Modems - DEC VAXstation 3100 Owner's Manual

8.2 Modems
A modem is a device that converts computer signals to signals
that can be sent over a telephone line. Modems are typically used
for communications in large networks, for instance wide area
networks (WANs).
The communications port on the back of the VAXstation 3100
system vmit is set at the factory at 1200 baud. Refer to your
modem documentation for instructions on setting your modem
baud rate. Table 8-3 Hsts the modems available for the Model 48
sjrstem.
Table 8-3 Modems
Modem Description
DF242 Scholar Plus 300, 1200, and 2400 bps O^its per second) full
duplex asynchronoiis
DF224 300, 1200, and 2400 bps full-duplex
asjnachronous
DF212 300, 600, and 1200 bps full-duplex
asynchronous
DF112 300 and 1200 bps full-duplex asynchronous
DF03 300 and 1200 bps full-duplex asynchronous
When you order a modem, you need to order a DEC 423 serial line
cable and a 25-pin D-sub adapter/DECconnect passive adapter, to
connect the modem to your VAXstation 3100 system. Autoanswer
is not available; data leads only are connected.
To connect your modem:
lO
1 Turn off (0) modem and other equipment, including expansion
boxes and the system unit.
Note See your software documentation for shutdown procedures
before turning your system off. Also, you should not turn
off, halt, or restart the system without notifying work group
members.
2 Follow the directions that come with your modem to set it up.
8-4 Adding Options