Recommended Settings - US Robotics COURIER User Manual

COURIER HIGH SPEED MODEMS
The modem is shipped ready for use except for Transmit
Data flow control. This type of flow control is required for
calls under error control, and when the computer sends data
to the modem faster than the modem can send it over the
phone link.
How you set your modem depends on whether or not your
machine or software support flow control, and what type of
flow control they allow. Use the guidelines that follow.
Recommended Settings
The following recommended settings will yield the best data
reliability and throughput. Check the quick-configuration guide
that came with the modem to see if your communications
program is listed and whether it supports both a fixed data rate
between the computer and modem (setting the modem to &Bl)
and hardware flow control (setting the modem to &Hl). If a
program only supports software flow control (XON /XOFF
characters), use the Alternative Settings after this section.
If necessary, review your computer /terminal and software
documentation as well to see if your system supports the
recommended settings. If either your software or machine do
not, use the Alternative Settings after this section.
1. Set your software to the highest rate your equipment and
software support: 19.2K, 38.4K, or 57.6K bits per second.
This sets a high serial port rate, that is, the rate of data
transmission between the computer and the modem.
2. Set the software to a fixed serial port rate so that the
computer and modem maintain the high rate, regardless of
the rate on the phone line. Some programs call this locking
the serial port.
3. Set the software for hardware flow control. This may be
called RTS/CTS. The modem uses Clear to Send (CTS) to
control the data flow from the computer. This is the most
efficient and reliable form of flow control.
4. Set the modem to a fixed serial port rate (&Bl) and hardware
flow control (&H1). Have your software put the computer
in Terminal mode, as shown in Step 3 of Chapter 2, Testing
3-2 Quick Start
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-