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Period Dial Modifier
The period ('.') dial modifier is used to send DTMF tones after the
telephone number is dialed. The period dial modifier can be used with
the comma (',') dial modifier to insert delay between the numbers as
appropriate for the application. A typical application for the period dial
modifier is use with PBX systems.
Example: ATDT18479335200.980234
In this example, 18479335200 will be dialed using ISDN signaling, then
980234 will be dialed using in band DTMF signaling.
PCSDL vs. XMODEM
In certain situations, such as running under a multitasking OS such as
Microsoft Windows 95, you may experience difficulty performing a
software download using PCSDL. As a result, U.S. Robotics recommends
using PCSDL under DOS only or performing software download using
the XMODEM file transfer protocol as described in the Courier I-modem
Command Reference in section 17-2.
230 kbps DTE Rate Under Windows
If you are using a Windows® 95 terminal program, you will be unable to
set your transmission speed to 230 kbps.
230 kbps in Internal I-modems
The I-modem operates at 230 kbps when appropriate regardless of the
transmission speed setting.
Note: Windows does not display the actual data rate for internal
I-modems.
230 kbps in External I-modems
To take advantage of the 230 kbps data rate, you may need to purchase a
high speed (230 kbps) serial card.
Note: Depending on the serial card you purchase, the actual data rate
may not appear correctly in Windows. Consult the serial card
documentation if this problem occurs.
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Courier I-modem Getting Started Guide
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