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PROGRAMMING PROCEDURES-INSTRUCTIONS/SYSTEM RECORDS
SECTION 100-816-302
MARCH 1993
return dial tone after seizure, light this LED
to insert a pause before and after the PBX or
CENTREX access code is dialed by the
DIU; LED 05 should also be lit to automati-
cally insert a pause before network tele-
phone numbers are autodialed by DIUs.
NOTE:
The pause length is set in Program 12-3, and
COlines behind PBXYCENTREXare assigned
in Programs 42-O and 42-1 - 8.
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DTR Pulse, LED 06-If a PDIU-DS is con-
nected to a modem, turn LED 06 ON to
cause the modem to disconnect the line
when a digital telephone user presses the
Data Release button. When the button is
pressed, the PDIU-DS sends a DTR pulse to
the modem, which disconnects the line when
it receives the pulse. The PDIU-DS will
pulse DTR on outgoing modem calls only-
not on incoming modem calls. Initially, the
modem should be sent AT command “AT &
D2” so it can recognize DTR pulse sent to it
by PDIU-DS.
NOTE:
It is recommended to change the escape
sequence (typically + + +) of a modem con-
nected to a PDIU-DS. Separate sequences
will enable users to escape from a modem or
a DIU more selectively. Escape sequences
are changed with the “ATS2 = - ’ com-
mand.
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Security Groups, LEDs 17 - 20-Data
security groups can be set to block data calls
between DIUs. DIU users can only make
data calls to DlUs in the same security
group. LEDs 17 - 20 assign the DIU to the
appropriate security group: light LED 17 for
group 1; LED 18, for group 3; LED 19, for
group 2; and LED 20, for group 4.
Typical LED settings for Program 20.
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PDIU-Dl(2) Connected to a Terminal or
Personal Computer-LEDsOl, 02,05, and
17 ON; all other LEDs OFF.
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PDIU-DS Connected to a Printer-LEDs
01, 04, and 17 ON; all other LEDs OFF.
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PDIU-DS Connected to a Modem-LEDs
01,02,03,04,06, and 17 ON; all other LEDs
OFF.
Program 21-Modem Pool Port Assignments:
With this program, identify modems connected
to standard telephone ports (line side of mo-
dem) and PDIU-DS ports (RS-232 side of mo-
dem). Each selection pair assigns the modem to
the system modem pool. With data security
groups (Program 20, LEDs 17 - 20) and the call
blocking feature (Program 31, LED 04), modem
access can be denied or allowed to data users.
NOTES:
1.
2.
3.
4.
5.
6.
To provide data security for modems, turn
ON LED 18 in Program 31 for standard
telephone ports supporting modems. To
allow callers to switch from voice to data,
turn OFF LED 18 for standard telephone
ports supporting modems.
Digital telephones with PDIUDl(2)s that
must access modems from a pool require
that a Modem button be assigned to
them in Program 39.
PDIU-DS ports that are connected to
modems in the modem pool should be set
with LEDs 01, 02, 03, 04, and 06 ON in
Program 20.
If a modem that is connected to PDIU-DS
is also connected to a telephone network
CO line, instead of a standard telephone
port, Program 21 should not be used.
Use Program 22 to assign modem/PDIU-
DS stations to a hunt sequence.
DllJs can be connected to any digital
circuit in the DK8 KSU or DK16 Base Unit;
or on the QCDU (STRATA DK8), KCDU
(STRATA DKl6), orPDKU2, but can only
connect to Circuits 1 - 7 on the PDKUI.
Program 22-Data Interface Unit (DIU) Station
Hunting: If a DIU station (printer, modem, etc.)
is busy, data station hunting allows the data call
to that station to hunt to an alternate DIU station
assigned in this program. If the hunted DIU
station is busy, the system will ring the next
“hunt-to” station, and so on. If all DIU stations in
2-10