Black Box Programmable Security Guard Manual page 28

PROGRAMMABLE SECURITY GUARD
Table 4-2. Output Leads with Modem Controls Enabled (On: Active; Off: Inactive)
LEAD
RTS
DTR
26
SECURITY MODE
PASSWORD
VALIDATION
Always ON
OFF if DCD is not on
in 1 minute (call aborted)
OFF when DCD goes
from on to off
(call terminated)
OFF on Reset
ON when RI is up
(answer incoming call)
For incoming call,
RI must activate twice
for DTR to be raised
to the modem. Modem
then answers the call after
set number of rings.
SECURITY MODE
CALLBACK
PROCEDURE
Always ON
ON while transmitting
dialing string and during
1-minute wait for DCD
Stays ON if DCD comes up
(call is answered by a modem)
Goes OFF if DCD is not up
in 1 minute (no modem
answered, abort callback
OFF if optioned secondary
password is not entered
correctly (disconnect call)
OFF for 3 seconds
(disconnect call;
give remote user and
modem time to
prepare for callback)
Stay OFF if RI comes up
(don't answer incoming
calls during callback)
PASS-THRU
MODE
Always ON
ON during entry to
Pass-Thru Mode
OFF during exit from
from Pass-Thru
Mode
OFF when DCD goes off
OFF when Exit command
is received
OFF if no activity timeout