.8 Dial Line Auto-Recovery
The Dial Line Auto-Recovery
feature allows you to setup the
modem for a dial-up application so
it will automatically redial to
restore a broken connection if the
modem goes on-hook. In this way,
the Dial Line Auto-Recovery
feature emulates the reliability of a
leased line connection.
CHAPTER 4: General Operation and Special Features
S N
TORED UMBER
O
ODE PERATION
4.8.1 S
ETTING UP THE
D L A -R
IAL INE UTO
Two steps are required to set up the
modem for Dial Line Auto-
Recovery: You must first enter or
store the number to be dialed
together with the /R command;
then you must enable Dial Line
Auto-Recovery.
Entering the /R Command
To configure the modem for Dial
Line Auto-Recovery from the front
panel, enter the phone number to
be dialed followed by /R (the Dial
Line Auto-Recovery command) on
the PHONE screen:
T555-4545/R
DEC CTRL
If you need assistance, see
Section 4.2, Storing Phone
Numbers.
An alternate way to configure the
modem for Dial Line Auto-
Recovery (in Hayes mode only) is
to use the Hayes AT &Z command
to store the phone number to be
redialed and the /R command in
memory location 0, by entering
AT &Z0=T555=4545/R
M
ODEM FOR
ECOVERY
INC
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