Technical data

3. If you plan to use modem B:
a. Insert a second eight-wire telephone line into the bottom jack on
the module cover, marked with a line icon. (Notice that the jack
positions are reversed for modem B.)
b. Insert the other end of the cord into a wall-mounted modular
telephone jack.
If you require voice communication on modem B, refer to step 4.
4. If you require voice communication with a modem, you can install it in
one of two ways:
• The first way of installing voice communication is established for
modems A and B in the preceding steps. The telephone is connected
to the wall-mounted modular telephone jack, which is in turn
connected to the module cover (see Figure 17).
• The second way of installing voice communication is by connecting
the telephone to the module cover, which is in turn connected to the
wall-mounted modular telephone jack as shown in Figure 18.
28 VAX 4000 Model 300 Installation