US Robotics COURIER - Page 27

COURIER HIGH SPEED MODEMS
telephone and modem in one call, although not at the same
time. Voice/Data, in Appendix E, explains how to switch
control of the phone line between the phone and the modem.
5. Next, check the positions of the bank of Dual In-Line
Package (DIP) Switches located in the well at the bottom of
the modem. These switches are set at the factory to the
positions most users require.
1 2 3 4 5 6 7 8 9 10 QUAD
~r:1~1~1~1~1~1~1~101~1~11 11.
Figure 2.4-DIP Switch Factory Settings
The quick-configuration guide that came with the manual
shows recommended switch settings for many widely-used
communications software products. If your communications
software is not listed, check your software documentation
for its requirements, particularly for DIP switches 1, 4, 5
and 6. You'll also find descriptions of switch functions and
options in Appendix B.
If you already know your requirements, use the guide on the
bottom of the modem or the summary in the Quick Refer-
ence Card to verify the switch positions.
NOTE: If you have built your own RS-232 cable and it does
not support Data Terminal Ready (DTR), set DIP switch 1
ON, for the DTR override. The override causes the modem
to operate as if the DTR signal is always ON, and enables the
modem to accept commands. Most purchased
communications software, however, requires DTR.
DIP switch 10 is explained under Setting/Using Defaults in
Chapter 5. Most users will want to leave this switch OFF,
write their own defaults to nonvolatile memory (NVRAM),
and have those defaults loaded at power on.
The wider Quad switch on the right of the numbered
switches should be left OFF unless you know your equipment
reverses the transmit and receive pins at the RS-232 interface (see
Appendix B, DIP Switch Summary).
2-6 Set-up and Testing
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