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REMOTE ADMINISTRATION AND MAINTENANCE PROCEDURES
SECTION 100-816-600
MARCH 1993
-4-
TABLE RM-A
PPTC MODIFIED WIRING FOR EXTERNAL MODEM TO TTY CONNECTION
FIGURE 4
REMOTE MAINTENANCE USING IMDU MODEM (DK16 ONLY)
REMOTE
MODEM
RS-232
CABLE
CO LINE
TELEPHONE
NETWORK
ROM
AND
RAM
DK16
CO LINE
CIRCUIT
DK16
CO line connects to IMDU port (619)
via: DISA, Ring transfer, or ringing
assignments in Program 78
PIOU OR PIOUS
CO LINE
IMDU
TIME
SWITCH
PPTC1A-5M ADAPTORQSMU OR PIOU/PIOUS,
TTY JACK
MODULAR PIN NO.
MODULAR PIN NO.
1
2
3
4
5
6
RD
TD
DSR
DTR
DCD
SG
RD,
TD,
DSR,
DTR,
DCD,
SG,
6
5
4
3
2
1
to
to
to
to
to
to
3*
2*
6
20*
8*
7
4 Jumper to 5
RD
TD
DSR
DTR
DCD
SG
RTS to CTS
to
to
to
to
to
to
DB25 PIN NO.
MODEM
RS-232
LEAD NAME
PPCT (Modular to DB25) ADAPTOR, MODIFIED WIRING FOR
CONNECTING TTY JACK TO AN EXTERNAL MODEM:
IMPORTANT:
*
PPTC1A-5M, pins 2 & 3 and pins 8 & 20 must
be reversed in the field, as shown, for modem
connection. Set Hayes modem to track status of
carrier detect signal (AT & C1) and to answer
(ATS0 = 1).