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INSTALLATION-PERIPHERALS
SECTION 200-096-208
FEBRUARY1991
nance modem to the PIOU or PIOUS PCB is
accomplished with a standard 3-pair modular cord
and a PPTC adaptor connected to the PIOU or
PIOUS TTY jack (refer to Figure 8-21).
NOTE:
If the IMDUmodem is used, the PPTC adapter
or modular cord is not required.
8.20 Local Maintenance Terminal Installation
8.21 Install the ASCII terminal in accordance with
the following steps (refer to Figure 8-21):
1) Connect the 3-pair modular cable (or 24 AWG
twisted pairs) and the PPTC adaptor from the
PIOU or PIOUS TTY port to the remote main-
tenance terminal DB25 connector.
2) Set the PIOU or PIOUS SW2 switch to match
the modem or terminal baud rate:
l
Push in for 300 bps (baud rate indicator
CD4 is lighted); let out (by pushing again)
for 1200 bps (CD4 is not lighted).
3) Set the PIOU or PIOUS SW3switch to
theTTY
position.
4) Set the P13 jumper plug on the PIOU to the
BELL
configuration, or cut the W4 jumper on
the PIOUS (also for
BELL
configuration).
NOTE:
The PI3 (PIOU) and W4 (PIOUS) CCITT
configurations are not normally used in the
USA.
5) Programming and system testing, via the
maintenance terminal, is described in the
Remote Maintenance Procedures, Section
200-096-400.
NOTE:
If the electronic telephone connected to pot?
05 is in the program mode, programming from
the maintenance terminal is not allowed.
8.30 Remote Maintenance Option Installation
8.31 IMDU Maintenance Modem.
The IMDU
modem mounts on the PIOU or PIOUS PCB and
provides 300 or 1200 bps, full-duplex communica-
tion for remote maintenance. If the IMDU is em-
ployed, a dedicated CO line, PSTU, oi PESU
connection is not required. Connection of the re-
mote maintenance terminal is through existing sys-
tem CO lines via intercom number 19. Refer to the
PIOU or PIOUS portion of Section 200-096-206 for
details on hardware installation and programming
requirements. Remote Maintenance Procedures,
Section 200-096-400, provides more information
about using the IMDU for remote maintenance.
.:
:
8.32 External Maintenance Modem Installation.
Install the external modem in accordance with the
following steps (refer to Figure 8-21):
NOTE:
The Toshiba PPTC IX-232 modular-to-D925
adaptor is factory-configured for ASCII termi-
nal connection. Pins 2 and 3 of the adaptor
must be reversed for external modem connec-
tion.
1)
2)
3)
4)
Connect the modular cord from the PIOU or
PIOUS TTY port to the PPTC adapter and
then to the external maintenance modem RS-
232 25pin connector.
Connect the external maintenance modem
line-side to a dedicated CO line (tip and ring)
or to a dedicated PSTU or PESU standard
telephone port (tip and ring). Refer to Wiring
Diagrams, Section 200-096-209, for wiring/
interconnecting details.
Set the PIOU or PIOUS SW2 switch to match
the modem or terminal baud rate:
l
Push in for 300 bps (baud rate indicator
CD4/LED is lighted); let out for 1200 bps
(CD4 is not lighted).
Set the PIOU or PIOUS SW3switch to the TTY
position.
NOTE:
The PIOU or PIOUS SW3 switch is set to the
MODEM position for IMDU operation only.
5) Set the
PI3
jumper plug on the PIOU to the
BELL
configuration, or cut the W4 jumper on
the PIOUS (also for
BELL
configuration).
-.,
. . :;’
8-14