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16
MINI-MODEM V.92
CAUTION
The circuit board can be harmed by static electricity. Before you open
the case, touch a grounded object (such as the metal chassis of your
computer) to discharge any static electricity in your body. Then touch
the metal shell of the modem’s RS-232 connector to ensure that there is
no voltage difference between you and the modem.
3.3.1 O
PENING THE
M
ODEM
1. If the modem is connected, turn it off and remove all connecting cables,
including the power and line cables.
2. Turn the modem upside down.
3. On the bottom of the modem are two screws, which hold the case together.
Remove both screws and set them aside.
4. Turn the modem right side up.
5. Remove the top part of the modem case.
6. To close the modem, reverse steps 1 through 5.
3.3.2 C
HANGING THE
D
IAL
-U
P
/L
EASED
-L
INE
J
UMPERS
As shipped from the factory, your modem is configured for normal dial-up
operation. That is, the modem must dial a phone number to connect to another
modem. To use the modem on a leased line, you must change jumper J10 to select
leased-line operation, and J11 to select whether it will be the originating or the
answering modem. (If dial-up operation is selected, J11 has no effect.)
See Figure 3-2 for jumper locations and positions. See Chapter 4 for additional
information about leased lines.
• To use the modem on a leased line, move the J10 jumper plug from the
default dial-up position to the leased line position.
• To make the modem the originating modem on the leased line, move the J11
jumper plug to the originate position.
• To make the modem the answering modem on the leased line, leave the J11
jumper plug in the factory-default answer position.