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3C
OM
I
MPACT
ISDN E
XTERNAL
D
IGITAL
M
ODEM
Q
UICK
S
TART
I
NSTRUCTIONS
Figure 1
3Com Impact Digital Modem Rear Panel
Installing the Digital Modem in an IBM-compatible PC
To install the 3Com Impact digital modem in an IBM or
compatible PC, follow these steps:
1
Turn off the computer.
2
Insert the 9-pin male end of the 3Com Impact digital
modem-to-PC serial signal cable into the connector labeled
Computer on the digital modem’s back panel and tighten the
connector screws.
3
Connect the other end of the 3Com Impact digital
modem-to-PC serial signal cable to a serial communications
(COM) port on the back of your PC and tighten the connector
screws.
4
Connect the 3Com Impact digital modem power cable to the
connector marked 12V AC on the back panel of the digital
modem.
5
Plug the transformer end of the power cable into a standard
117V ac wall outlet.
6
Connect the RJ-45 (8-pin) connector end of the RJ-45/RJ-11
ISDN cable to the RJ-45 connector labeled Wall on the
digital modem’s back panel.
7
Connect the RJ-11 (6-pin) connector end of the RJ-45/RJ-11
ISDN cable to the RJ-11 telephone ISDN jack.
Power 12V AC RS232D
Wall
ISDN BRI-U ONLY
RS232D
09-0700-002 Page 4 Sunday, December 22, 1996 3:40 PM