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